topic Re: XP 1024 Consistent reservation. in XP Storage

XP 1024 Consistent reservation.

David Gutierrez_4 — Thu, 16 Feb 2006 19:45:02 GMT

Hello Everyone,
We got a XP1024 with over 70 TB of data and multiple HBAs and hosts utilizing the luns. However, when we stop using a lun from a HOST and delete it from the OS and we attempt to reassign this lun device to another host, then the XP1024 complaints of a persistant reservation from the HOST.
We are facing this issue with Tru64, AIX and Solaris.

Has anyone seen this issue before and how you resolved it.

Thanks in Advance!

David

Re: XP 1024 Consistent reservation.

Chan 007 — Fri, 17 Feb 2006 09:20:18 GMT

David,

I may be wrong, I have not come across this one, but I understand is that, XP arrays are from HDS and HP has a bit modified microcode on the firmware. This may be your case.

Just call HP in your area to help you out.

Once again I may be wrong.

Thanks
Chan

Re: XP 1024 Consistent reservation.

Uwe Zessin — Fri, 17 Feb 2006 12:12:57 GMT

The XP arrays are developed togethe with Hitachi JPN, not HDS and the reservation has nothing to do with the HP-specific firmware.

The Tru64 Unix Trucluster software uses persistent reservations. The system disk (and possible the bootable CD-ROM) should have a utility to remove the reservation.

Re: XP 1024 Consistent reservation.

David Gutierrez_4 — Fri, 17 Feb 2006 14:13:14 GMT

That should be the case. But it is not what I have been told by the OS.

David

Re: XP 1024 Consistent reservation.

kris rombauts — Sat, 18 Feb 2006 09:25:37 GMT

David,

for configurations using HP Autopath (multipath s/w now embedded in SecurePath) on Windows their is a utility available to reset persistent reservations, i don't know about the OS's you use but maybe they do provide simmilar utilities.

It can be run to check for any persistent reservations first and then if you want, you can also reset a specific reservation.
see example below:

HP Auto Path> apprutil disks

NT Disk # DeviceName Scsi Addr. Reservation
--------------------------------------------
Disk 3 HP OPEN-9 0.0.1.16 None
Disk 4 HP OPEN-9 0.0.2.17 None

Here's the info from the HP Autopath utility (apprutil.exe) :

* Persistent reservations clear utility (apprutil.exe):

If there is a stray persistent reservation on a device, the device may not be accessible from host systems. The persistent reservations clear utility can be used to remove such reservations from the device,thereby allowing host systems to access the device.

Examples:

APPRUTIL CLEAR DISK=1 Clears reservation present on NT disk 1.

APPRUTIL CLEAR DISK=3 10 Clears reservation present on NT disks 3 to 10.

Kris

Re: XP 1024 Consistent reservation.

David Gutierrez_4 — Tue, 21 Feb 2006 09:26:17 GMT

Thanks for the info. Yes, the Tru64 OS has an utility to clear the persistent reservation, but in this case the os does not clear this reservation instead it complains the reservation is in the XP1024.

David