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HW RAID 6 Performance

Last response: in Storage
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October 23, 2010 2:22:20 AM

I've gotten 5 WD 500GB RE3 RAID Edition harddrives in RAID 6.

is this performance level somewhere in the expected ballpark? The HW RAID Card is refurbished so I would like to know if it's working properly. Any suggestions are welcome

Environment:
OS: Windows Server 2003
Mobo: P5E VM DO /w ICH9R (fakeRAID)
HW RAID Controller: Adaptec 3805
RAM: 4GB

HARDDRIVEs:
5x Western Digital SATA RE3 500GB

RAID Configuration:
RAID 6 with 5 WD RE3 SATA HDs handled by Adaptec 3805



How does it look?





WHY is HD Tune indicating 70mB/s, so SLOW??



(ABOVE) this really doesn't look right, way too slow for 5 drives stripped....

is this performance level somewhere in the expected ballpark? The HW RAID Card is refurbished so I would like to know if it's working properly.

More about : raid performance

October 23, 2010 8:01:51 PM

With RAID 6 you only use 3 of the 5 drives, two are reserved for redundancy, hence the R in RAID. The remaining three drives are also not striped as in a RAID 0. Unfortunately I have no idea of what performance could be expected from a RAID 6, but your card may be bottlenecked by the x4 connection - I recall reading somewhere that PCI-e x4 only was as fast as a PCI-X, but I'm not sure if that is correct.
!