# VFS: Unable to mount root fs on unknown-block **URL:** \ **Category:** Support\ **Created:** [March 11, 2024, 1:51am UTC](https://discuss.pynq.io/t/vfs-unable-to-mount-root-fs-on-unknown-block/6753 "2024-03-11T01:51:57Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![laifu](https://avatars.discourse-cdn.com/v4/letter/l/d9b06d/32.png) [@laifu](https://discuss.pynq.io/u/laifu)\ **Post date:** [March 11, 2024, 1:51am UTC](https://discuss.pynq.io/t/vfs-unable-to-mount-root-fs-on-unknown-block/6753/1 "2024-03-11T01:51:57Z")
I compile pynq2.7 in xczu115eg The vivado version is 2020.2 Although myboards.img was successfully compiled, an error was encountered: This is the compilation error log: INFO: Sourcing build environment INFO: bitbake wic-tools Parsing recipes: 100% |#########################################| Time : 0:00:37 Parsing of 2998 .bb files complete (0 cached, 2998 parsed). 4270 targets, 216 skipped, 0 masked, 0 errors. NOTE: Resolving any missing task queue dependencies Initializing tasks: 100% |######################################| Time: 0: 00:00 Checking sstate mirror object availability: 100% |###############| Time: 0:00:00 Sstate summary: Wanted 33 Found 33 Missed 0 Current 71 (100% match, 100% complete) NOTE: Executing Tasks NOTE: Setscene tasks completed NOTE: Tasks Summary: Attempted 523 tasks of which 502 didn’t need to be rerun and all succeeded. INFO: Extracting rootfs, This may take time! INFO: Creating wic image… INFO: wic create /home/cgc/part/PYNQ/sdbuild/boot/image.wks --rootfs-dir /home/cgc/part/PYNQ/sdbuild/build/ZCU115/petalinux\_project/build/wic/rootfs --bootimg -dir /home/cgc/part/PYNQ/sdbuild/build/focal.ZCU115 --kernel-dir /home/cgc/part/PYNQ/sdbuild/build/focal.ZCU115 --outdir /tmp/tmp.98cFv5kXuA -n /home/cgc/part/PYNQ/sdbuild/build/ZCU115/petalinux\_project/build/tmp/work/aarch64-xilinx-linux/wic-tools/1.0-r0/recipe-sysroot-native INFO: Creating image(s)… WARNING: bootloader config not specified, using defaults INFO: The new image(s) can be found here: /tmp/tmp.98cFv5kXuA/image-202403101432-mmcblk0.direct The following build artifacts were used to create the image(s): ROOTFS\_DIR: /home/cgc/part/PYNQ/sdbuild/build/ZCU115/petalinux\_project/build/wic/rootfs BOOTIMG\_DIR: /home/cgc/part/PYNQ/sdbuild/build/focal.ZCU115 KERNEL\_DIR: /home/cgc/part/PYNQ/sdbuild/build/focal.ZCU115 NATIVE\_SYSROOT: /home/cgc/part/PYNQ/sdbuild/build/ZCU115/petalinux\_project/build/tmp/work/aarch64-xilinx-linux/wic-tools/1.0-r0/recipe-sysroot-native INFO: The image(s) were created using OE kickstart file: /home/cgc/part/PYNQ/sdbuild/boot/image.wks Num Start End Size Fstype 1 4096 136318975 136314880 fat16 2 137363456 9168549887 9031186432 ext4 mkdir -p /home/cgc/part/PYNQ/sdbuild/output/dist mkdir -p /home/cgc/part/PYNQ/sdbuild/output/dist/aarch64 cp -rf /home/cgc/part/PYNQ/sdbuild/build/PYNQ/dist/_.tar.gz /home/cgc/part/PYNQ/sdbuild/output/dist/aarch64 cp: cannot stat '/home/cgc/part/PYNQ/sdbuild/build/PYNQ/dist/_.tar.gz’: No such file or directory Makefile:346: recipe for target ‘/home/cgc/part/PYNQ/sdbuild/output/dist/aarch64’ failed make: \*\*\* [/home/cgc/part/PYNQ/sdbuild/output/dist/aarch64] Error 1 As shown above, the script generates img under output, this error does not seem to be a big problem. Then I put the generated myboard.img into the sd card, and then put it into the development board to start. I encountered the following error: Xilinx Zynq MP First Stage Boot Loader Release 2020.2 Mar 10 2024 - 14:25:04 NOTICE: ATF running on XCZU15EG/silicon v4/RTL5.1 at 0xfffea000 NOTICE: BL31: v2.2(release):xilinx\_rebase\_v2.2\_2020.1-10-ge6eea88b1 NOTICE: BL31: Built : 14:26:12, Mar 10 2024 U-Boot 2020.01 (Mar 10 2024 - 14:24:10 +0000) Board: Xilinx ZynqMP DRAM: 4 GiB usb dr\_mode not found PMUFW: v1.1 EL Level: EL2 Chip ID: zu15eg NAND: 0 MiB MMC: mmc@ff160000: 0, mmc@ff170000: 1 In: serial@ff000000 Out: serial@ff000000 Err: serial@ff000000 Bootmode: SD\_MODE1 Reset reason: EXTERNAL Net: ZYNQ GEM: ff0e0000, mdio bus ff0e0000, phyaddr -1, interface