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Shump
Contributor
Contributor
‎07-28-2009 10:49 PM

SCSI vs. IDE Virtual Drives

Hello!

This question may have been answered elsewhere, but this far I have not seen it.

If we are running ESXi 4 on a SATA hard drive, does it make any difference in performance whether we create our virtual hard drives as SCSI or IDE drives? Is there a performance gain or loss to either? I would tend to think that because the underlying drive and controller is actually SATA, that choosing to create virtual SCSI drives would not provide a performance gain, or could perhaps entail a performance loss, but I'd like some confirmation or correction from those of you with experience.

Thanks for your help!

- Tom

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4 Replies
dab
Enthusiast
Enthusiast
‎07-29-2009 01:11 AM

You should always create SCSI Disks, even if the underlying System is SATA.

IDE should only be used for CD-ROMs.

Daniel

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microkid
Hot Shot
Hot Shot
‎07-29-2009 05:33 AM

ESX(i) does not support creation of IDE virtual drives. ESX only support SCSI virtual drives.

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dab
Enthusiast
Enthusiast
‎07-29-2009 05:41 AM

For shure ESX(i) 4 supports IDE drives, have a look to my screenshot ...

Daniel

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microkid
Hot Shot
Hot Shot
‎07-29-2009 05:52 AM

Oops, missed that Smiley Happy If you always use the wizard, IDE drives are quite hidden from view Smiley Happy Anyway, as best practice I never use them.

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