| From: | Matt Burke <mattblists(at)icritical(dot)com> |
|---|---|
| To: | Rajesh Kumar Mallah <mallah(dot)rajesh(at)gmail(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: suggestions for postgresql setup on Dell 2950 , PERC6i controller |
| Date: | 2009-02-06 08:32:21 |
| Message-ID: | 498BF595.7010503@icritical.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
Rajesh Kumar Mallah wrote:
>> I've checked out the latest Areca controllers, but the manual
>> available on their website states there's a limitation of 32 disks
>> in an array...
>
> Where exactly is there limitation of 32 drives. the datasheet of
> 1680 states support upto 128drives using enclosures.
The 1680 manual:
http://www.areca.us//support/download/RaidCards/Documents/Manual_Spec/SAS_Manual.zip
Page 25:
> Note:
>
> 1. The maximum no. is 32 disk drived included in a single RAID set
Page 49:
> 1. Up to 32 disk drives can be included in a single RAID set.
> 2. Up to 8 RAID sets can be created per controller
(point 2 meaning you can't do s/w RAID over umpteen h/w RAID1 pairs)
Page 50:
> To create RAID 30/50/60 volume, you need create multiple RAID sets
> first with the same disk members on each RAID set. The max no. disk
> drives per volume set: 32 for RAID 0/1/10/3/5/6 and 128 for RAID
> 30/50/60.
...and a few more times saying the same thing
--
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