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Terrible performance with PERC H310 mini
I realise this card is far from good and it's running RAID 5 but is 11mb/sec for both read and write really what I should be expecting?
It's in an R320 server, 64gig ram, Server 2012.
We have two other Dell 1U servers, both R230's, both running Windoze, both RAID 5, one with an S130 in, one with a Perc H330, both these read and write at over 100mb/sec.
Thanks.
Anonymous
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April 3rd, 2017 16:00
Hello.
PERC H310 is designed without controller cache as alluded by dhiru1602. As a consequence, it performs several reads followed by a write to disk for every write I/O operation is sent from the host to the RAID 5 array. This means that when a write I/O is sent to the RAID 5, it reads all the space containing the I/O's logical block address, insert the write data, recalculate parity, and write the I/O to disk. The controller confirms that the I/O is complete after all the I/O operation has been written to the disk.
Therefore, the slow performance of RW of 11 Mb/s that you have observed is a result of design and yet with cache, the peak write performance for a RAID 5 with a write cache typically is about 90-150 Mb/s. You may try using RAID 10 otherwise, upgrade to PERC H710 controller which has cache feature.
dhiru1602
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April 3rd, 2017 16:00
H310 is an entry level RAID controller without cache. That is the reason why it performs very bad on RAID setups. Upgrade to H710 or H710P.
fontyyy
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April 4th, 2017 12:00
both the S130 and the H330 in our R230's have no cache, both read and write at over 100mb/sec.
Let's be fair here, 11mb/s is poor, considerably worse than you get from a £100 RAID motherboard and a handful of £35 SATA drives.
fontyyy
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April 7th, 2017 03:00
Right, server redone, RAID 10, all firmware and drivers up to date and.....
still 11mb/sec read and write
does this indicate a problem (other than a joke PERC card)?