Messages in this thread | | | Date | Sun, 20 Apr 2003 13:44:34 -0400 | From | Chuck Ebbert <> | Subject | Re: Are linux-fs's drive-fault-tolerant by concept? |
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>> 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. > > That's interesting. Have you thought of making it read from _both_ > disks and check that the data matches, before passing it back?
It didn't seem to be worth doing, since a userspace program could be written to do the same thing using my small patch. Only problem is, it uses a global sysctl that affects every mirror set in the machine, so it could affect performance of every mirror if used during load.
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