RE: OT: SAS drives

Ok, I'll chime in too, things to look for when purchasing a server
drive.

Drive:    Performance

              Mean Seek Time, RPM Speed, Cache, Burst Transfer Rate,
Sustained Transfer Rate, Mean Failure Time

            Control Function

              SCSI, IDE, Serial ATA

                        SCSI - I can name six incompatible flavors f
internal SCSI drives

                        IDE - All are backwards / forwards compatible to
some extent

                        SATA - Two forms, but the first was never in
popular use and I believe newer drives do work on older controllers.

            Interface/Physical connection

              What kind of connector do you have?  Do you use a standard
cable connection? Or do you have a high-speed back plane?  

            Hot Swap

              Are your dives/backplane hot swappable?

            RAID

              What kind of RAID are you using? How will this disk fit in
your configuration?  If you using something like RAID 5 and you plane to
make this drive a volume member then you should get the exact model
number of the drive.

Purchasing from some one other then the manufacturer.

I use SCSI-3 UWLVDSCA-2 drives in my servers, but I never purchase the
drives rite from Dell, but since I do put them as member drives in my
RAID I typically purchase the exact same model of drive each time. I
personally like Seagate Barracudas



________________________________

From: plug-discuss-bounces@lists.plug.phoenix.az.us
[mailto:plug-discuss-bounces@lists.plug.phoenix.az.us] On Behalf Of
Shawn Badger
Sent: Friday, January 18, 2008 7:33 AM
To: Main PLUG discussion list
Subject: Re: OT: SAS drives



I can't answer this question specifically, I can say that in my past
experience the only thing different on the server drives has been the
carriers to insert them into the chassis.

Yes, there are the different spindle speeds and life expectancies, but
as long as you stick with a brands like Seagate or IBM, you should have
no problems with the drives for some time.




On Jan 17, 2008 5:31 PM, Jason Hayes <jason@jasonhayes.org> wrote:

Quick question for the group.

I have a friend that is trying to set up an IBM blade server and is
looking
for SAS drives.

The IBM drives are around $600-ish and HP drives are $3-400. So he is
wondering if the bladecenter drives are standardized or proprietary.

He's also wondering where in the valley he would find them at a
reasonable
price.

He said that the SCSI expansion module in his bladecenter is model
#26k4851.

Thanks
--
Jason Hayes

E-mail: jason@jasonhayes.org
Blog: www.jasonhayes.org
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