To
answer your questions.....
1)
Ideally, yes, though they don't need to be.
2)
Absolutely. Veritas will get very unhappy if it loses access to those
disks
3)
SCSI-3 Persistent Reservation. When a node "malfunctions", another node
will issue a SCSI-3 reservation against the 3 coordinator disks. When the
broken node tries to access those disks (as it does every few seconds normally)
it will be rejected and the box will panic (I'm pretty sure it panics - test
it)
Feel
free to email me off-list if you have any other questions.
Thanks,
Matt
--
Matthew Zito
GridApp Systems
Email:
[EMAIL PROTECTED]
Cell: 646-220-3551
Phone: 212-358-8211 x 359
http://www.gridapp.com
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of laura pena
Sent: Friday, July 25, 2003 1:04 PM
To: Multiple recipients of list ORACLE-L
Subject: Re: RAC - Configuring Disk CoordinatorSorry all my message got hacked here is the first paragraphGoing through the Veritas installation guide (pg 47) and I have a question on the required 3 LUN creation needed to support RAC for Veritas DBE/AC, when setting up Disk Coordinator:
laura pena <[EMAIL PROTECTED]> wrote:- Configuration - Should each of these 3 LUN be on seperate disks?
- What is the smallest LUN that Hitachi 9570V can be? I guess I can ask our rep if no ones knows.
-Should these LUNs be mirrored?
- Coordinator disks are used to support IO fencing can anyone elborate how this happens?Thanks in advance,Lizz
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