EVA 8100 & SCSI-3 Persistent Reservation

[Taerg]

Does EVA 8100 support SCSI-3 Persistent Reservation? How can we configure this feature and what CV version should be for this functionality?

[Mikko Niskanen_1]

Aye,

See this:

http://forums13.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1268820939663+28353475&threadId=1404859

Hope it's what your'e looking for.

[Taerg]

Mikko, thank you. But I need to know if SCSI-3 is supported by EVA 8100 and what CV or firmware is requered.

[Mikko Niskanen_1]

At least EVA 4000 with oldish XCS/CV combination works, don't see why EVA 8100 shouldn't work.

root# scsimgr set_attr -D /dev/rdisk/disk23 -a disable_flags='WCE PR'
Value of attribute disable_flags set successfully
root# scsimgr get_attr -D /dev/rdisk/disk23 -a disable_flags

SCSI ATTRIBUTES FOR LUN : /dev/rdisk/disk23

name = disable_flags
current = PR WCE
default = WCE
saved =

root# scsimgr set_attr -D /dev/rdisk/disk23 -a disable_flags='WCE'
Value of attribute disable_flags set successfully

root# scsimgr get_attr -D /dev/rdisk/disk23 -a disable_flags

SCSI ATTRIBUTES FOR LUN : /dev/rdisk/disk23

name = disable_flags
current = WCE
default = WCE
saved =

[Uwe Zessin]

It is automatically provided in the controller firmware. You cannot configure/enable/disable it for specific hosts. CV-EVA just shows when a reservation has been made.

[Taerg]

Please see errors on win 2008 r2 failover cluster validation.

Here is windows 2008 core team recomendation:

'call your storage vendor and ask them if your storage is compatible AND configured for use with Windows Server 2008 Failover Clustering'

http://blogs.technet.com/askcore/archive/2009/04/15/windows-2008-failover-cluster-validation-fails-on-validate-scsi-3-persistent-reservation.aspx

HP support could not answer my question and recomended to ask in this forum...

[Uwe Zessin]

Did you assign the correct operating system type (Microsoft Windows 2008) to those servers in CV-EVA?

While you cannot really make fine-grained configuration changes (the details of the CUSTOM bitmask are not documented), the OS type is a predefined configuration setup for a single operating system and tells the EVA how to properly interact.

[Taerg]

Uwe,
I can only assign 'Microsoft Windows' or 'Microsoft Windows LH' OS types. It can be custom type assigned but than I have to enter 16-bit hex value that I don't know.

We have CV 7.0. May be we should update to 9.2 but I am not sure that this will help.

[Víctor Cespón]

There's a specific mode for Windows 2008, do not select just "Microsoft Windows".

[Uwe Zessin · Accepted solution]

"Microsoft Windows LH" (LH = "Longhorn") was the codename for Windows 2008.

The custom mask is 00000004198009A8.

[Taerg]

Setting "Microsoft Windows LH" helped.

[Taerg]

Setting "Microsoft Windows LH" as a host type for windows 2008 enables nessasary functionality

[Taerg]

Thank you very much!!!

[Mark Salomon]

Dear all,

we have a comparable problem with a EVA4400. In order to set up a cluster correctly, we have to configure a quorum-disk with SCSI3 persistent reservation, but in CV-EVA there is no field available where we can change the type of SCSI reservation.

The OS in the presentation is currently configured as "Microsoft Windows Server 2008", the type of reservation is reported as none and the cluster verification fails. The host mode option stated in this thread "Windows LH" is not availible anymore.

Please advise...

[Uwe Zessin]

Mark,

the host OS decides when and what type of SCSI reservation is done and how/when to undo it - CV-EVA only reports the status = what it has received from the host.