Bad Block Table support when using UBI

Bad Block Table support when using UBI

[Torsten Fleischer]

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Hi all,

I've tested UBI and UBIFS on the eval board MPC8313ERDB. This board 
contains a 32 MiB NAND Flash (SLC small block).
The fsl_elbc_nand driver that is used for the MPC8313's NAND flash 
interface reserves 4 erase blocks at the end of the device
for the bad block table.

Do I need the bad block table support when using UBI?

Best regards
Torsten Fleischer



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Re: Bad Block Table support when using UBI

[Artem Bityutskiy]

On Thu, 2009-02-19 at 07:07 +0100, Torsten Fleischer wrote:
> This e-mail is confidential and may contain privileged information. If
> you have received this communication in error, please notify us
> immediately by responding to this email and then delete it from your
> system. The sender therefore does not accept liability for any errors
> or omissions in the contents of this message which arise as a result
> of e-mail transmission. We believe but do not warrant that this e-mail
> and any attachments are virus free. You must therefore take full
> responsibility for virus checking. 

According to your disclaimer I'm notifying you that some intruder from
your company sent this e-mail to a public mailing list, please fire him.
I'm deleting this e-mail from my mailbox as your disclaimer asks me to
do, but unfortunately it is archived and you would have to pay piles of
money to remove it from the mailing list archives.

Seriously, vs. bad block table: UBI does not have it's own block table,
and it asks this information from the driver. So probably it is ok for
the driver to store the BBT, although your flash is not big, so simple
scanning and building BBT in RAM would save you some flash space.

-- 
Best regards,
Artem Bityutskiy (Битюцкий Артём)