rgmii-id Warning: ethernet@ff0e0000 (eth0) using random MAC address - 1e:76:a0:41:69:e9 eth0: ethernet@ff0e0000 Hit any key to stop autoboot: 0 switch to partitions #0, OK mmc1 is current device Scanning mmc 1:1… Found U-Boot script /boot.scr 1636 bytes read in 13 ms (122.1 KiB/s) ## Executing script at 20000000 18318900 bytes read in 1353 ms (12.9 MiB/s) ## Loading kernel from FIT Image at 10000000 … Using ‘conf@1’ configuration Trying ‘kernel@0’ kernel subimage Description: Linux Kernel Type: Kernel Image Compression: uncompressed Data Start: 0x100000d4 Data Size: 18278912 Bytes = 17.4 MiB Architecture: AArch64 OS: Linux Load Address: 0x00080000 Entry Point: 0x00080000 Hash algo: sha1 Hash value: af98e090eca96b74c4891fc0263614aea4d93822 Verifying Hash Integrity … sha1+ OK ## Loading fdt from FIT Image at 10000000 … Using ‘conf@1’ configuration Trying ‘fdt@0’ fdt subimage Description: Flattened Device Tree blob Type: Flat Device Tree Compression: uncompressed Data Start: 0x1116ebcc Data Size: 38163 Bytes = 37.3 KiB Architecture: AArch64 Hash algo: sha1 Hash value: e4b5e45cd22ddf02c6636d6b6d9b596f9f1e2958 Verifying Hash Integrity … sha1+ OK Booting using the fdt blob at 0x1116ebcc Loading Kernel Image Loading Device Tree to 000000000fff3000, end 000000000ffff512 … OK Starting kernel … [0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd034] [0.000000] Linux version 5.4.0-xilinx-v2020.2 (oe-user@oe-host) (gcc version 9.2.0 (GCC)) #1 SMP Sun Mar 10 19:03 UTC 2024 [0.000000] Machine model: xlnx,zynqmp [0.000000] efi: Getting EFI parameters from FDT: [0.000000] efi: UEFI not found. [0.000000] cma: Reserved 128 MiB at 0x0000000077c00000 [0.000000] psci: probing for conduit method from DT. [0.000000] psci: PSCIv1.1 detected in firmware. [0.000000] psci: Using standard PSCI v0.2 function IDs [0.000000] psci: MIGRATE\_INFO\_TYPE not supported. [0.000000] psci: SMC Calling Convention v1.1 [0.000000] percpu: Embedded 22 pages/cpu s50392 r8192 d31528 u90112 [0.000000] Detected VIPT I-cache on CPU0 [0.000000] CPU features: detected: ARM erratum 845719 [0.000000] Speculative Store Bypass Disable mitigation not required [0.000000] Built 1 zonelists, mobility grouping on. Total pages: 1031940 [0.000000] Kernel command line: root=/dev/mmcblk0p2 rw earlyprintk rootfstype=ext4 rootwait devtmpfs.mount=1o\_pdrv\_genirq.of\_id=“generic-uio” clk\_ignore\_unused [0.000000] Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes, linear) [0.000000] Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes, linear) [0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off [0.000000] software IO TLB: mapped [mem 0x73c00000-0x77c00000] (64MB) [0.000000] Memory: 3897408K/4193280K available (12476K kernel code, 762K rwdata, 3752K rodata, 768K init, 57bss, 164800K reserved, 131072K cma-reserved) [0.000000] rcu: Hierarchical RCU implementation. [0.000000] rcu: RCU event tracing is enabled. [0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies. [0.000000] NR\_IRQS: 64, nr\_irqs: 64, preallocated irqs: 0 [0.000000] GIC: Adjusting CPU interface base to 0x00000000f902f000 [0.000000] GIC: Using split EOI/Deactivate mode [0.000000] random: get\_random\_bytes called from start\_kernel+0x2a8/0x42c with crng\_init=0 [0.000000] arch\_timer: cp15 timer(s) running at 100.00MHz (phys). [0.000000] clocksource: arch\_sys\_counter: mask: 0xffffffffffffff max\_cycles: 0x171024e7e0, max\_idle\_ns: 440705315 ns [0.000007] sched\_clock: 56 bits at 100MHz, resolution 10ns, wraps every 4398046511100ns [0.000600] Console: colour dummy device 80x25 [0.001014] printk: console [tty0] enabled [0.001056] Calibrating delay loop (skipped), value calculated using timer frequency.. 