Message-Id: <26013.339638@fatcity.com> From: "Matthew Zito" Date: Fri, 25 Jul 2003 13:55:52 -0400 Subject: RE: RAC - Configuring Disk Coordinator This is a multi-part message in MIME format. ------=_NextPart_000_004E_01C352B4.771917F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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: mzito@gridapp.com Cell: 646-220-3551 Phone: 212-358-8211 x 359 http://www.gridapp.com -----Original Message----- From: ml-errors@fatcity.com [mailto:ml-errors@fatcity.com] 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 Coordinator Sorry all my message got hacked here is the first paragraph Going 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 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 _____ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software _____ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software ------=_NextPart_000_004E_01C352B4.771917F0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
 
To=20 answer your questions.....
 
1)=20 Ideally, yes, though they don't need to be.
2)=20 Absolutely.  Veritas will get very unhappy if it loses access to = those=20 disks
3)=20 SCSI-3 Persistent Reservation.  When a node "malfunctions", another = node=20 will issue a SCSI-3 reservation against the 3 coordinator disks.  = When the=20 broken node tries to access those disks (as it does every few seconds = normally)=20 it will be rejected and the box will panic (I'm pretty sure it panics - = test=20 it)
 
Feel=20 free to email me off-list if you have any other = questions.
 
Thanks,
Matt
 

--
Matthew Zito
GridApp Systems
Email:=20 mzito@gridapp.com
Cell: 646-220-3551
Phone: 212-358-8211 x = 359
http://www.gridapp.com

-----Original Message-----
From:=20 ml-errors@fatcity.com [mailto:ml-errors@fatcity.com] On Behalf Of = laura=20 pena
Sent: Friday, July 25, 2003 1:04 PM
To: = Multiple=20 recipients of list ORACLE-L
Subject: Re: RAC - Configuring = Disk=20 Coordinator

Sorry all my message got hacked here is the first paragraph
 
Going through the Veritas installation guide  (pg 47) and I = have a=20 question on the required 3 LUN creation needed to support RAC for = Veritas=20 DBE/AC, when setting up Disk Coordinator:


laura = pena=20 <lizzpenaorclgrp@yahoo.com> wrote:=20
- Configuration - Should each of these 3 LUN be on seperate = disks?
-=20 What is the smallest LUN that Hitachi 9570V can be? I guess I can = ask our=20 rep if no ones knows.
-Should these LUNs be mirrored?
- = Coordinator=20 disks are used to support IO fencing can anyone elborate how this=20 happens?
 
Thanks in advance,
 
Lizz

Do you Yahoo!?
Yahoo!=20 SiteBuilder - Free, easy-to-use web site design=20 software

Do you Yahoo!?