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Date: Tue, 15 Jun 2010 19:35:07 +0530
From: Philby John <pjohn@mvista.com>
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Subject: Re: UBIFS mount failure on NOR flash
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On 06/15/2010 07:07 PM, Artem Bityutskiy wrote:
> On Tue, 2010-06-15 at 18:29 +0530, Philby John wrote:
>> Hello,
>>
>> Platform: Cavium CN5020
>> Filesystem: UBIFS
>> Flash Type: NOR
>> Flash Size: 8MB
>> Partition Details Kernel Log:
>> Creating 2 MTD partitions on "phys_mapped_flash":
>> 0x000000000000-0x000000700000 : "Octeon BOOT partition"
>> 0x000000700000-0x000000800000 : "Octeon test partition"
>>
>>
>> $mount -t ubifs ubi1:test /mnt/nor
>> UBIFS error (pid 851): init_constants_early: too few LEBs (12), min. is 17
>> mount: wrong fs type, bad option, bad superblock on ubi1:test,
>>         missing codepage or helper program, or other error
>>         (for several filesystems (e.g. nfs, cifs) you might
>>         need a /sbin/mount.<type>  helper program)
>>         In some cases useful info is found in syslog - try
>>         dmesg | tail  or so
>>
>>
>> But JFFS2 is able to mount the same partition flawlessly. Shouldn't
>> UBIFS be able to do the same? What I would like to know is, is this the
>> expected behavior or a bug? If its a bug I would like to look into it.
>
> Yes, this is expected. For such a tiny flash partition you should rather
> use JFFS2. I've just created a FAQ entry for you:
>
> http://www.linux-mtd.infradead.org/faq/ubifs.html#L_few_lebs
>

Okay, thanks for the clarification.

Regards,
Philby