SanDisk micro SDHC 8GB card under testing

Joe Pfeiffer joseph at
Fri Jul 11 23:17:45 CEST 2008

Andrew Bennett writes:
>> On Fri, Jul 11, 2008 at 1:47 PM, ian douglas <ian.douglas at>
>> wrote:
>> Federico Lorenzi wrote:
>> > Makes sense, ext3 is journaled, and using a journaling FS on flash
>> > memory is generally a bad idea. Could you also try ext2?
>> Sorry, I'm not up to speed on flash and file systems -- why is a
>> journaled file system a bad idea?
>> Journaled file systems perform lots of extra writes to the drive.  Flash
>drives wear out a little quicker (in terms of writes) than other drives.
>Putting the two together means you're probably decreasing the length of your
>drive's life.

Well...  using an inode-based filesystem like ext2 or ext3 is a really
bad idea, since you end up rewriting some of the blocks a *lot*.
Journalling the metadata, as ext3 does it, does make things even worse
as you say.  Using a purely journalled FS like jffs2, on the other
hand, is a really good idea since it's designed to avoid exactly those

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