| From: | Sam Mason <sam(at)samason(dot)me(dot)uk> |
|---|---|
| To: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: embedded pgsql media-failure |
| Date: | 2009-02-03 17:10:09 |
| Message-ID: | 20090203171008.GQ3008@frubble.xen.chris-lamb.co.uk |
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| Lists: | pgsql-general |
On Wed, Feb 04, 2009 at 12:35:33AM +0900, Craig Ringer wrote:
> BTW, I'm not sure how much good OS-level RAID on a single device will do
> for you. Linux will try to reset the interface to the drive on I/O
> errors, will hang for long periods waiting for reads, etc and I wouldn't
> be at all surprised if this caused `md' to think that both "devices"
> (partitions) were failed.
Interesting, hadn't thought of that!
> It also won't help you if the card's interface
> fails, the CF adapter fails, etc. Surely you'd be better off with *TWO*
> CF cards in RAID if you really want redundancy and reliability?
But the flash storage is the part that's known to degrade with use, if
you start worrying about the card's interface then why not the PCI bus
it's hung off?
--
Sam http://samason.me.uk/
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