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FORUMS arrow How-tos arrow General Q&A arrow Is my VM only emulating an ATA disk?
Topic Title: Is my VM only emulating an ATA disk?
Topic Summary: Disk benchmark performance is real bad, suspect NCQ ATA.
Created On: 01/18/2007 05:25 PM
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  Is my VM only emulating an ATA disk?   - mweber - 01/18/2007 05:25 PM  
  Is my VM only emulating an ATA disk?   - cbarclay - 01/18/2007 05:50 PM  
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01/18/2007 05:25 PM
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mweber
Apprentice

Posts: 26
Joined: 11/17/2006

I managed to get a capture of the POST of my VM (I would show it here but the forum does not accept files) and it seems to find some ATA drives.  ATA typically does not accept disk IO queue greater than 1.

My diskbenchmarking is showing bad results, and the storage array never sees this server push a higher disk queue depth than 1.

How do I set my VM to emulate SCSI?

I have the VM tools installed, (I would post a picture of that but the forum does not accept files).  Under summary for the VM the vmtools revision is 3.2.9.29......

Help.
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01/18/2007 05:50 PM
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cbarclay
Fellow

Posts: 216
Joined: 04/28/2006

Please use the support process to report product issues.

VSTools provides accelerated IO for virtual servers. In Linux, disks look like IDE drives (regardless of the type of underlying storage). In Windows, disks look like SCSI drives (again, regardless of the type of underlying storage).

Edited: 01/18/2007 at 05:52 PM by cbarclay
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FORUMS : How-tos : General Q&A : Is my VM only emulating an ATA disk?

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