Re: Ext2/3 Filesystem Analysis

From: Alan Cox
Date: Wed Jun 09 2010 - 05:49:28 EST

> With Ext3:
> Filesystem block at Sector 0 is being updated more frequently at ratio
> of 5.5 to 6 times that of data block.
> Filesystem block(super block copies) are being updated at around
> 1.5times the frequency compared to data block.
> Has anyone come across this kind of behaviour with these filesystems
> on NAND Flash?

ext2/3 are not intended to be used with flash - they do not wear level,
in fact the journal and some other blocks will get very heavily used
compared to other blocks.

See the MTD drivers and related file systems/mapping layers (UBIFS etc)
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