km@emory.uucp (Ken Mandelberg) (01/20/88)
Sun just announced a 892 Meg 9 inch SMD drive. Does anyone
know the manufacturer and model number of the drive?
--
Ken Mandelberg | {decvax,sun!sunatl,gatech}!emory!km UUCP
Emory University | km@emory BITNET
Dept of Math and CS | km@emory.ARPA ARPA,CSNET
Atlanta, GA 30322 | Phone: (404) 727-7963earle@jplopto.uucp (Greg Earle) (01/21/88)
The vendors are NEC and Hitachi; as far as specific model numbers go, I don't know, but the combination of 900 Mb capacity, 15 ms ave. seek time, and 2.4 Mb/sec transfer rate should zero in on it but right quick ... Greg Earle earle@jplopto.JPL.NASA.GOV Indep. Sun consultant earle%jplopto@jpl-elroy.ARPA [aka:] Rockwell Science Center earle%jplopto@elroy.JPL.NASA.GOV Thousand Oaks, CA ...!cit-vax!elroy!smeagol!jplopto!earle
duane@cg-atla.UUCP (Andrew Duane X5993) (01/21/88)
In article <2467@emory.uucp>, km@emory.uucp (Ken Mandelberg) writes: > Sun just announced a 892 Meg 9 inch SMD drive. Does anyone > know the manufacturer and model number of the drive? > -- > Ken Mandelberg | {decvax,sun!sunatl,gatech}!emory!km UUCP > Emory University | km@emory BITNET > Dept of Math and CS | km@emory.ARPA ARPA,CSNET > Atlanta, GA 30322 | Phone: (404) 727-7963 The drive model numbers are: NEC D2363 and Hitachi DK815-10 They are 9" SMD drives that are (overall) about the size of an elongated shoebox (260mm x 216mm x 687mm) and mounts into a 19" rack. The general specs are: HITACHI NEC Cylinders: 1735+2 964+2 Heads: 15 27 Sectors/track: 67 67 Total Capacity: 871838Kb 871938Kb Xfer Speed: 2458Kb/s 2458Kb/s Avg. Latency: 8.3 ms 8.3 ms We have had one of each of these drives here for about 2 months now, and they are running flawlessly. The performance in "real use" on a Sun-3/160 seems to be better than the Eagles they replaced, but stricter benchmarking does not bear this out. We are currently investigating why they are so fast in normal use, but so slow (<400Kb/s) in raw-device testing. When I get more information on this, I will post the results. BTW, I do not know if Sun has "officially" released these drives yet: we have them as beta-test units. Andrew L. Duane (JOT-7) w:(617)-658-5600 X5993 h:(617)-475-9188 Compugraphic Corp. decvax!cg-atla!duane 200 Ballardvale St. ulowell/ Wilmington, Mass. 01887 cbosgd!ima/ Mail Stop 200II-3-5S ism780c/ Only my cat shares my opinions, and she doesn't know how to type.
mangler@cit-vax.Caltech.Edu (Don Speck) (01/26/88)
In article <1305@cg-atla.UUCP>, duane@cg-atla.UUCP (Andrew Duane X5993) writes: > HITACHI NEC > Cylinders: 1735+2 964+2 I just received a spec sheet on the NEC 23XX series, here's the geometries: Model: 2332 2352 2352H 2362 2363 2373 cylinders 823 760 760 850 1024 1024 read/write heads 20 19 19 23 27 27 bytes per track 20480 36288 36288 40960 40960 51200 transfer rate (MB/s) 1.21 1.86 2.18 2.46 2.46 3.07 The NEC regional office said that the 2363 was only being sold via OEM's at the moment (e.g. Sun), and that distributors (Hamilton-Avnet, Hallmark, and Arrow-Kierulff) won't be getting them for a couple of months. NEC's main telephone number is +1 617 264 8000. Don Speck speck@vlsi.caltech.edu {amdahl,ames!elroy}!cit-vax!speck