U-Boot and Kernel not recognizing ubi file system

JohnKlug — Wed, 31 Mar 2021 18:27:09 GMT

I am using Yocto Zeus with 5.4 kernel and u-boot 2020.04.

I build the ubi image, and the only message I see from ubinize is:

ubinize: volume size was not specified in section "ubifs", assume minimum to fit image.

In U-Boot:

=> ubi part nandrootfs ubi0: attaching mtd7 ubi0: scanning is finished ubi0: volume table was restored ubi0: volume 0 ("imx6ull14x14evk-rootfs") re-sized from 290 to 1916 LEBs ubi0: attached mtd7 (name "nandrootfs", size 490 MiB) ubi0: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes ubi0: min./max. I/O unit sizes: 4096/4096, sub-page size 4096 ubi0: VID header offset: 4096 (aligned 4096), data offset: 8192 ubi0: good PEBs: 1956, bad PEBs: 4, corrupted PEBs: 0 ubi0: user volume: 1, internal volumes: 1, max. volumes count: 128 ubi0: max/mean erase counter: 1/0, WL threshold: 4096, image sequence number: 159654406 ubi0: available PEBs: 0, total reserved PEBs: 1956, PEBs reserved for bad PEB handling: 36

I know the device has 4 blocks marked bad.

Layout:

=> ubi info layout Volume information dump: vol_id 0 reserved_pebs 1916 alignment 1 data_pad 0 vol_type 3 name_len 22 usable_leb_size 253952 used_ebs 1916 used_bytes 486572032 last_eb_bytes 253952 corrupted 0 upd_marker 0 skip_check 0 name imx6ull14x14evk-rootfs Volume information dump: vol_id 2147479551 reserved_pebs 2 alignment 1 data_pad 0 vol_type 3 name_len 13 usable_leb_size 253952 used_ebs 2 used_bytes 507904 last_eb_bytes 2 corrupted 0 upd_marker 0 skip_check 0 name layout volume

Mount result:

=> ubifsmount ubi0:imx6ull14x14evk-rootfs UBIFS error (ubi0:0 pid 0): ubifs_read_node: bad node type (255 but expected 6) UBIFS error (ubi0:0 pid 0): ubifs_read_node: bad node at LEB 0:0, LEB mapping status 0 Not a node, first 24 bytes:Error reading superblock on volume 'ubi0:imx6ull14x14evk-rootfs' errno=-22! ubifsmount - mount UBIFS volume Usage: ubifsmount <volume-name> - mount 'volume-name' volume

Kernel:

[ 2.495649] ubi0: default fastmap pool size: 95 [ 2.500225] ubi0: default fastmap WL pool size: 47 [ 2.505216] ubi0: attaching mtd6 [ 3.056892] ubi0: scanning is finished [ 3.072096] ubi0 warning: ubi_eba_init: cannot reserve enough PEBs for bad PEB handling, reserved 34, need 36 [ 3.085277] ubi0: attached mtd6 (name "nandrootfs", size 490 MiB) [ 3.091421] ubi0: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes [ 3.098413] ubi0: min./max. I/O unit sizes: 4096/4096, sub-page size 4096 [ 3.105337] ubi0: VID header offset: 4096 (aligned 4096), data offset: 8192 [ 3.112327] ubi0: good PEBs: 1956, bad PEBs: 4, corrupted PEBs: 0 [ 3.118481] ubi0: user volume: 1, internal volumes: 1, max. volumes count: 128 [ 3.125852] ubi0: max/mean erase counter: 2/0, WL threshold: 4096, image sequence number: 159654406 [ 3.134966] ubi0: available PEBs: 0, total reserved PEBs: 1956, PEBs reserved for bad PEB handling: 34 [ 3.144319] ubi0: background thread "ubi_bgt0d" started, PID 114 ... [ 3.343148] (driver?) [ 3.349749] 1f06 501760 mtdblock6 [ 3.349755] (driver?) [ 3.356337] No filesystem could mount root, tried: [ 3.356341] ubifs [ 3.361228] [ 3.364747] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 3.373038] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---

Re: U-Boot and Kernel not recognizing ubi file system

igorpadykov — Thu, 01 Apr 2021 00:27:19 GMT

Hi John

for that issue one can recheck nand programming procedure, for example

https://variwiki.com/index.php?title=Yocto_NAND_Flash_Burning

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/How-To-use-NAND-boot-on-i-MX6UL-EVK-board/ta-p/1116178

Best regards
igor

Re: U-Boot and Kernel not recognizing ubi file system

JohnKlug — Thu, 01 Apr 2021 00:55:01 GMT

I found the following useful information on ubifs:

http://www.linux-mtd.infradead.org/faq/ubifs.html#L_mkfubifs

In order to create the ubifs successfully you need parameters set for the NAND. I was able to boot from SD card and inspect my NAND with:

mtdinfo /dev/mtd0 -u

I was then able to set the following ubifs parameters in my conf/machine/${MACHINE} file:

MKUBIFS_ARGS = "-m 4096 -e 253952 -c 1932" UBINIZE_ARGS = "-p 256KiB -m 4096"

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U-Boot and Kernel not recognizing ubi file system

Re: U-Boot and Kernel not recognizing ubi file system

Re: U-Boot and Kernel not recognizing ubi file system