200.00 BogoMIPS (lpj=400) [0.001089] pid\_max: default: 32768 minimum: 301 [0.001402] Mount-cache hash table entries: 8192 (order: 4, 65536 bytes, linear) [0.001449] Mountpoint-cache hash table entries: 8192 (order: 4, 65536 bytes, linear) [0.003281] ASID allocator initialised with 32768 entries [0.003414] rcu: Hierarchical SRCU implementation. [0.003951] EFI services will not be available. [0.004241] smp: Bringing up secondary CPUs … [0.004914] Detected VIPT I-cache on CPU1 [0.004968] CPU1: Booted secondary processor 0x0000000001 [0x410fd034] [0.005701] Detected VIPT I-cache on CPU2 [0.005743] CPU2: Booted secondary processor 0x0000000002 [0x410fd034] [0.006431] Detected VIPT I-cache on CPU3 [0.006473] CPU3: Booted secondary processor 0x0000000003 [0x410fd034] [0.006579] smp: Brought up 1 node, 4 CPUs [0.006666] SMP: Total of 4 processors activated. [0.006685] CPU features: detected: 32-bit EL0 Support [0.006704] CPU features: detected: CRC32 instructions [0.006778] CPU: All CPU(s) started at EL2 [0.006816] alternatives: patching kernel code [0.008864] devtmpfs: initialized [0.017576] clocksource: jiffies: mask: 0xffffffff max\_cycles: 0xffffffff, max\_idle\_ns: 7645041785100000 ns [0.017617] futex hash table entries: 1024 (order: 4, 65536 bytes, linear) [0.024484] xor: measuring software checksum speed [0.064076] 8regs : 1039.000 MB/sec [0.104138] 32regs : 1192.000 MB/sec [0.144206] arm64\_neon: 1035.000 MB/sec [0.144224] xor: using function: 32regs (1192.000 MB/sec) [0.144297] pinctrl core: initialized pinctrl subsystem [0.144932] DMI not present or invalid. [0.145412] NET: Registered protocol family 16 [0.147520] DMA: preallocated 256 KiB pool for atomic allocations [0.147578] audit: initializing netlink subsys (disabled) [0.147795] audit: type=2000 audit(0.144:1): state=initialized audit\_enabled=0 res=1 [0.148503] cpuidle: using governor menu [0.148887] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers. [0.149196] Serial: AMBA PL011 UART driver [0.176583] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages [0.176612] HugeTLB registered 32.0 MiB page size, pre-allocated 0 pages [0.176634] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages [0.176656] HugeTLB registered 64.0 KiB page size, pre-allocated 0 pages [2.608010] cryptd: max\_cpu\_qlen set to 1000 [2.661439] DRBG: Continuing without Jitter RNG [2.747948] raid6: neonx8 gen() 676 MB/s [2.816017] raid6: neonx8 xor() 641 MB/s [2.884101] raid6: neonx4 gen() 652 MB/s [2.952219] raid6: neonx4 xor() 625 MB/s [3.020300] raid6: neonx2 gen() 496 MB/s [3.088414] raid6: neonx2 xor() 520 MB/s [3.156549] raid6: neonx1 gen() 323 MB/s [3.224589] raid6: neonx1 xor() 391 MB/s [3.292704] raid6: int64x8 gen() 509 MB/s [3.360866] raid6: int64x8 xor() 333 MB/s [3.428952] raid6: int64x4 gen() 430 MB/s [3.496992] raid6: int64x4 xor() 323 MB/s [3.565215] raid6: int64x2 gen() 299 MB/s [3.633194] raid6: int64x2 xor() 262 MB/s [3.701453] raid6: int64x1 gen() 198 MB/s [3.769486] raid6: int64x1 xor() 201 MB/s [3.769505] raid6: using algorithm neonx8 gen() 676 MB/s [3.769521] raid6: … xor() 641 MB/s, rmw enabled [3.769538] raid6: using neon recovery algorithm [3.770150] iommu: Default domain type: Translated [3.770678] SCSI subsystem initialized [3.770977] usbcore: registered new interface driver usbfs [3.771049] usbcore: registered new interface driver hub [3.771115] usbcore: registered new device driver usb [3.771193] mc: Linux media interface: v0.10 [3.771244] videodev: Linux video capture interface: v2.00 [3.771299] pps\_core: LinuxPPS API ver. 1 registered [3.771317] pps\_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti [giometti@linux.it](mailto:giometti@linux.it) [3.771357] PTP clock support registered [3.771403] EDAC MC: Ver: 3.0.0 [3.772138] zynqmp-ipi-mbox mailbox@ff990400: Registered ZynqMP IPI mbox with TX/RX channels. [3.772481] FPGA manager framework [3.772755] Advanced Linux Sound Architecture Driver Initialized. [3.773298] Bluetooth: Core ver 2.22 [3.773361] NET: Registered protocol family 31 [3.773379] Bluetooth: HCI device and connection manager initialized [3.773402] Bluetooth: HCI socket layer initialized [3.773422] Bluetooth: L2CAP socket layer initialized [3.773452] Bluetooth: SCO socket layer initialized [3.774149] clocksource: Switched to clocksource arch\_sys\_counter [3.774369] VFS: Disk quotas dquot\_6.6.0 [3.774468] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes) [3.783457] NET: Registered protocol family 2 [3.784161] tcp\_listen\_portaddr\_hash hash table entries: 2048 (order: 3, 32768 bytes, linear) [3.784281] TCP established hash table entries: 32768 (order: 6, 262144 bytes, linear) [3.784760] TCP bind hash table entries: 32768 (order: 7, 524288 bytes, linear) [3.785622] TCP: Hash tables configured (established 32768 bind 32768) [3.785752] UDP hash table entries: 2048 (order: 4, 65536 bytes, linear) [3.785931] UDP-Lite hash table entries: 2048 (order: 4, 65536 bytes, linear) [3.786303] NET: Registered protocol family 1 [3.786805] RPC: Registered named UNIX socket transport module. [3.786827] RPC: Registered udp transport module. [3.786843] RPC: Registered tcp transport module. [3.786859] RPC: Registered tcp NFSv4.1 backchannel transport module. [3.787354] PCI: CLS 0 bytes, default 64 [3.852206] Initialise system trusted keyrings [3.852373] workingset: timestamp\_bits=46 max\_order=20 bucket\_order=0 [3.853357] squashfs: version 4.0 (2009/01/31) Phillip Lougher [3.854064] NFS: Registering the id\_resolver key type [3.854096] Key type id\_resolver registered [3.854113] Key type id\_legacy registered [3.854161] nfs4filelayout\_init: NFSv4 File Layout Driver Registering… [3.854211] jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc. [3.883872] NET: Registered protocol family 38 [3.883895] Key type asymmetric registered [3.883912] Asymmetric key parser ‘x509’ registered [3.883969] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 245) [3.884137] io scheduler mq-deadline registered [3.884158] io scheduler kyber registered [3.887811] ps\_pcie\_dma init() [3.942580] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [3.944650] Serial: AMBA driver [3.949077] cacheinfo: Unable to detect cache hierarchy for CPU 0 [3.958337] brd: module loaded [3.967362] loop: module loaded [3.968887] mtdoops: mtd device (mtddev=name/number) must be supplied [3.972074] libphy: Fixed MDIO Bus: probed [3.974516] tun: Universal TUN/TAP device driver, 1.6 [3.974695] CAN device driver interface [3.978384] usbcore: registered new interface driver cdc\_acm [3.978405] cdc\_acm: USB Abstract Control Model driver for USB modems and ISDN adapters [3.978469] usbcore: registered new interface driver cdc\_wdm [3.978543] usbcore: registered new interface driver usb-storage [3.978659] usbcore: registered new interface driver usbserial\_generic [3.978709] usbserial: USB Serial support registered for generic [3.978765] usbcore: registered new interface driver usb\_serial\_simple [3.978813] usbserial: USB Serial support registered for carelink [3.978857] usbserial: USB Serial support registered for zio [3.978901] usbserial: USB Serial support registered for funsoft [3.978952] usbserial: USB Serial support registered for flashloader [3.979001] usbserial: USB Serial support registered for google [3.979048] usbserial: USB Serial support registered for libtransistor [3.979094] usbserial: USB Serial support registered for vivopay [3.979138] usbserial: USB Serial support registered for moto\_modem [3.979184] usbserial: USB Serial support registered for motorola\_tetra [3.979234] usbserial: USB Serial support registered for novatel\_gps [3.979281] usbserial: USB Serial support registered for hp4x [3.979326] usbserial: USB Serial support registered for suunto [3.979371] usbserial: USB Serial support registered for siemens\_mpi [3.980198] rtc\_zynqmp ffa60000.rtc: registered as rtc0 [3.980302] i2c /dev entries driver [3.984685] device-mapper: ioctl: 4.41.0-ioctl (2019-09-16) initialised: [dm-devel@redhat.com](mailto:dm-devel@redhat.com) [3.984821] Bluetooth: HCI UART driver ver 2.3 [3.984843] Bluetooth: HCI UART protocol H4 registered [3.984860] Bluetooth: HCI UART protocol BCSP registered [3.984907] Bluetooth: HCI UART protocol LL registered [3.984925] Bluetooth: HCI UART protocol ATH3K registered [3.984968] Bluetooth: HCI UART protocol Three-wire (H5) registered [3.985060] Bluetooth: HCI UART protocol Intel registered [3.985109] Bluetooth: