[bananas] Big SCSI disks for AIPS

[Thomas M. Ruwart]

We just purchased a bunch (98) Seagate Baracuda 50 disk drives
that have a formatted capacity of about 50GB each. These are standard
3.5-inch disks, 7200 rpm, and come in LVD Parallel SCSI as well as
Fibre Channel. They work great and generate about half as much heat
at the 18GB disks. The performance of each disk is anywhere from
14MB/sec on the inside cylinders to 24MB/sec on the outer cylinders.
The seek and rotational latencies are the same as the 18GB disk so the
random I/O performance is about the same as the 18GB disk but it
is still reasonable fast.

They are available for under $1300 per drive so don't pay more than that
for those drives. You will also need an enclosure with power supplies,
cables, ...etc. so add that into your cost. It is pretty cool to have 8 drives
in a single enclosure that adds up to about 400GB.

Contact me, Tom Ruwart (tmr at lcse.umn.edu) if you want/need more
information on these drives.

-Tom

"T. Joseph W. Lazio" wrote:

> We are considering the purchase of SCSI disks with a capacity of 18 GB
> or more for our main AIPS machine.  We have seen various disks offered
> for less than $1000.  (The cost, in dollars/MB, seems far better than
> the RAID systems I've been quoted.)
>
> Has anybody already purchased such disks? or had any experience with
> disks this size to offer?
>
> -- Joseph
>
> --
> T. Joseph W. Lazio              voice: (202) 404-6329
> Code 7213, Remote Sensing Div.  fax:   (202) 404-8894
> Naval Research Lab              email: lazio at rsd.nrl.navy.mil
> Washington, DC 20375-5351 USA   Web:   http://rsd-www.nrl.navy.mil/7213/lazio/
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