larryd1@killer.Dallas.TX.US (Larry Clark) (03/31/89)
My employeer has need of large, high reliable disk drives with high
data transfer drives. The micropopolis esdi drives meet the data
transfer rates nicely, but their mtbf falls short by some 10,000 hours.
Can anyone recommend a manufactorer who makes drives that have a
capacity of 150 megs or greater and a MTBF of 50,000 hours? Price is
not a factor, but data transfer rate is, so I suspect that ST506 is
out and esdi or scsi is in.
Thanks
Larry D. Clarkpalowoda@megatest.UUCP (Bob Palowoda) (04/01/89)
From article <7715@killer.Dallas.TX.US>, by larryd1@killer.Dallas.TX.US (Larry Clark): > > My employeer has need of large, high reliable disk drives with high > data transfer drives. The micropopolis esdi drives meet the data > transfer rates nicely, but their mtbf falls short by some 10,000 hours. > > Can anyone recommend a manufactorer who makes drives that have a > capacity of 150 megs or greater and a MTBF of 50,000 hours? Price is > not a factor, but data transfer rate is, so I suspect that ST506 is > out and esdi or scsi is in. > > Thanks > Larry D. Clark I beleive Core International and Prime have 50,000 mtbf. Actually Prime has a 5 year warrenty of some sort which works out to be 43,000 mtbf. I once worked in a QA department that derived these figures from one year data. What I would be interested in is what bearing manufacture is used for what drive. On the subject of disk transfer rates I have been reading some interesting results of these benchmarks in MIPS magazine. The one that caught my attention is the Rupp 386 machine using a ESDI controller with cache for the controller. Other ESDI setups transfered 100k/bytes/sec (1meg/1task) and the Rupp controller did over 400k/bytes/sec(1meg/1task). Rupp Computer products advertise this disk controller as "PM3011 Caching Controller". List for 1150.00. Does anyone know who manufactures this controller? Another question is how do different ESDI device drivers affect the disk tranfer rate. And why or how did the caching controller override this limitation? ---Bob -- Bob Palowoda Work: {sun,decwrl,pyramid}!megatest!palowoda Home: {sun}ys2!fiver!palowoda BBS: (415)796-3686 2400/1200 Voice:(415)745-7749
jbayer@ispi.UUCP (Jonathan Bayer) (04/01/89)
In article <7715@killer.Dallas.TX.US> larryd1@killer.Dallas.TX.US (Larry Clark) writes: > > My employeer has need of large, high reliable disk drives with high > data transfer drives. The micropopolis esdi drives meet the data > transfer rates nicely, but their mtbf falls short by some 10,000 hours. > > Can anyone recommend a manufactorer who makes drives that have a > capacity of 150 megs or greater and a MTBF of 50,000 hours? Price is Priam offers drives with a 3 year guantantee. A company called Phoenician Faire is selling 330 meg priams for $ 1625. I have no connection with Phoenician Faire except as a satisfied customer. JB -- Jonathan Bayer Beware: The light at the end of the Intelligent Software Products, Inc. tunnel may be an oncoming dragon 19 Virginia Ave. ...uunet!ispi!jbayer Rockville Centre, NY 11570 (516) 766-2867 jbayer@ispi.UUCP
Chip_N_Oliver@cup.portal.com (04/02/89)
In article <7715@killer.dallas.TX.US> larryd1@killer.dallas.TX.US writes: > My employeer has need of large, high reliable disk drives with high > data transfer drives. The micropopolis esdi drives meet the data > transfer rates nicely, but their mtbf falls short by some 10,000 hours. > Can anyone recommend a manufactorer who makes drives that have a > capacity of 150 megs or greater and a MTBF of 50,000 hours? Price is > not a factor, but data transfer rate is, so I suspect that ST506 is > out and esdi or scsi is in. First of all I think it's crazy to rule out a drive because it's MTBF falls short of some pre-determined requirement by 10k hours. There's a lot of factors more important than MTBF that will determine when and whether a drive will fail (and luck may even take a large part). Second, for the bulk of applications, seek time is much more important than transfer rate. I'd rather have an 18ms ST-506 drive over a 40ms ESDI drive anyday. Chip Oliver coliver@cup.portal.com Lockheed Missiles and Space sun!portal!cup.portal.com!coliver