RE: Oarcle and RAID question

We are running CX500 and CX700 Clariions all set up RAID10 (1+0)

Most of the time we are OK not apparent I/O problems)....however, I have noticed that (we use Spotlight on Oracle here) quite often several of my databases alert me to some waits on DBWn writes and LGWR writes. I am using the same PC with the same install of Spotlight. We did change from E10K multiple nodes to several Sun 480's and 880's. The ONLY other thing changed was we went from EMC Symmetrix RAID 1+0 to Clariion CX500 and CX700 RAID 1+0.

It bothered me to the point that one day I nailed down my SA to be SURE that our storage group had not slipped us some RAID5 pills.

My SA is dead set against RAID 5 and I knew that IF it had happened, it had been slipped in on him. He verified that we are 1+0.   

The EMC's were SCSI attached and the CX500/700 are fibre attached

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Goulet, Dick Sent: Wednesday, August 10, 2005 10:53 PM To: oracle-l_at_freelists.org
Subject: Oarcle and RAID question

Yeah, Yeah I know it sounds like bug spray, but is there anyone out there who has placed a database on an EMC CX500 SAN using raid 10? If so, what was the performance like? Our EMC rep is trying to sell us on the idea.

Dick Goulet
Senior Oracle DBA
Oracle Certified DBA
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http://www.freelists.org/webpage/oracle-l

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http://www.freelists.org/webpage/oracle-l Received on Fri Aug 12 2005 - 13:16:24 CDT