UBI 1MiB size partition

[Angelo Dureghello]

Dear all,

i read UBI faq and surfed the net, but can't find still a clear answer
to this:


I have a 1MiB partition on a nand flash o would like to format as UBI.
I already have the rootfs atrtached as UBI0 / UBI0_0, so i am going
to attach this partition as UBI1.

But with the available ubi commands i am not able. Is this a limitiation
due to the small partition size ?

[root at barix ~]# flash_erase /dev/mtd5 0 8
Erasing 128 Kibyte @ e0000 -- 100 % complete

[root at barix ~]# ubiattach -m 5
UBI: attaching mtd5 to ubi1
UBI: scanning is finished
UBI: empty MTD device detected
UBI warning: print_rsvd_warning: cannot reserve enough PEBs for bad PEB 
handling, reserved 4, need 20
UBI: attached mtd5 (name "config", size 1 MiB) to ubi1
UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
UBI: VID header offset: 2048 (aligned 2048), data offset: 4096
UBI: good PEBs: 8, bad PEBs: 0, corrupted PEBs: 0
UBI: user volume: 0, internal volumes: 1, max. volumes count: 128
UBI: max/mean erase counter: 0/0, WL threshold: 4096, image sequence 
number: 193419012
UBI: available PEBs: 0, total reserved PEBs: 8, PEBs reserved for bad 
PEB handling: 4
UBI: background thread "ubi_bgt1d" started, PID 2686
UBI device number 1, total 8 LEBs (1015808 bytes, 992.0 KiB), available 
0 LEBs (0 bytes), LEB size 126976 bytes (124.0 KiB)
[root at barix ~]#

[root at barix ~]# ubimkvol /dev/ubi1 -N config -m
ubimkvol: error!: UBI device does not have free logical eraseblocks

As you see, i can't create a volume so i cannot mount.
 From the tools help, seems i cannot set bad PEB handling count.

Every help is very appreciated.
Thanks
angelo