UBIFS failure after extended use

[David Lambert]

I am a relative newbie to UBI/MTD but the following puzzles me. I have a 
UBI partition "bulkdata" that suddenly appeared to be corrupted after 
around a week of working perfectly. The kernel is 2.6.30.1 running on an 
Atmel ARM9 ATRM9200. Any suggestions would be very welcome, as I have no 
idea on how to proceed from here.


Best regards,

Dave.

AT91 NAND: 8-bit, Software ECC
Scanning device for bad blocks
Bad eraseblock 347 at 0x0000056c0000
Bad eraseblock 1613 at 0x000019340000
Bad eraseblock 1981 at 0x00001ef40000
Bad eraseblock 2174 at 0x000021f80000
Bad eraseblock 3004 at 0x00002ef00000
Bad eraseblock 3940 at 0x00003d900000
Bad eraseblock 4132 at 0x000040900000
Bad eraseblock 4321 at 0x000043840000
Bad eraseblock 4487 at 0x0000461c0000
Bad eraseblock 4642 at 0x000048880000
Bad eraseblock 5120 at 0x000050000000
Bad eraseblock 5521 at 0x000056440000
Bad eraseblock 5904 at 0x00005c400000
Bad eraseblock 5946 at 0x00005ce80000
Bad eraseblock 6288 at 0x000062400000
Bad eraseblock 6364 at 0x000063700000
Bad eraseblock 6510 at 0x000065b80000
Bad eraseblock 6602 at 0x000067280000
Bad eraseblock 6781 at 0x000069f40000
Bad eraseblock 6861 at 0x00006b340000
Bad eraseblock 7144 at 0x00006fa00000
Bad eraseblock 7223 at 0x000070dc0000
Bad eraseblock 7344 at 0x000072c00000
Bad eraseblock 7432 at 0x000074200000
Bad eraseblock 7997 at 0x00007cf40000
Creating 2 MTD partitions on "NAND 2GiB 3,3V 8-bit":
0x000000000000-0x000006400000 : "ubirootfs"
0x000006400000-0x000080000000 : "bulkdata"
UBI: attaching mtd4 to ubi0
UBI: physical eraseblock size:   262144 bytes (256 KiB)
UBI: logical eraseblock size:    258048 bytes
UBI: smallest flash I/O unit:    4096
UBI: sub-page size:              1024
UBI: VID header offset:          1024 (aligned 1024)
UBI: data offset:                4096
UBI: attached mtd4 to ubi0
UBI: MTD device name:            "ubirootfs"
UBI: MTD device size:            100 MiB
UBI: number of good PEBs:        399
UBI: number of bad PEBs:         1
UBI: max. allowed volumes:       128
UBI: wear-leveling threshold:    4096
UBI: number of internal volumes: 1
UBI: number of user volumes:     1
UBI: available PEBs:             0
UBI: total number of reserved PEBs: 399
UBI: number of PEBs reserved for bad PEB handling: 3
UBI: max/mean erase counter: 3/0
UBI: background thread "ubi_bgt0d" started, PID 264

UBI: attaching mtd5 to ubi1
UBI: physical eraseblock size:   262144 bytes (256 KiB)
UBI: logical eraseblock size:    258048 bytes
UBI: smallest flash I/O unit:    4096
UBI: sub-page size:              1024
UBI: VID header offset:          1024 (aligned 1024)
UBI: data offset:                4096
UBI: attached mtd5 to ubi1
UBI: MTD device name:            "bulkdata"
UBI: MTD device size:            1948 MiB
UBI: number of good PEBs:        7768
UBI: number of bad PEBs:         24
UBI: max. allowed volumes:       128
UBI: wear-leveling threshold:    4096
UBI: number of internal volumes: 1
UBI: number of user volumes:     1
UBI: available PEBs:             0
UBI: total number of reserved PEBs: 7768
UBI: number of PEBs reserved for bad PEB handling: 77
UBI: max/mean erase counter: 8306/75
UBI: background thread "ubi_bgt1d" started, PID 355
UBI device number 1, total 7768 LEBs (2004516864 bytes, 1.9 GiB), 
available 0 LEBs (0 bytes), LEB size 258048 bytes (252.0 KiB)
UBIFS: recovery needed
UBIFS: recovery completed
UBIFS: mounted UBI device 1, volume 0, name "bulkdata"
UBIFS: file system size:   1980260352 bytes (1933848 KiB, 1888 MiB, 7674 
LEBs)
UBIFS: journal size:       33546240 bytes (32760 KiB, 31 MiB, 130 LEBs)
UBIFS: media format:       w4/r0 (latest is w4/r0)
UBIFS: default compressor: none
UBIFS: reserved for root:  4952683 bytes (4836 KiB)

All seems OK up to here - then all hell breaks loose...

# uncorrectable error : <3>UBI error: ubi_io_read: error -74 while 
reading 13 bytes from PEB 718:175672, read 13 bytes
UBIFS error (pid 85): make_reservation: cannot reserve 4144 bytes in 
jhead 2, error -74
UBIFS error (pid 85): do_writepage: cannot write page 1981 of inode 
6925, error -74
UBIFS warning (pid 85): ubifs_ro_mode: switched to read-only mode, error 
-74
UBIFS error (pid 85): make_reservation: cannot reserve 160 bytes in 
jhead 1, error -30
UBIFS error (pid 85): ubifs_write_inode: can't write inode 6925, error -30
UBIFS error (pid 420): make_reservation: cannot reserve 4144 bytes in 
jhead 2, error -30
UBIFS error (pid 420): do_writepage: cannot write page 1982 of inode 
6925, error -30
UBIFS error (pid 420): make_reservation: cannot reserve 4144 bytes in 
jhead 2, error -30
UBIFS error (pid 420): do_writepage: cannot write page 1983 of inode 
6925, error -30
UBIFS error (pid 420): make_reservation: cannot reserve 4144 bytes in 
jhead 2, error -30
UBIFS error (pid 420): do_writepage: cannot write page 1984 of inode 
6925, error -30
UBIFS error (pid 420): make_reservation: cannot reserve 4144 bytes in 
jhead 2, error -30
UBIFS error (pid 420): do_writepage: cannot write page 1985 of inode 
6925, error -30
UBIFS error (pid 420): make_reservation: cannot reserve 4144 bytes in 
jhead 2, error -30
UBIFS error (pid 420): do_writepage: cannot write page 1986 of inode 
6925, error -30
UBIFS error (pid 420): make_reservation: cannot reserve 4144 bytes in 
jhead 2, error -30
UBIFS error (pid 420): do_writepage: cannot write page 1987 of inode 
6925, error -30
UBIFS error (pid 420): make_reservation: cannot reserve 4144 bytes in 
jhead 2, error -30
UBIFS error (pid 420): do_writepage: cannot write page 1988 of inode 
6925, error -30
UBIFS error (pid 420): make_reservation: cannot reserve 4144 bytes in 
jhead 2, error -30
UBIFS error (pid 420): do_writepage: cannot write page 1989 of inode 
6925, error -30
UBIFS error (pid 420): make_reservation: cannot reserve 4144 bytes in 
jhead 2, error -30
UBIFS error (pid 420): do_writepage: cannot write page 1990 of inode 
6925, error -30
UBIFS error (pid 85): make_reservation: cannot reserve 4144 bytes in 
jhead 2, error -30
UBIFS error (pid 85): do_writepage: cannot write page 1991 of inode 
6925, error -30