Felix Radensky wrote:

Adrian Hunter wrote:

quoted

Felix Radensky wrote:

quoted

Hi,

I have a strange problem in linux-2.6.31 running on MPC8536DS board.
It is 100% reproducible, by opening a 350MB tar file into ubifs volume
on NAND flash, and starting erase of NOR flash partition right after 
that.

If I don't start  NOR erase, everything works fine. Also, If I run 
sync after
tar, no problem occurs.  The NOR flash is 32MB  Spansion, NAND is
4GB Samsung.

The error messages are as follows:

UBI error: ubi_io_write: error -5 while writing 2048 bytes to PEB 
5812:12288, written 0 bytes
UBI warning: ubi_eba_write_leb: failed to write data to PEB 5812
UBI: recover PEB 5812, move data to PEB 19400
UBI error: ubi_io_read: error -74 while reading 512 bytes from PEB 
5812:512, read 512 bytes
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 
19400:512, written 0 bytes
UBI warning: recover_peb: failed to write to PEB 19400
UBI: try again
UBI: recover PEB 5812, move data to PEB 19401
UBI: run torture test for PEB 19400
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 
19401:512, written 0 bytes
UBI warning: recover_peb: failed to write to PEB 19401
UBI: try again
UBI: recover PEB 5812, move data to PEB 19402
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 
19402:512, written 0 bytes
UBI warning: recover_peb: failed to write to PEB 19402
UBI: try again
UBI: recover PEB 5812, move data to PEB 19403
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 
19403:512, written 0 bytes
UBI warning: recover_peb: failed to write to PEB 19403
UBI warning: ubi_ro_mode: switch to read-only mode
UBIFS error (pid 1149): ubifs_wbuf_write_nolock: cannot write 2522 
bytes to LEB 389:10240, error -5
UBIFS warning (pid 1149): ubifs_ro_mode: switched to read-only mode, 
error -5
UBIFS error (pid 1149): do_writepage: cannot write page 0 of inode 
30708, error -5
UBIFS error (pid 1149): make_reservation: cannot reserve 858 bytes in 
jhead 2, error -30
UBIFS error (pid 1149): do_writepage: cannot write page 2 of inode 
29486, error -30
UBIFS error (pid 1149): make_reservation: cannot reserve 721 bytes in 
jhead 2, error -30
UBIFS error (pid 1149): do_writepage: cannot write page 1 of inode 
30070, error -30
UBI error: ubi_io_write: error -5 while writing 2048 bytes to PEB 
5022:88064, written 0 bytes
UBI warning: ubi_eba_write_leb: failed to write data to PEB 5022
UBI: recover PEB 5022, move data to PEB 19404
UBI error: ubi_io_read: error -74 while reading 512 bytes from PEB 
5022:512, read 512 bytes
UBI error: ubi_io_write: read-only mode
UBI warning: recover_peb: failed to write to PEB 19404
UBI: try again
UBI: recover PEB 5022, move data to PEB 19405
UBI error: ubi_io_write: read-only mode
UBI warning: recover_peb: failed to write to PEB 19405
UBI: try again
UBI: recover PEB 5022, move data to PEB 19406
UBI error: ubi_io_write: read-only mode
UBI warning: recover_peb: failed to write to PEB 19406
UBI: try again
UBI: recover PEB 5022, move data to PEB 19407
UBI error: ubi_io_write: read-only mode
UBI warning: recover_peb: failed to write to PEB 19407
UBIFS error (pid 1044): ubifs_wbuf_sync_nolock: cannot write 2048 
bytes to LEB 788:86016
UBIFS error (pid 1044): ubifs_bg_wbufs_sync: cannot sync 
write-buffer, error -30
UBIFS warning (pid 1044): ubifs_ro_mode: switched to read-only mode, 
error -30
UBI error: ubi_io_write: error -5 while writing 2048 bytes to PEB 
5817:26624, written 0 bytes
UBI warning: ubi_eba_write_leb: failed to write data to PEB 5817
UBI: recover PEB 5817, move data to PEB 19408
UBI error: ubi_io_read: error -74 while reading 512 bytes from PEB 
5817:512, read 512 bytes
UBI error: ubi_io_write: read-only mode
UBI warning: recover_peb: failed to write to PEB 19408
UBI: try again
UBI: recover PEB 5817, move data to PEB 19409
UBI error: ubi_io_write: read-only mode
UBI warning: recover_peb: failed to write to PEB 19409
UBI: try again
UBI: recover PEB 5817, move data to PEB 19410
UBI error: ubi_io_write: read-only mode
UBI warning: recover_peb: failed to write to PEB 19410
UBI: try again
UBI: recover PEB 5817, move data to PEB 19411
UBI error: ubi_io_write: read-only mode
UBI warning: recover_peb: failed to write to PEB 19411
UBIFS error (pid 1047): ubifs_wbuf_sync_nolock: cannot write 2048 
bytes to LEB 385:24576
UBIFS error (pid 1047): ubifs_bg_wbufs_sync: cannot sync 
write-buffer, error -30
UBIFS error (pid 1149): make_reservation: cannot reserve 160 bytes in 
jhead 1, error -30
UBIFS error (pid 1149): ubifs_write_inode: can't write inode 30709, 
error -30
UBIFS error (pid 1149): make_reservation: cannot reserve 160 bytes in 
jhead 1, error -30
UBIFS error (pid 1149): ubifs_write_inode: can't write inode 30710, 
error -30
UBIFS error (pid 1149): make_reservation: cannot reserve 160 bytes in 
jhead 1, error -30
UBIFS error (pid 1149): ubifs_write_inode: can't write inode 30698, 
error -30
UBIFS error (pid 1149): make_reservation: cannot reserve 160 bytes in 
jhead 1, error -30
UBIFS error (pid 1149): ubifs_write_inode: can't write inode 30711, 
error -30

I'd appreciate any hints on what can cause this. Is it a hardware 
problem, mtd layer problem
or UBI problem ?

It sounds like you are saying one MTD partition somehow affects another.
You should check the MTD partitions are set up correctly.  Are you using
tools that make assumptions about which mtd partition is which?

How do you erase the NOR flash?  Is the device node (/dev/mtd...) 
correct?

I can also reproduce the problem by reading from NOR, i.e.

dd if=/dev/mtd4 of=/dev/null

I doubt the problem is in UBI or UBIFS, and plenty of people use multiple
MTD partitions with no problem.

Do the NAND and NOR use the same memory controller?

I don't think I can be much help I'm afraid.