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VMware VM device node type (IDE vs SCSI)

Can anyone tell me if there is a performance difference between creating a VMDK as an IDE or SCSI device?

Thanks
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MMRNLA
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MMRNLA
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2 Solutions
 
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, use SCSI, and LSI at that!
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coolsport00Commented:
Yes; and if you use IDE you run the risk of not being able to modify the VMDK (i.e. increase the size) as needed.

~coolsport00
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DavidPresidentCommented:
Hanccocka beat me to it, hands down, SCSI. End of discussion, award points to him, and move on.
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MMRNLAITAuthor Commented:
Would it be comparable to physcial differences in regards to IDE vs SCSI?

I can't seem to find anything online regarding the actual differences.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, but IDE also causes more overhead on the host.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
IDE, was only provided recently for backward compatibility purposes. Use SCSI.
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MMRNLAITAuthor Commented:
My issue is that I was provided a template for a Sharepoint 2010 app server. This template was set as "Other". So the default disk type was IDE. Not good when all of your SharePoint servers are spinning on IDE with no ability to resize.

thanks guys.
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coolsport00Commented:
You can convert to SCSI (see this KB: http://kb.vmware.com/kb/1016192), but it's a bit intricate. Your best bet to convert the disk is do a V2V using Converter Standalone. You have the option, during the conversion wizard, to modify the disk controller type.

~coolsport00
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MMRNLAITAuthor Commented:
as usual, thanks guys
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