HCI UART protocol QCA registered [3.985177] usbcore: registered new interface driver bcm203x [3.985243] usbcore: registered new interface driver bpa10x [3.985308] usbcore: registered new interface driver bfusb [3.985380] usbcore: registered new interface driver btusb [3.985471] usbcore: registered new interface driver ath3k [3.985732] EDAC MC: ECC not enabled [3.986039] EDAC DEVICE0: Giving out device to module zynqmp-ocm-edac controller zynqmp\_ocm: DEV ff960000.mem-controller (INTERRUPT) [3.986983] sdhci: Secure Digital Host Controller Interface driver [3.987004] sdhci: Copyright(c) Pierre Ossman [3.987019] sdhci-pltfm: SDHCI platform and OF driver helper [3.987701] ledtrig-cpu: registered to indicate activity on CPUs [3.987806] zynqmp\_firmware\_probe Platform Management API v1.1 [3.987829] zynqmp\_firmware\_probe Trustzone version v1.0 [4.033598] alg: No test for xilinx-zynqmp-aes (zynqmp-aes) [4.033864] zynqmp\_aes zynqmp\_aes: AES Successfully Registered [4.033864] [4.034245] alg: No test for xilinx-keccak-384 (zynqmp-keccak-384) [4.034758] alg: No test for xilinx-zynqmp-rsa (zynqmp-rsa) [4.035268] usbcore: registered new interface driver usbhid [4.035289] usbhid: USB HID core driver [4.035670] xlnk xlnk: Major 242 [4.035855] xlnk xlnk: xlnk driver loaded [4.035877] xlnk xlnk: xlnk\_pdev is not null [4.039933] ARM CCI\_400\_r1 PMU driver probed [4.040919] fpga\_manager fpga0: Xilinx ZynqMP FPGA Manager registered [4.041761] usbcore: registered new interface driver snd-usb-audio [4.043470] pktgen: Packet Generator for packet performance testing. Version: 2.75 [4.044421] IPVS: Registered protocols (TCP, UDP) [4.044487] IPVS: Connection hash table configured (size=4096, memory=64Kbytes) [4.044676] IPVS: ipvs loaded. [4.044695] IPVS: [rr] scheduler registered. [4.044960] Initializing XFRM netlink socket [4.045133] NET: Registered protocol family 10 [4.046021] Segment Routing with IPv6 [4.046299] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver [4.046962] NET: Registered protocol family 17 [4.046999] NET: Registered protocol family 15 [4.047046] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to d br\_netfilter if you need this. [4.047076] can: controller area network core (rev 20170425 abi 9) [4.047141] NET: Registered protocol family 29 [4.047161] can: raw protocol (rev 20170425) [4.047178] can: broadcast manager protocol (rev 20170425 t) [4.047200] can: netlink gateway (rev 20190810) max\_hops=1 [4.047358] Bluetooth: RFCOMM TTY layer initialized [4.047384] Bluetooth: RFCOMM socket layer initialized [4.047416] Bluetooth: RFCOMM ver 1.11 [4.047441] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [4.047459] Bluetooth: BNEP filters: protocol multicast [4.047480] Bluetooth: BNEP socket layer initialized [4.047498] Bluetooth: HIDP (Human Interface Emulation) ver 1.2 [4.047519] Bluetooth: HIDP socket layer initialized [4.047747] 9pnet: Installing 9P2000 support [4.047784] Key type dns\_resolver registered [4.048370] registered taskstats version 1 [4.048390] Loading compiled-in X.509 certificates [4.050255] Btrfs loaded, crc32c=crc32c-generic [4.066308] ff000000.serial: ttyPS0 at MMIO 0xff000000 (irq = 48, base\_baud = 6249999) is a xuartps [5.407046] printk: console [ttyPS0] enabled [5.412081] of-fpga-region fpga-full: FPGA Region probed [5.419109] nwl-pcie fd0e0000.pcie: Link is DOWN [5.423824] nwl-pcie fd0e0000.pcie: host bridge /amba/pcie@fd0e0000 ranges: [5.430847] nwl-pcie fd0e0000.pcie: MEM 0xe0000000..0xefffffff → 0xe0000000 [5.438110] nwl-pcie fd0e0000.pcie: MEM 0x600000000..0x7ffffffff → 0x600000000 [5.445848] nwl-pcie fd0e0000.pcie: PCI host bridge to bus 0000:00 [5.452058] pci\_bus 0000:00: root bus resource [bus 00-ff] [5.457561] pci\_bus 0000:00: root bus resource [mem 0xe0000000-0xefffffff] [5.464452] pci\_bus 0000:00: root bus resource [mem 0x600000000-0x7ffffffff pref] [5.471994] pci 0000:00:00.0: [10ee:d011] type 01 class 0x060400 [5.478044] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x000fffff] [5.484396] pci 0000:00:00.0: