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SubjectRe: Are linux-fs's drive-fault-tolerant by concept?
arjan wrote:


>> You will if it writes and fails to read back. The disk can't invent a
>> sector that is gone.
>
> but linux can if you use an raid1 mirror... maybe we should teach the md
> layer to write back the data from the other disk on a "bad sector"
> error.


I have some ugly code that forces all reads from a mirror set to
a specific copy, set via a global sysctl. This lets you do things
like make a backup from disk 0, then verify against disk 1 and take
action if something is wrong.


------
Chuck
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