Thanks.  Some success, but not complete.  I get past the ubiformat ok, but the mount fails.

What about ubiattach and ubimkvol?  I tried them too after the ubiformat, without any success either.

no, I have not used UBI before.  The only tools I know of are the ones in the mtd package;

ubiformat,  ubiattach, ubidetach,   ubimkvol, ubinfo etc.


 

Tried that already, quie a few times!  Is this an indication of bad hardware?

I am following the instructions to install Debian to Flash and got as far as to set up the UBI;

Convert internal flash root partition to UBIFS

   ubiformat /dev/mtd2 -s 512
   ubiattach /dev/ubi_ctrl -m 2
   ubimkvol /dev/ubi0 -N rootfs -m
   mount -t ubifs ubi0:rootfs /mnt

However, the ubimkvol command returns errors (see below) in all variations I have tried.  Any suggestions?

some info:
----------
uname -a
Linux debianplug 2.6.32-trunk-kirkwood #1 Mon Jan 11 10:57:12 UTC 2010 armv5tel GNU/Linux


debianplug:/dev# ubinfo --all
UBI version:                    1
Count of UBI devices:           1
UBI control device major/minor: 10:62
Present UBI devices:            ubi0

ubi0
Volumes count:                           0
Logical eraseblock size:                 129024 bytes, 126.0 KiB
Total amount of logical eraseblocks:     4055 (523192320 bytes, 499.0 MiB)
Amount of available logical eraseblocks: 4011 (517515264 bytes, 493.5 MiB)
Maximum count of volumes                 128
Count of bad physical eraseblocks:       1
Count of reserved physical eraseblocks:  40
Current maximum erase counter value:     18
Minimum input/output unit size:          2048 bytes
Character device major/minor:            252:0
debianplug:/dev#

result:
-------

debianplug:/dev# ubimkvol /dev/ubi0 -N"rootfs" -s490MiB
[ 3491.439972] UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 0:512, written 0 bytes
[ 3491.449102] UBI warning: ubi_eba_write_leb: failed to write VID header to LEB 2147479551:0, PEB 0
[ 3491.458809] UBI: try another PEB
[ 3491.462240] UBI: run torture test for PEB 0
[ 3491.467051] UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 4055:512, written 0 bytes
[ 3491.476423] UBI warning: ubi_eba_write_leb: failed to write VID header to LEB 2147479551:0, PEB 4055
[ 3491.511568] UBI: try another PEB
[ 3491.686891] UBI: PEB 0 passed torture test, do not mark it a bad
[ 3491.695949] UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 4051:512, written 0 bytes
[ 3491.705328] UBI warning: ubi_eba_write_leb: failed to write VID header to LEB 2147479551:0, PEB 4051
[ 3491.715051] UBI: run torture test for PEB 4055
[ 3491.731852] UBI: try another PEB
[ 3491.913343] UBI: PEB 4055 passed torture test, do not mark it a bad
[ 3491.922647] UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 0:512, written 0 bytes
[ 3491.931768] UBI warning: ubi_eba_write_leb: failed to write VID header to LEB 2147479551:0, PEB 0
[ 3491.941238] UBI: run torture test for PEB 4051
[ 3491.958377] UBI warning: ubi_ro_mode: switch to read-only mode
[ 3491.972541] UBI error: ubi_create_volume: cannot create volume 0, error -30
ubimkvol: error!: cannot UBI create volume
          error 30 (Read-only file system)
debianplug:/dev# [ 3492.036981] UBI error: ubi_io_write: read-only mode
[ 3492.041908] UBI error: erase_worker: failed to erase PEB 4051, error -30
[ 3492.048643] UBI error: do_work: work failed with error code -30
[ 3492.054601] UBI error: ubi_thread: ubi_bgt0d: work failed with error code -30