Problem to attach NAND MTD-device to UBI

[Kaius Häggblom]

If I use ubiformat with parameter -s512 I get the device attached, but 
still ubimkvol
fails:

/ # ./ubiformat /dev/mtd4 -s512
ubiformat: mtd4 (NAND), size 134217728 bytes (1280 MiB), 131072 
eraseblocks of 131072 bytes (1280 KiB), min. I/O size 2048 bytes
libscan: scanning eraseblock 1023 -- 100 % complete 
ubiformat: 1021 eraseblocks are supposedly empty
ubiformat: bad eraseblocks: 29, 912, 991
ubiformat: formatting eraseblock 1023 -- 100 % complete 
/ # ubiattach /dev/ubi_ctrl -m4     
UBI: attaching mtd4 to ubi0
UBI: physical eraseblock size:   131072 bytes (128 KiB)
UBI: logical eraseblock size:    129024 bytes
UBI: smallest flash I/O unit:    2048
UBI: sub-page size:              512
UBI: VID header offset:          512 (aligned 512)
UBI: data offset:                2048
UBI: attached mtd4 to ubi0
UBI: MTD device name:            "NAND_Flash 1"
UBI: MTD device size:            128 MiB
UBI: number of good PEBs:        1021
UBI: number of bad PEBs:         3
UBI: max. allowed volumes:       128
UBI: wear-leveling threshold:    4096
UBI: number of internal volumes: 1
UBI: number of user volumes:     0
UBI: available PEBs:             1007
UBI: total number of reserved PEBs: 14
UBI: number of PEBs reserved for bad PEB handling: 10
UBI: max/mean erase counter: 0/0
UBI: background thread "ubi_bgt0d" started, PID 497
UBI device number 0, total 1021 LEBs (131733504 bytes, 1256 MiB), 
available 1007 LEBs (129927168 bytes, 1239 MiB), LEB size 129024 
bytes (1260 KiB)

/ # ubimkvol /dev/ubi0 -m -N "TEST"
Set volume size to 129927168
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 
1023:512, written 0 bytes
UBI warning: ubi_eba_write_leb: failed to write VID header to LEB 
2147479551:0, PEB 1023
UBI: try another PEB
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 
1022:512, written 0 bytes
UBI warning: ubi_eba_write_leb: failed to write VID header to LEB 
2147479551:0, PEB 1022
UBI: try another PEB
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 
1021:512, written 0 bytes
UBI warning: ubi_eba_write_leb: failed to write VID header to LEB 
2147479551:0, PEB 1021
UBI: try another PEB
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 
1020:512, written 0 bytes
UBI warning: ubi_eba_write_leb: failed to write VID header to LEB 
2147479551:0, PEB 1020
UBI warning: ubi_ro_mode: switch to read-only mode
UBI error: ubi_io_write: read-only mode
UBI error: erase_worker: failed to erase PEB 0, error -30
UBI error: do_work: work failed with error code -30
UBI error: ubi_thread: ubi_bgt0d: work failed with error code -30
UBI error: ubi_create_volume: cannot create volume 0, error -30
ubimkvol error: cannot UBI create volume
error 30 (Read-only file system)

r,
kaius