Re: P2000 G3 I/O Performance (227 Views)
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Frequent Advisor
MGaccess
Posts: 40
Registered: ‎09-20-2004
Message 1 of 3 (227 Views)

P2000 G3 I/O Performance

I just recently purchased the G3 SFF SAS model for two DL580 G7′s ESX hosts. The setup was easy and this is an awesome little unit.

I was wondering what kind of Read speed you were seeing? From a Linux VM, I’m seeing 160-190MBps read time results using the “hdparm -tT /dev/sdxx” command. The results are similar whether /dev/sdxx is a vmdk or RDM disk. (RAID 5 array with six 300G 10K SAS disks).

Running the same command from the ESX console I see about a 15% increase in read speed (500MB vs 582MB in 3 seconds), which is expected because I am bypassing the VMware hypervisor altogether when running hdparm from the console (I think).

Do you know how these numbers compare to other units, or if 180MBps a decent speed? Thank you.
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Honored Contributor
Johan Guldmyr
Posts: 3,806
Registered: ‎06-14-2009
Message 2 of 3 (227 Views)

Re: P2000 G3 I/O Performance

Hey, HP used to recommend to not use hdparm, but instead use for example iometer to test performance.


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Frequent Advisor
MGaccess
Posts: 40
Registered: ‎09-20-2004
Message 3 of 3 (227 Views)

Re: P2000 G3 I/O Performance

Yes, thanks. But what kind sequential read results should I be seeing on this? Are there any benchmarks anywhere for this unit? Is 180MBps good?
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