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EVA 8100 & SCSI-3 Persistent Reservation

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Taerg
Occasional Advisor

EVA 8100 & SCSI-3 Persistent Reservation

Does EVA 8100 support SCSI-3 Persistent Reservation? How can we configure this feature and what CV version should be for this functionality?
14 REPLIES
Mikko Niskanen_1
Frequent Advisor

Re: EVA 8100 & SCSI-3 Persistent Reservation

Taerg
Occasional Advisor

Re: EVA 8100 & SCSI-3 Persistent Reservation

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
Frequent Advisor

Re: EVA 8100 & SCSI-3 Persistent Reservation

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
Honored Contributor

Re: EVA 8100 & SCSI-3 Persistent Reservation

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.
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Taerg
Occasional Advisor

Re: EVA 8100 & SCSI-3 Persistent Reservation

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
Honored Contributor

Re: EVA 8100 & SCSI-3 Persistent Reservation

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.
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Taerg
Occasional Advisor

Re: EVA 8100 & SCSI-3 Persistent Reservation

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
Honored Contributor

Re: EVA 8100 & SCSI-3 Persistent Reservation

There's a specific mode for Windows 2008, do not select just "Microsoft Windows".
Uwe Zessin
Honored Contributor
Solution

Re: EVA 8100 & SCSI-3 Persistent Reservation

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

The custom mask is 00000004198009A8.
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Taerg
Occasional Advisor

Re: EVA 8100 & SCSI-3 Persistent Reservation

Setting "Microsoft Windows LH" helped.
Taerg
Occasional Advisor

Re: EVA 8100 & SCSI-3 Persistent Reservation

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

Re: EVA 8100 & SCSI-3 Persistent Reservation

Thank you very much!!!
Mark Salomon
Visitor

Re: EVA 8100 & SCSI-3 Persistent Reservation

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
Honored Contributor

Re: EVA 8100 & SCSI-3 Persistent Reservation

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.
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