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Ext3 and write caching by drives are the data killers...

Ext3 and write caching by drives are the data killers...

Posted Sep 2, 2009 6:36 UTC (Wed) by Cato (subscriber, #7643)
In reply to: Ext3 and write caching by drives are the data killers... by dlang
Parent article: Ext3 and RAID: silent data killers?

I grepped the 2.6.24 sources, fs/ext3/*.c and fs/jbd/*.c, for any mention of checksum, and couldn't find it. However the email lists do have some reference to a journal checksum patch for ext3 that didn't make it into 2.6.25.

One other thought: perhaps LVM is bad for data integrity with ext3 because, as well as stopping barriers from working, LVM generates more fragmentation in the ext3 journal - that's one of the conditions mentioned by Ted Tso as potentially causing write reordering and hence FS corruption here: http://linux.derkeiler.com/Mailing-Lists/Kernel/2008-05/m...


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