SCSI-3 Persistent Reservation with Veritas

Question

I've searched the web for information on SCSI-3 PR, every site I've found tells me what it does and how to set it up but I can't find anything that tells me how it does it. Does anyone have a doc or know a website that gets to the geek level of how it works?

Thanks,
Hank

xe2sdc · Answer

www.t10.org/ftp/t10/document.04/04-060r0.pdfHank is it geekish enough ??

KD8EWE · Answer

This link from Ibm & symantec may help you to understand the concept more

http://publib.boulder.ibm.com/infocenter/clresctr/vxrx/index.jsp?topic=/com.ibm.cluster.rsct_5300_06.vsd.doc/bl506_undperr.html

http://seer.entsupport.symantec.com/docs/261824.htm

BlackBox2 · Answer

SCSI-3 PR in Veritas is a mechanism to protect data corruption when their a condition of split brain in the Cluster;

It works like, every node is writing its know keys on the coordinator disks (a set of odd luns), When heartbeat break by any mean then nodes are racing to form a cluster again as nodes are not down, they try to get control of data disks and they are racing for the same. Node who win the race will clear other nodes keys at the coordinator disk and take the control of all the data luns and reboot the other nodes which is out of the race;

This will help to clear split brain in the Veritas cluster;

Symmetrix

SCSI-3 Persistent Reservation with Veritas

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