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May-28-11 01:24:38
Gilles
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[SOLVED] How to create new Ubifs partition?

Hello

After messing with Jffs2 on the Atcom IP01, it turns out that I should use Ubifs instead to format the mtd2 partition on the NAND (mtd0 = root fs in RAM, mtd1 = kernel).

So I followed the Unsorted Block Image File System (UBIFS) document in the Blackfin wiki, but get the following error after successfully running "ubiformat /dev/mtd4 -s 512 -O 512":

Code:

ip01> ls -al /dev/ub*

crw-r--r--    1 root     root      253,   0 May 27  2011 /dev/ubi0

crw-r--r--    1 root     root       10,  63 May 27  2011 /dev/ubi_ctrl

ip01>

ip01> ubiattach /dev/ubi_ctrl -m 2

UBI: attaching mtd2 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 mtd2 to ubi0

UBI: MTD device name:            "file system(nand)"

UBI: MTD device size:            248 MiB

UBI: number of good PEBs:        1984

UBI: number of bad PEBs:         0

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:             1961

UBI: total number of reserved PEBs: 23

UBI: number of PEBs reserved for bad PEB handling: 19

UBI: max/mean erase counter: 1/0

UBI: image sequence number: 0

UBI: background thread "ubi_bgt0d" started, PID 46

UBI device number 0, total 1984 LEBs (255983616 bytes, 244.1 MiB), available 1961 LEBs (253016064 bytes, 241.3 MiB), LEB size 129024 bytes (126.0 KiB)

ip01>

ip01> ubimkvol /dev/ubi0 -s 20MiB -N ubifs0

libubi: error!: "/dev/ubi0" has major:minor 253:0, but this does not correspond to any UBI device or volume

ubimkvol: error!: "/dev/ubi0" is not an UBI device node

ip01>

Does someone know what is causing that error?

Thank you.


Edited By:  Gilles
Jun-10-11 15:31:36

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May-28-11 11:58:59
admin
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Re: [SOLVED] How to create new Ubifs partition?

Hi Gilles,

It seems your /dev/ubi0 is not in sync with the sysfs.
Check what major:minor report by ybiinfo and make a corresponding nod in /dev/

Cheers
Dimitar

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May-28-11 19:24:05
Gilles
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Re: [SOLVED] How to create new Ubifs partition?

Thanks Dimitar. I actually used the device_table.txt from Switchfin, and uncommented the two relevant lines:

Code:


#UBIFS nodes

/dev/ubi_ctrl    c    644    0    0    10    63    0    0    -

/dev/ubi0    c    644    0    0    253    0    0    0    -

Does it mean that Switchfin uses mdev + device_table-min.txt and creates device nodes at run-time?

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May-30-11 18:32:07
Gilles
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Re: [SOLVED] How to create new Ubifs partition?

I'm getting closed. Using mdev + dynamic dev nodes, I'm getting all the way to "ubimkvol /dev/ubi0 -m -N ubifs0", which stops with error "UBI device does not have free logical eraseblocks".

It looks like I'm using wrong settings, but I don't know what to use in mkfs.ubifs, ubinize, the MTD partition, and ubiformat.

On workstation

Code:


# /usr/src/uClinux-dist-2010R1-RC5/user/mtd-utils/mkfs.ubifs --squash-uids -m 2048 -e 204800 -c 1024 -d /usr/src/uClinux-dist-2010R1-RC5/romfs -D device_table-min.txt -o /usr/src/uClinux-dist-2010R1-RC5/images/rootfs.ubifs



# vi ubi.cfg

[ubifs]

mode=ubi

image=./images/rootfs.ubifs

vol_id=0

#vol_size field must be larger than UBIFS image,

#but smaller than total flash space

;4.915.200 images/rootfs.ubifs

;

;mtd2: 0f800000 00020000 "file system(nand)"

;f800000 = 260.046.848

vol_size=200MiB

vol_type=dynamic

vol_name=rootfs

vol_flags=autoresize



# ubinize -o ubi.img -m 2048 -p 128KiB -s 512 ubi.cfg



# mv ubi.img /var/www/

On Atcom

Code:


# wget -c http://workstation/ubi.img



# ubiformat /dev/mtd2 -s 512 -f ubi.img

           

> ubiattach /dev/ubi_ctrl -m 2

UBI: attaching mtd2 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: volume 0 ("rootfs") re-sized from 1626 to 1961 LEBs

UBI: attached mtd2 to ubi0

UBI: MTD device name:            "file system(nand)"

UBI: MTD device size:            248 MiB

UBI: number of good PEBs:        1984

UBI: number of bad PEBs:         0

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: 1984

UBI: number of PEBs reserved for bad PEB handling: 19

UBI: max/mean erase counter: 10/5

UBI: image sequence number: 364645537

mtd: Giving out device 3 to rootfs

UBI: background thread "ubi_bgt0d" started, PID 69

UBI device number 0, total 1984 LEBs (255983616 bytes, 244.1 MiB), available 0 LEBs (0 bytes), LEB size 129024 bytes (126.0 KiB)



# mdev -s

# ubinfo /dev/ubi0 -a

ubi0:

Volumes count:                           1

Logical eraseblock size:                 129024

Total amount of logical eraseblocks:     1984 (255983616 bytes, 244.1 MiB)

Amount of available logical eraseblocks: 0 (0 bytes)

Maximum count of volumes                 128

Count of bad physical eraseblocks:       0

Count of reserved physical eraseblocks:  19

Current maximum erase counter value:     11

Minimum input/output unit size:          2048 bytes

Character device major/minor:            251:0

Present volumes:                         0



Volume ID:   0 (on ubi0)

Type:        dynamic

Alignment:   1

Size:        1961 LEBs (253016064 bytes, 241.3 MiB)

State:       OK

Name:        rootfs

Character device major/minor: 251:1



# ubimkvol /dev/ubi0 -m -N ubifs0

ubimkvol: error!: UBI device does not have free logical eraseblocks

Any help appreciated.

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May-31-11 12:05:41
admin
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Re: [SOLVED] How to create new Ubifs partition?

Hi Gilles,

Probably you can just get the latest Switchfin SVN trunk and test on your IP01.
It should work now.

Best Regards
Dimitar

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Jun-10-11 15:30:48
Gilles
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Re: [SOLVED] How to create new Ubifs partition?

Problem solved. Make sure you use the right settings for mkfs.ubifs, leave enough room in ubi.cfg.

I guess mdev is only needed when mouting a Ubifs partition manually, ie. not when booting.

I don't know what ubimkvol is for.

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