ubifs errors for BeagleBoard

[Artem Bityutskiy]

On Mon, 2010-02-15 at 00:53 -0800, Shivdas Gujare wrote:
> Hi All,

Good morning,

> I am trying to use UBIFS on Omap3 BeagleBoard (kernel version 2.6.33)
> I am quite new to flash filesystems & ubifs.
> 
> currently for ubiattach I am getting following error,
> 
> uncorrectable error :
> UBI error: ubi_io_read: error -74 while reading 512 bytes from PEB
> 198:512, read 512 bytes
> [<c002e444>] (unwind_backtrace+0x0/0xdc) from [<c0217ddc>]
> (ubi_io_read+0x20c/0x2ec)
> [<c0217ddc>] (ubi_io_read+0x20c/0x2ec) from [<c0218048>]
> (ubi_io_read_vid_hdr+0x94/0x294)
> [<c0218048>] (ubi_io_read_vid_hdr+0x94/0x294) from [<c021cbf4>]
> (ubi_scan+0xa50/0x1094)
> [<c021cbf4>] (ubi_scan+0xa50/0x1094) from [<c02122f4>]
> (ubi_attach_mtd_dev+0x624/0xd6c)
> [<c02122f4>] (ubi_attach_mtd_dev+0x624/0xd6c) from [<c0212cd8>]
> (ctrl_cdev_ioctl+0xe8/0x1a4)
> [<c0212cd8>] (ctrl_cdev_ioctl+0xe8/0x1a4) from [<c00aa590>]
> (vfs_ioctl+0x2c/0x70)
> [<c00aa590>] (vfs_ioctl+0x2c/0x70) from [<c00aacc4>] (do_vfs_ioctl+0x518/0x55c)
> [<c00aacc4>] (do_vfs_ioctl+0x518/0x55c) from [<c00aad3c>] (sys_ioctl+0x34/0x54)
> [<c00aad3c>] (sys_ioctl+0x34/0x54) from [<c0028de0>] (ret_fast_syscall+0x0/0x2c)

-74 is -EBADMSG, which means an non-correctable ECC error.

> 
> and for "mount -t ubifs /dev/ubi0_0 /mnt" it gives following error,
> 
> uncorrectable error :
> UBI error: ubi_io_read: error -74 while reading 188 bytes from PEB
> 220:8304, read 188 bytes
> [<c002e444>] (unwind_backtrace+0x0/0xdc) from [<c0217ddc>]
> (ubi_io_read+0x20c/0x2ec)
> [<c0217ddc>] (ubi_io_read+0x20c/0x2ec) from [<c0216fd4>]
> (ubi_eba_read_leb+0x2e4/0x3e8)
> [<c0216fd4>] (ubi_eba_read_leb+0x2e4/0x3e8) from [<c0214c24>]
> (ubi_leb_read+0x100/0x15c)
> [<c0214c24>] (ubi_leb_read+0x100/0x15c) from [<c015d604>]
> (ubifs_read_node+0x1b4/0x340)
> [<c015d604>] (ubifs_read_node+0x1b4/0x340) from [<c017d9b0>]
> (ubifs_load_znode+0xd0/0x5c0)
> [<c017d9b0>] (ubifs_load_znode+0xd0/0x5c0) from [<c016136c>]
> (ubifs_lookup_level0+0x114/0x2dc)
> [<c016136c>] (ubifs_lookup_level0+0x114/0x2dc) from [<c0162e74>]
> (ubifs_tnc_locate+0x40/0x170)
> [<c0162e74>] (ubifs_tnc_locate+0x40/0x170) from [<c0158d00>]
> (ubifs_iget+0xb0/0x7e4)
> [<c0158d00>] (ubifs_iget+0xb0/0x7e4) from [<c015aa08>]
> (ubifs_fill_super+0x15d4/0x1664)
> [<c015aa08>] (ubifs_fill_super+0x15d4/0x1664) from [<c015ad20>]
> (ubifs_get_sb+0x288/0x2fc)
> [<c015ad20>] (ubifs_get_sb+0x288/0x2fc) from [<c009fd24>]
> (vfs_kern_mount+0x4c/0xd0)
> [<c009fd24>] (vfs_kern_mount+0x4c/0xd0) from [<c009fdec>]
> (do_kern_mount+0x34/0xd8)
> [<c009fdec>] (do_kern_mount+0x34/0xd8) from [<c00b4640>] (do_mount+0x5ec/0x64c)
> [<c00b4640>] (do_mount+0x5ec/0x64c) from [<c00b4724>] (sys_mount+0x84/0xc4)
> [<c00b4724>] (sys_mount+0x84/0xc4) from [<c0028de0>] (ret_fast_syscall+0x0/0x2c)

The same symptoms.

> Does anyone encountered similar kind of error?
Yes in general, dunno if for beagleboard.

Please, start with validating your flash using mtd-tests. You have
issues somewhere on the NAND driver level. Please, find the tests here:

http://www.linux-mtd.infradead.org/doc/general.html#L_mtd_tests

> Also would like to know, does user space - ubitools read only 64 bytes
> each from mtd drivers(while scan or format)

Yes.

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)