Re: ext2 on flash memory
From: Tomasz Chmielewski
Date: Mon Jun 11 2007 - 07:53:36 EST
Eduard-Gabriel Munteanu wrote:
Your USB pendrive will wear faster if you use an inappropriate
filesystem. Such filesystems require frequent writes and change their
internal state often.
This could be alleviated by COWing the filesystem somehow and flushing
writes when you're finished. But the modifications will be lost if
crashes occur. The filesystem structures will still change a lot and
require big writes to update it.
Really, why don't you try a more suitable fs for your pendrive, one that
changes itself less than usual fs's?
Hmm, are there any fs (read+write) alternatives for pendrives?
jffs2 only works on mtd devices, and that excludes pendrives, which are
block devices. I know LogFS will work with block devices one day, but
currently, it doesn't (and is not in the kernel yet as well).
Also, ext2 provides a nice feature other filesystems lack: xip.
Especially, if a pendrive is used as a rootfs for a small device.
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