State of read-only filesystems in NAND / MTD bad blocks handling when reading

[Atlant Schmidt]

Artem:

  Thanks!

             Atlant

-----Original Message-----
From: Artem Bityutskiy [mailto:dedekind1 at gmail.com]
Sent: Thursday, May 03, 2012 06:42
To: Atlant Schmidt
Cc: 'Thilo Fromm'; Ricard Wanderlof; linux-mtd at lists.infradead.org
Subject: RE: State of read-only filesystems in NAND / MTD bad blocks handling when reading

On Wed, 2012-05-02 at 13:14 -0400, Atlant Schmidt wrote:
>   I can answer that one.
>
>   MTD "materializes" an imperfect block storage device. It contains
>   m PEBs (Physical Erase Blocks) of n pages each. It can erase whole
>   PEBs, write pages, and read pages, but some of these pages are
>   bad, other pages may go bad, and you have to be aware that you
>   can wear out PEBs by repeated erasures.

Nitpick: s/block device/flash device/ or something like this. Term block
device has more or less standard meaning and neither MTD nor UBI devices
are block devices:

http://www.linux-mtd.infradead.org/faq/general.html#L_mtd_vs_hdd

--
Best Regards,
Artem Bityutskiy

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