PME# supported from D0 D1 D2 D3hot [5.495778] pci 0000:00:00.0: BAR 0: assigned [mem 0xe0000000-0xe00fffff] [5.502596] pci 0000:00:00.0: PCI bridge to [bus 01-0c] [5.508681] xilinx-dpdma fd4c0000.dma: Xilinx DPDMA engine is probed [5.515470] xilinx-zynqmp-dma fd500000.dma: ZynqMP DMA driver Probe success [5.522780] xilinx-zynqmp-dma fd510000.dma: ZynqMP DMA driver Probe success [5.530086] xilinx-zynqmp-dma fd520000.dma: ZynqMP DMA driver Probe success [5.537396] xilinx-zynqmp-dma fd530000.dma: ZynqMP DMA driver Probe success [5.544705] xilinx-zynqmp-dma fd540000.dma: ZynqMP DMA driver Probe success [5.552025] xilinx-zynqmp-dma fd550000.dma: ZynqMP DMA driver Probe success [5.559328] xilinx-zynqmp-dma fd560000.dma: ZynqMP DMA driver Probe success [5.566645] xilinx-zynqmp-dma fd570000.dma: ZynqMP DMA driver Probe success [5.574028] xilinx-zynqmp-dma ffa80000.dma: ZynqMP DMA driver Probe success [5.581335] xilinx-zynqmp-dma ffa90000.dma: ZynqMP DMA driver Probe success [5.588644] xilinx-zynqmp-dma ffaa0000.dma: ZynqMP DMA driver Probe success [5.595952] xilinx-zynqmp-dma ffab0000.dma: ZynqMP DMA driver Probe success [5.603254] xilinx-zynqmp-dma ffac0000.dma: ZynqMP DMA driver Probe success [5.610557] xilinx-zynqmp-dma ffad0000.dma: ZynqMP DMA driver Probe success [5.617874] xilinx-zynqmp-dma ffae0000.dma: ZynqMP DMA driver Probe success [5.625184] xilinx-zynqmp-dma ffaf0000.dma: ZynqMP DMA driver Probe success [5.632675] xilinx-psgtr fd400000.zynqmp\_phy: Lane:3 type:8 protocol:4 pll\_locked:yes [5.644676] zynqmp\_clk\_divider\_set\_rate() set divider failed for pl0\_ref\_div1, ret = -13 [5.653257] xilinx-dp-snd-codec fd4a0000.zynqmp-display:zynqmp\_dp\_snd\_codec0: Xilinx DisplayPort Sound Codec bed [5.664227] xilinx-dp-snd-pcm zynqmp\_dp\_snd\_pcm0: Xilinx DisplayPort Sound PCM probed [5.672584] xilinx-dp-snd-pcm zynqmp\_dp\_snd\_pcm1: Xilinx DisplayPort Sound PCM probed [5.681382] xilinx-dp-snd-card fd4a0000.zynqmp-display:zynqmp\_dp\_snd\_card: xilinx-dp-snd-codec-dai ↔ xilinx-snd-codec-dai mapping ok [5.693945] xilinx-dp-snd-card fd4a0000.zynqmp-display:zynqmp\_dp\_snd\_card: xilinx-dp-snd-codec-dai ↔ xilinx-snd-codec-dai mapping ok [5.706334] xilinx-dp-snd-card fd4a0000.zynqmp-display:zynqmp\_dp\_snd\_card: ASoC: no DMI vendor name! [5.716188] xilinx-dp-snd-card fd4a0000.zynqmp-display:zynqmp\_dp\_snd\_card: Xilinx DisplayPort Sound Card prob [5.726492] OF: graph: no port node found in /amba/zynqmp-display@fd4a0000 [5.733568] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [5.740208] [drm] No driver support for vblank timestamp query. [5.746276] xlnx-drm xlnx-drm.0: bound fd4a0000.zynqmp-display (ops 0xffff800010d7faa8) [6.834200] [drm] Cannot find any crtc or sizes [6.839222] [drm] Initialized xlnx 1.0.0 20130509 for fd4a0000.zynqmp-display on minor 0 [6.847379] zynqmp-display fd4a0000.zynqmp-display: ZynqMP DisplayPort Subsystem driver probed [6.857002] spi\_master spi0: cannot find modalias for /amba/spi@ff0f0000/flash@0 [6.864443] spi\_master spi0: Failed to create SPI device for /amba/spi@ff0f0000/flash@0 [6.874769] macb ff0e0000.ethernet: Not enabling partial store and forward [6.882647] libphy: MACB\_mii\_bus: probed [6.890349] Generic PHY ff0e0000.ethernet-ffffffff:00: attached PHY driver [Generic PHY] (mii\_bus:phy\_addr=ff000.ethernet-ffffffff:00, irq=POLL) [6.903610] macb ff0e0000.ethernet eth0: Cadence GEM rev 0x50070106 at 0xff0e0000 irq 32 (1e:76:a0:41:69:e9) [6.914064] xilinx-axipmon ffa00000.perf-monitor: Probed Xilinx APM [6.920916] xilinx-axipmon fd0b0000.perf-monitor: Probed Xilinx APM [6.927700] xilinx-axipmon fd490000.perf-monitor: Probed Xilinx APM [6.934487] xilinx-axipmon ffa10000.perf-monitor: Probed Xilinx APM [6.941190] dwc3-of-simple ff9d0000.usb0: dwc3\_simple\_set\_phydata: Can’t find usb3-phy [6.949944] dwc3 fe200000.dwc3: Failed to get clk ‘ref’: -2 [6.957016] cdns-i2c ff020000.i2c: 400 kHz mmio ff020000 irq 34 [6.961261] xhci-hcd xhci-hcd.0.auto: xHCI Host Controller [6.963775] cdns-i2c ff030000.i2c: 400 kHz mmio ff030000 irq 35 [6.968488] xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 1 [6.975094] cdns-wdt fd4d0000.watchdog: Xilinx Watchdog Timer with timeout 60s [6.982226] xhci-hcd xhci-hcd.0.auto: hcc params 0x0238f625 hci version 0x100 quirks 0x0000000202010010 [6.989783] cdns-wdt ff150000.watchdog: Xilinx Watchdog Timer with timeout 10s [6.998768] xhci-hcd xhci-hcd.0.auto: irq 55, io mem 0xfe200000 [7.006677] cpufreq: cpufreq\_online: CPU0: Running at unlisted freq: 524999 KHz [7.012409] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.04 [7.019273] cpufreq: cpufreq\_online: CPU0: Unlisted initial frequency changed to: 599999 KHz [7.027507] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [7.043185] usb usb1: Product: xHCI Host Controller [7.048082] usb usb1: Manufacturer: Linux 5.4.0-xilinx-v2020.2 xhci-hcd [7.054715] usb usb1: SerialNumber: xhci-hcd.0.auto [7.060177] hub 1-0:1.0: USB hub found [7.063995] hub 1-0:1.0: 1 port detected [7.068321] xhci-hcd xhci-hcd.0.auto: xHCI Host Controller [7.073841] xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 2 [7.081533] xhci-hcd xhci-hcd.0.auto: Host supports USB 3.0 SuperSpeed [7.083366] mmc0: SDHCI controller on ff160000.mmc [ff160000.mmc] using ADMA 64-bit [7.088213] usb usb2: We don’t know the algorithms for LPM for this host, disabling LPM. [7.104121] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.04 [7.112422] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [7.119673] usb usb2: Product: xHCI Host Controller [7.124568] usb usb2: Manufacturer: Linux 5.4.0-xilinx-v2020.2 xhci-hcd [7.130935] mmc1: SDHCI controller on ff170000.mmc [ff170000.mmc] using ADMA 64-bit [7.131201] usb usb2: SerialNumber: xhci-hcd.0.auto [7.143754] rtc\_zynqmp ffa60000.rtc: setting system clock to 1974-04-03T10:42:16 UTC (134217736) [7.152573] of\_cfs\_init [7.152986] hub 2-0:1.0: USB hub found [7.155066] of\_cfs\_init: OK [7.158834] hub 2-0:1.0: 1 port detected [7.161816] cfg80211: Loading compiled-in X.509 certificates for regulatory database [7.253003] mmc0: new HS200 MMC card at address 0001 [7.259689] mmcblk0: mmc0:0001 Q2J55L 7.09 GiB [7.264642] mmcblk0boot0: mmc0:0001 Q2J55L partition 1 16.0 MiB [7.270969] mmcblk0boot1: mmc0:0001 Q2J55L partition 2 16.0 MiB [7.278063] mmcblk0rpmb: mmc0:0001 Q2J55L partition 3 4.00 MiB, chardev (243:0) [7.325316] mmc1: Tuning failed, falling back to fixed sampling clock [7.333955] mmc1: new ultra high speed SDR104 SDHC card at address b36b [7.341273] mmcblk1: mmc1:b36b SDABC 29.1 GiB (ro) [7.390843] mmc1: Tuning failed, falling back to fixed sampling clock [7.402246] usb 1-1: new high-speed USB device number 2 using xhci-hcd [7.482118] cfg80211: Loaded X.509 cert ‘sforshee: 00b28ddf47aef9cea7’ [7.488683] clk: Not disabling unused clocks [7.493225] ALSA device list: [7.496206] #0: DisplayPort monitor [7.500444] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 [7.509101] cfg80211: failed to load regulatory.db [7.514192] random: fast init done [7.517900] mmcblk1: p1 p2 [7.522024] VFS: Cannot open root device “mmcblk0p2” or unknown-block(179,2): error -6 [7.529978] Please append a correct “root=” boot option; here are the available partitions: [7.538369] 0100 65536 ram0 [7.538372] (driver?) [7.544493] 0101 65536 ram1 [7.544496] (driver?) [7.550628] 0102 65536 ram2 [7.550630] (driver?) [7.556744] 0103 65536 ram3 [7.556746] (driver?) [7.562864] 0104 65536 ram4 [7.562866] (driver?) [7.568974] 0105 65536 ram5 [7.568976] (driver?) [7.575097] 0106 65536 ram6 [7.575100] (driver?) [7.581222] 0107 65536 ram7 [7.581224] (driver?) [7.587351] 0108 65536 ram8 [7.587353] (driver?) [7.592571] usb 1-1: New USB device found, idVendor=05e3, idProduct=0610, bcdDevice=93.04 [7.593469] 0109 65536 ram9 [7.593471] (driver?) [7.601667] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [7.605421] 010a 65536 ram10 [7.605423] (driver?) [7.607778] usb 1-1: Product: USB2.1 Hub [7.614928] 010b 65536 ram11 [7.614931] (driver?) [7.618767] usb 1-1: Manufacturer: GenesysLogic [7.621124] 010c 65536 ram12 [7.621127] (driver?) [7.641981] 010d 