VCPGuru
Contributor
Contributor

VMware’s Paravirtual SCSI Adapter

Jump to solution

Is there a good reason the "VMware’s Paravirtual SCSI Adapter" not to use?

I would like to use this adapter for every VMs data (not boot partitions) partitions.

Reason: Have the hole environment identitical.

I heard only one disadvantage: VMs with low I/O will have no performance gains over the usually used SCSI adapter.

Thanks for your opinion!

Simon

Best Regards Simon Ciglia
0 Kudos
1 Solution

Accepted Solutions
a_p_
Leadership
Leadership

Is there a good reason the "VMware's Paravirtual SCSI Adapter" not to use?

If you don't need FT, I don't see any reason right now.

see http://blog.scottlowe.org/2009/07/05/another-reason-not-to-use-pvscsi-or-vmxnet3/

I would like to use this adapter for every VMs data (not boot partitions) partitions.

I guess you know that, anyway.

from the http://www.vmware.com/support/vsphere4/doc/vsp_esx40_u1_rel_notes.html

Enhanced VMware Paravirtualized SCSI Support

Support for boot disk devices attached to a Paravirtualized SCSI ( PVSCSI) adapter has been added for Windows 2003 and 2008 guest operating systems...

André

View solution in original post

0 Kudos
7 Replies
a_p_
Leadership
Leadership

Is there a good reason the "VMware's Paravirtual SCSI Adapter" not to use?

If you don't need FT, I don't see any reason right now.

see http://blog.scottlowe.org/2009/07/05/another-reason-not-to-use-pvscsi-or-vmxnet3/

I would like to use this adapter for every VMs data (not boot partitions) partitions.

I guess you know that, anyway.

from the http://www.vmware.com/support/vsphere4/doc/vsp_esx40_u1_rel_notes.html

Enhanced VMware Paravirtualized SCSI Support

Support for boot disk devices attached to a Paravirtualized SCSI ( PVSCSI) adapter has been added for Windows 2003 and 2008 guest operating systems...

André

0 Kudos
VCPGuru
Contributor
Contributor

Thanks, this was all i needed.

Greetings

Simon

Best Regards Simon Ciglia
0 Kudos
rickardnobel
Champion
Champion

I heard only one disadvantage: VMs with low I/O will have no performance gains over the usually used SCSI adapter.

I read something perhaps a year ago that there was a risk for actually lower performance for virtual machines with "lower" IO need if the PVSCSI driver was used. Do you know if that was true?

My VMware blog: www.rickardnobel.se
0 Kudos
vmroyale
Immortal
Immortal

Hello.

Yes, but it has been fixed in 4.1 - you can read much much more about it here at Scott Drummonds' site.

Brian Atkinson | vExpert | VMTN Moderator | Author of "VCP5-DCV VMware Certified Professional-Data Center Virtualization on vSphere 5.5 Study Guide: VCP-550" | @vmroyale | http://vmroyale.com
0 Kudos
rickardnobel
Champion
Champion

Yes, but it has been fixed in 4.1 - you can read much much more about it here at Scott Drummonds' site.

I think that was the article I read before, but I did not find anything about the issue being fixed in 4.1 and not in the What is new in Storage for 4.1 either?

EDIT: Now I saw the last comment on your link saying that is have been fixed. I wonder if there is any other reference available?

My VMware blog: www.rickardnobel.se
0 Kudos
vmroyale
Immortal
Immortal

VMware kb 1017652 was linked in Scott's blog - it contains a statement about this issue being fixed in vSphere 4.1

Brian Atkinson | vExpert | VMTN Moderator | Author of "VCP5-DCV VMware Certified Professional-Data Center Virtualization on vSphere 5.5 Study Guide: VCP-550" | @vmroyale | http://vmroyale.com
0 Kudos
rickardnobel
Champion
Champion

Great, thanks a lot.

My VMware blog: www.rickardnobel.se
0 Kudos