Server 2k8r2 Hyper-v guest disk performance

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aeble

New Member
Dec 23, 2012
2
0
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Hi guys

I'm new to this forum, but have been reading articles from the site on several occations.

My problem lately, has been that I seem to be missing out on hardware performance in my server setup. It is a setup which I have built over a few years, and it is in no way a production environment. Only for fun and games.

The essential hardware:

Supermicro X8DTH-6

1x Intel® Xeon® Processor E5620 (12M Cache, 2.40 GHz, 5.86 GT/s Intel® QPI)

6x Hynix HMT31GR7BFR4C-H9 8gb DDR3 ECC modules

IBM ServeRAID M5015

4x Seagate ST3300555SS 10K RPM 300GB SAS drives



Let me just illustrate what I mean:

ATTO Benchmark - Former Highend gamerpc with 4x320GB Seagate SATA disks




ATTO Benchmark - Server machine as described above, with 4x300GB Seagate SAS drives




Question is.. Why would the performance be so degraded, just by running it in a virtual machine? The VM has 8GB dedicated RAM, 4 CPU cores, a 30GB SSD as O/S drive, and as the other pc it is running on a Windows 7 platform.

I'd appreciate any help I can get, seeing as this is a little annoying when you spend the money for performance, and don't quite get it.

Thanks in advance! Best regards

/aeble
 

Patrick

Administrator
Staff member
Dec 21, 2010
12,508
5,785
113
I'm clearly tired. With 4x drives you are getting over 400MB/s write and 1.7GB/s read performance? That is pretty good. The huge read numbers are because you are hitting the LSI 512MB cache. The Seagate ST3300555SS are from 2008 or so so 100MB/s each is not too bad.