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Re: Experience with HP Smart Array P400 and SATA drives?

From: "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com>
To: "Gabriele Turchi" <gabriele(dot)turchi(at)l39a(dot)com>
Cc: "Mario Weilguni" <mweilguni(at)sime(dot)com>, "Alan Hodgson" <ahodgson(at)simkin(dot)ca>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Experience with HP Smart Array P400 and SATA drives?
Date: 2008-12-09 16:25:15
Message-ID: dcc563d10812090825q1374615frc1c6f95717d01f75@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
On Tue, Dec 9, 2008 at 9:03 AM, Gabriele Turchi
<gabriele(dot)turchi(at)l39a(dot)com> wrote:
> We reached a fairly good performance on a P400 controller (8 SATA 146GB 2,5"
> 10k rpm) with raid5 or raid6 Linux software raid: the writing bandwidth
> reached about 140 MB/s sustained throughput (the hardware raid5 gave a
> sustained 20 MB/s...). With a second, equal controller (16 disks) we reached
> (raid6 spanning all 16 disks) about 200 MB/s sustained.

That's better than you were getting but still quite slow.  I was
bothered that my 12x15k4 SAS RAID-10 array could only sustain about
350Megs/second sequential read, thinking that each drive should be
able to approach 80 or so megs/second and I was only getting about
60...

This sounds more and more like HP is trying to undercompete along with
Dell in the RAID controller market or at least the raid controller
driver market.

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Next:From: Peter EisentrautDate: 2008-12-09 16:27:00
Subject: Re: Experience with HP Smart Array P400 and SATA drives?
Previous:From: Aidan Van DykDate: 2008-12-09 16:17:50
Subject: Re: Experience with HP Smart Array P400 and SATA drives?

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