Re: Are linux-fs's drive-fault-tolerant by concept?

From: Chuck Ebbert (76306.1226@compuserve.com)
Date: Sun Apr 20 2003 - 12:03:02 EST


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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