ubifs errors for BeagleBoard

Hi All,

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)

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)

Does anyone encountered similar kind of error?
Also would like to know, does user space - ubitools read only 64 bytes
each from mtd drivers(while scan or format)

Thanks lot for all your helps.

Thanks and Regards,
Shivdas Gujare

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.

Hi Artem,

Thanks a lot for your help.

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.

I am very much newbie to mtd & flash's, Do you mean this is a
non-correctable error caused by hardware?

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

Thanks for pointers, I will follow the tests.

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

Yes.

This is a major stopper for me right now, If ubitools read only 64
bytes from mtd driver,
then how does it handled with when nand page size is 2048. My mtd
driver has a check of

if ( (ops->len % mtd->writesize) != 0) ) {
     printk("%s: : unsupported ops->len, %d\n", __FUNCTION__, ops->len);
                return -EINVAL;
}

So in above case, "ops->len" is set to 64 while ubi "scanning" due to
read of "struct ubi_ec_hdr" & "mtd->writesize" is set to "2048"
so, it always fails while scanning.
Since my MTD knowledge is very limited, I am not sure how this
interfacing happens..Am I missing anything?

Thanks a lot for your help.

Thanks and Regards,
Shivdas Gujare

Hello,

I have the same problem. I ran the mtd tests and have results as this
(for mtd_readtest) :

mtd_readtest: finished with errors
mtd_readtest: error -74 occured.

What do you suggest? What do you think about my NAND driver?

Thanks :slight_smile: