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тАО03-28-2006 01:58 AM
тАО03-28-2006 01:58 AM
Raid 5 on 641 controller incredibly slow
RAID 5 array on a 641 controller w/4 146GB U3 SCSI drives, 64KB stripe size. Copying a file internally, the speed averages about 4MB/sec. It may have been this way since installed. The array controller does not have battery backed cache,not was this ever suggested by our HP authorized vendor.
Can this possibly be normal behavior for this machine? If so, why did they put GB NICs in the thing?
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тАО03-29-2006 09:28 PM
тАО03-29-2006 09:28 PM
Re: Raid 5 on 641 controller incredibly slow
I see two solutions:
a) upgrade your controller with BBWC
b) migrate RAID level to 1+0 which will steal some capacity (only half available), but delivers much better performance
Regards,
Radek
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тАО03-30-2006 12:36 AM
тАО03-30-2006 12:36 AM
Re: Raid 5 on 641 controller incredibly slow
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тАО03-30-2006 12:54 AM
тАО03-30-2006 12:54 AM
Re: Raid 5 on 641 controller incredibly slow
http://www.informit.com/articles/article.asp?p=359414&seqNum=3&rl=1
But do not expect any magic trick - BBWC is a necessity for RAID5!
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тАО03-30-2006 01:50 AM
тАО03-30-2006 01:50 AM