Hello raiders,
This is just to tell that with almost the same configuration
which has been described (Mylex Extremeraid, 4 Cheetahs of third
generation), the only difference being that I use raid 0 and the
system is a Dell Poweredge 6300 with two PIII Xeon-500Mhz,
I get roughly 70Mb/sec reading and 90Mb/sec writing of sustained
throughput.
Read the docs about how to create de filesystem to get the maximum
performance.
Also use the most recent driver, is faster.
Sincerely
--
------------------------------------------------------------------
Oscar Fernández Cantero <[EMAIL PROTECTED]>
CEIFE - Centro Español de Investigación Farmacoepidemiológica
Almirante 28 2º http://www.ceife.es
28004 MADRID, SPAIN
Phone: +34 91 531 7975
Fax: +34 91 531 2871
-------------------------------------------------------------------
> Kenneth Cornetet wrote:
>
> Hardware RAID does not necessarily preclude speed. I put a Mylex
> extremeraid 1164 (32MB cache, 2 channels) in a dual 450MHz P3
> connected to 4 18GB 10K RPM seagate wide low voltage differential SCSI
> disks in a raid 5 config and got about 22 MB/sec reads and writes as
> reported by bonnie.
>
> The OS was straight RedHat 6.0 - no tweaking or tuning (except
> creating the ext2 fs with 4k blocks)
>
> The raid array was set to a stripe size of 16k (which is not the
> default).
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, October 05, 1999 10:31 PM
> To: [EMAIL PROTECTED]
> Cc:
> Subject: Re: Dream RAID System
>
> > From [EMAIL PROTECTED] Tue Oct 5 22:48:26
> 1999
> >
> > Hi everyone--
> >
> > I have a question for everyone on the list: What hardware
> would you use
> > for a RAID system? I want it to be as robust as possible. It does
> not need
> > to be all that fast (equiv. or better than UDMA33 would be nice). I
> am
> > concerned with failover mostly -- Hot swap and reconstruction.
> >
> > I am putting together a quote for a box that will serve as a
> DB/Web server,
> > and data protection is the only important feature required. Are
> there any
> > concerns with hot swapping between RAID personalities (RAID5 and
> RAID1
> > mainly)....does one work better over the other when reconstruction
> comes
> > around?
> >
> > SCSI or IDE, and which cards of each have best support for hot swap?
>
> >
> > Thanks in advance.
>
> If you're not overly concerned about speed, but you NEED reliability,
> you
> almost have no choice but to use a hardware RAID controller. The
> software
> RAID stuff is nice, but I'd only bother with it if I needed either
> speed
> or I was on such a tight budget that I couldn't afford a hardware RAID
>
> card (I normally fall into the former category). The software RAID
> gets
> extraordinarily confused with hot swap so that's not even an option
> unless
> you're prepared to spend quite a lot of time becoming a "wizard".
>
> In terms of speed, RAID 0 is king. In terms of reliability and fault
> tolerance while still being speedy, RAID 5 would seem to be the
> choice.
>
> That said, I use the software RAID drivers daily. The level of
> confidence
> I'd have in the "survivability" of data is directly proportional to
> the
> amount of time you're willing to spend dickering around with the RAID
> system.
>
> Best of luck,
>
> Chris
> --
> Christopher Mauritz
> [EMAIL PROTECTED]
