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disk performance issue

umberto Vecchi


Hi everybody

I've some disk performance issue with this scenario :

Hp Proliant DL360 GEN10 4110  1 Xeon 8-Core 4110 - 16Gb Ram - Controller HPE Smart Array P408i-a SR Gen10 for 4 SAS HDD 15K 300Gb (raid 1+0)

Xen Sever 7.6 + Xen Tools


I noticed slow performance with the VM (windows 2016 Standard)


I ran some tests with Passmark PerformanceTest 9

I had these results :

Disk Seq Read 951

Disk Seq Write 895

Disk random seek + write 933


same test, on a phisical windows machine, on a identical server, gives : 

Seq Read 3593

Seq Write 3646

Random seek + write 3365


Can you help me to understand why ? thank you very much



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I've never used Passmark, but you shouldn't see that much decrease in spped.

Could be lots of reasons, but if you have a support agreement going directly

to Citrix may be the best way to get answers.  We can throw suggestions back

and forth on the forums, but it would be nicer to have an actual diagnosis. 






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