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Re: harddisk configuration

From: "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com>
To: "Joseph S" <jks(at)selectacast(dot)net>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: harddisk configuration
Date: 2008-10-31 21:15:10
Message-ID: dcc563d10810311415m1d10392rdd3a7dbf98b0ac83@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-general
On Fri, Oct 31, 2008 at 1:21 PM, Joseph S <jks(at)selectacast(dot)net> wrote:
> Goboxe wrote:
>>
>> Hi,
>>
>> I just receive a new server with 5 x 73GB SAS harddisk.
>> I tried to maximize the total usable space when configure using RAID
>> 5.
>>
>> What I plan to do to configure all the 5 harddisks using RAID 5.
>> Windows operating system also will be installed the same RAID 5 ( I
>> going to have c: & d: drives)
>>
>> Is there any pro & cons when I using the above config?
>
> Raid 5 is slow.  I thought the dedicated hardware I had would do the
> checksums so fast and that raid 5 would be faster than raid 10 (since io is
> spread over more disks) but it turned out not to be the case.  I'd used raid
> 10 if I were you.

This++

Setup a 4 disk RAID10 with a hot spare.

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