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Re: FC4 kernel performance



Alan Cox wrote:

On Wed, Jun 22, 2005 at 08:46:14AM -0500, Chris Adams wrote:


Most things consider a bad sector a sign of a bad drive. On today's
drives, where bad sectors are remapped internally to the drive, by the
time you see a bad sector, the drive has remapped a bunch of sectors
(and may be out of spare space).



Bad sector on write yes - that generally means its time to throw the drive
away, on read its not neccessarily so bad. Thats one reaosn e2fsck will
rewrite inode and other critical blocks that won't read as part of the
recovery


Isn't what RAID1 does already. My understanding was that in case of read error, it retries the read operation on a working mirror and rewrites the failed block. Can anyone confirm or infirm the RAID1 behaviour?


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