On 13/09/12 11:21, GuoZhong Han wrote:
Hi David:
I am sorry for last mail that I had not described the
requirements of the system very clear.
I will detail for you to describe the requirements of the system.
(snip)
As you said, the performance for write of 16*2T raid5 will be
terrible, so what do you think that how many disks to be build to a
raid5 will be more appropriate?
Personally I wouldn't use more than 5 drives in a RAID5 with drives
larger than 1TB, the failure risk is too high. With 16x 2TB drives, how
about two RAID6 arrays of 8 drives each, then RAID0 them? (RAID60)
Or, two RAID6 arrays with 7 drives each, 2 hotspares, and RAID0 on top.
(RAID10 + 2 HSP)
You mention 36 cores. Perhaps you should try the very latest mdadm
versions and Linux kernels (perhaps from the MD Linux git tree), and
enable the multicore option.
Mathias
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