[Lustre-discuss] Hardware or software RAID?

[Mark Dixon]

Thanks Klaus, Andreas,

"correct and slow" sounds generally preferable over "wrong and fast" - so 
I guess in this situation hardware RAID still wins.

I get worried when I hear Sun's marketing department talk about the "RAID5 
write hole" whenever they tout ZFS. Clearly, moving to RAID6 does not 
solve this. Even if you have a UPS, systems sometimes still come down 
hard.

It's interesting that TACC is using software RAID on JBODs, as clearly the 
cost of HW RAID would not have been an issue for them.

Many thanks once again,

Mark
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Mark Dixon                       Email    : m.c.dixon at leeds.ac.uk
HPC/Grid Systems Support         Tel (int): 35429
Information Systems Services     Tel (ext): +44(0)113 343 5429
University of Leeds, LS2 9JT, UK
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