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<TITLE>RE: [Beowulf] Surviving a double disk failure</TITLE>
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<P><FONT SIZE=2>raid6 is also new code with new bugs that can lead to dataloss as well, regardless of its nice 'can survive<BR>
two drive failures' feature. I have seen it happen.<BR>
<BR>
Michael<BR>
<BR>
-----Original Message-----<BR>
From: beowulf-bounces@beowulf.org on behalf of Orion Poplawski<BR>
Sent: Fri 4/10/2009 10:23 AM<BR>
To: landman@scalableinformatics.com<BR>
Cc: Beowulf List<BR>
Subject: Re: [Beowulf] Surviving a double disk failure<BR>
<BR>
Joe Landman wrote:<BR>
> Stuart Midgley wrote:<BR>
><BR>
> Good work Stuart!<BR>
><BR>
>> What are the lessons learnt? Well with software raid Linux is both your<BR>
><BR>
> 1) Use RAID6. It is your friend. RAID5 is unashamedly your enemy.<BR>
<BR>
So, what's a reasonably limit on the number of disks in a RAID6 array<BR>
using 1.5TB disks?<BR>
<BR>
--<BR>
Orion Poplawski<BR>
Technical Manager 303-415-9701 x222<BR>
NWRA/CoRA Division FAX: 303-415-9702<BR>
3380 Mitchell Lane orion@cora.nwra.com<BR>
Boulder, CO 80301 <A HREF="http://www.cora.nwra.com">http://www.cora.nwra.com</A><BR>
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