'SCSI Level' - what does this mean ?

[big_vern]

Hi,

We have a HP EVA 8000 connected to 10 HP BL465Cs and 23 LUNs.

We are troubleshooting some major VM freezing issues (windows 2003 file server).

As part of the troubl;eshooting we have ran Veeam reporter and are lost as to what part of the document means or refers to:

When

viewing the Veeam report under the section 'LUNs' it specifies 'SCSI

Level' then a number. What does this mean (is the raid level ?? - we

only set RAID5 and RAID1 on our HP EVA8000 to which all the VMs are

connected).

In the same vein what does 'SCSI level Specified' mean and how is this set etc??

Heres an example from the report:

Name vmhba1:1:0

Device Name /vmfs/devices/genscsi/vml.020c00000050001fe1500b1800485356323130

Device Type array controller

Model HSV210

Revision 6200

SCSI Level 6

SCSI Level Specified True

Serial Number unavailable

Vendor HP

Host xxxxxxxxxx

thanks guys

[Rajeev_S]

Not sure whats scsi level refers to ..

Reg VM freezing, did you happen to see whether there are any CPU contention in the cluster you are running, Check the ready time in the ESX server when the issue happens.

Also you can check in SAN for Q length, IO/s & response time of the LUN. Also check in the RAID group level also, sometimes other LUN in the same RG may choke the disks.

Hope this helps!

[bobross]

It refers to the internal level of SCSI protocol support in this HSV controller, in particular the SPC (SCSI Primary Commands) level and the ALUA function. It has nothing to do with RAID.