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fdzedzy

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September 25th, 2008 11:00

Enable Persistent Reservation on NS20

I am attempting to setup a Windows 2008 cluster using drives connected by iSCSI. I am getting an error in validation: "Failed to Register PR key for cluster disk 0 from node" and "Cluster Disk 0 does not support Persistent Reservation". How do I enable SCSI-3 PR on my Celerra NS20?

Rainer_EMC

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8.6K Posts

September 25th, 2008 12:00

you need to upgrade to 5.6.39 - which is the first release to implement this

From the release notes:

SCSI Persistent Reservation support
This release supports SCSI persistent reservation (PR) commands,
which are used by a cluster management subsystem, such as
Microsoft Windows Server 2008, to define exclusive or restricted
access to iSCSI LUNs for client nodes in a shared disk environment.
A new server parameter, EnableAptpl, enables or disables Activate
Persist Through Power Loss (APTPL) support for all targets on a Data
Mover. When APTPL support is enabled, the server supports
requests from a cluster to maintain persistent reservation information
on nonvolatile storage. By default, APTPL support is disabled.

If you're already on 5.6.39 just enable iscsi.EnableAptpl through server_param or the GUI

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