Re: asm on san

From: Bob Jones <email_at_me.not>
Date: Thu, 11 Dec 2008 20:05:44 -0600
Message-ID: <1Gj0l.13797$>

"Mladen Gogala" <> wrote in message news:ghr89f$qpv$
> helter skelter wrote:
>> Hi,
>> I'm preparing to test some configurations on san storage array. I would
>> like to find out what will be better in my environment: raid1+0 or
>> raid5. Other thing is what size of segment size should be configured on
>> storage array. For example, I've got 5 disks in RAID5, so if ASM default
>> stripe size for datafiles is 1MB, so segment size on strage shouls be
>> 256KB to hit all drives, am I right?
>> What tools are You recommend to do tests like this: sequentail/sequence
>> reads etc? thanks
>> oracle 10gr2, rhel5
> RAID 5 is not good for databases, period. Not for data files, especially
> not
> for the log files, you can only use RAID 5 partition for
> log_archive_dest_25
> If your boss told you to evaluate RAID 5, it is very likely that he wants
> to
> save some money in the wrong place and will buy you RAID 5, no matter what
> your findings are. Moan Isnogood has a great site at
> The abbreviation "BAARF" stands for "Battle Against Any Raid Five". Your
> company is probably doomed and will not make it through the recession.
> Have
> a nice day.
> --

Maybe we all can use RAID 5 as a reason for government bailout. Received on Thu Dec 11 2008 - 20:05:44 CST

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