65536 ram13 [7.641983] (driver?) [7.648199] 010e 65536 ram14 [7.648201] (driver?) [7.654420] 010f 65536 ram15 [7.654423] (driver?) [7.660621] b300 7438336 mmcblk0 [7.660625] driver: mmcblk [7.664404] hub 1-1:1.0: USB hub found [7.664651] b318 30542848 mmcblk1 [7.664655] driver: mmcblk [7.667682] hub 1-1:1.0: 4 ports detected [7.671196] b319 133120 mmcblk1p1 d7a8bd22-01 [7.671199] [7.688818] b31a 8819518 mmcblk1p2 d7a8bd22-02 [7.688820] [7.695631] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2) [7.704078] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.4.0-xilinx-v2020.2 #1 [7.711211] Hardware name: xlnx,zynqmp (DT) [7.715391] Call trace: [7.717838] dump\_backtrace+0x0/0x140 [7.721497] show\_stack+0x14/0x20 [7.724815] dump\_stack+0xac/0xd0 [7.728132] panic+0x140/0x30c [7.731184] mount\_block\_root+0x1d0/0x284 [7.735194] mount\_root+0x124/0x158 [7.738683] prepare\_namespace+0x15c/0x1a4 [7.742781] kernel\_init\_freeable+0x234/0x258 [7.747139] kernel\_init+0x10/0xfc [7.750542] ret\_from\_fork+0x10/0x18 [7.754117] SMP: stopping secondary CPUs [7.758041] Kernel Offset: disabled [7.761527] CPU features: 0x0002,20002004 [7.765535] Memory Limit: none [7.768589] —[end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)]— ---
**Author:** ![laifu](https://avatars.discourse-cdn.com/v4/letter/l/d9b06d/32.png) [@laifu](https://discuss.pynq.io/u/laifu)\ **Post date:** [March 11, 2024, 1:55am UTC](https://discuss.pynq.io/t/vfs-unable-to-mount-root-fs-on-unknown-block/6753/2 "2024-03-11T01:55:15Z")
> [@laifu](#): > > INFO: The image(s) were created using OE kickstart file: > /home/cgc/part/PYNQ/sdbuild/boot/image.wks > Num Start End Size Fstype > 1 4096 136318975 136314880 fat16 > 2 137363456 9168549887 9031186432 ext4 > Other answers online said it may be a problem with the partition size. > My SD card is 32g, but it only uses a little bit. How to adjust this partition? I first burn it through the following command: > sudo dd if=./ZCU115-2.7.0.img of=/dev/sdb bs=16MB > Is it useful to then adjust the partition size through gpart? Other answers online said it may be a problem with the partition size. My SD card is 32g, but it only uses a little bit. How to adjust this partition? I first burn it through the following command: sudo dd if=./ZCU115-2.7.0.img of=/dev/sdb bs=16MB Is it useful to then adjust the partition size through gpart? ---
**Author:** ![laifu](https://avatars.discourse-cdn.com/v4/letter/l/d9b06d/32.png) [@laifu](https://discuss.pynq.io/u/laifu)\ **Post date:** [March 11, 2024, 2:04am UTC](https://discuss.pynq.io/t/vfs-unable-to-mount-root-fs-on-unknown-block/6753/3 "2024-03-11T02:04:39Z")
![image](https://us1.discourse-cdn.com/flex019/uploads/pynq1/original/2X/5/5105455051ae1a9ccfe110afbbc4f9f013616869.jpeg) It seems that the burning to the sd card was successful. ---
**Author:** ![laifu](https://avatars.discourse-cdn.com/v4/letter/l/d9b06d/32.png) [@laifu](https://discuss.pynq.io/u/laifu)\ **Post date:** [March 11, 2024, 2:08am UTC](https://discuss.pynq.io/t/vfs-unable-to-mount-root-fs-on-unknown-block/6753/4 "2024-03-11T02:08:53Z")
ARCH\_ZCU115 := aarch64 BSP\_ZCU115 := ZCU115.bsp BITSTREAM\_ZCU115 := base/base.bit FPGA\_MANAGER\_ZCU115 := 1 This is the ZCU115.spec file ---
**Author:** ![laifu](https://avatars.discourse-cdn.com/v4/letter/l/d9b06d/32.png) [@laifu](https://discuss.pynq.io/u/laifu)\ **Post date:** [March 11, 2024, 2:09am UTC](https://discuss.pynq.io/t/vfs-unable-to-mount-root-fs-on-unknown-block/6753/5 "2024-03-11T02:09:29Z")
make PREBUILT=./prebuild/pynq\_rootfs\_aarch64.tar.gz PYNQ\_SDIST=./prebuild/pynq\_sdist.tar.gz BOARDS=ZCU115 This is the compile command ---
**Author:** ![laifu](https://avatars.discourse-cdn.com/v4/letter/l/d9b06d/32.png) [@laifu](https://discuss.pynq.io/u/laifu)\ **Post date:** [March 11, 2024, 2:10am UTC](https://discuss.pynq.io/t/vfs-unable-to-mount-root-fs-on-unknown-block/6753/6 "2024-03-11T02:10:37Z")
> [@laifu](#): > > ZCU115.bsp This is a petalinux bsp built by myself, which has been successfully tested and started