From: scs@lokkur.dexter.mi.us (Steve Simmons)
Subject: SUMMARY: 1 GB 3.5" SCSI disks redux
Organization: Inland Sea
Date: Thu, 19 Nov 92 21:45:14 GMT

This is an expansion of the original article on 1+GB 3.5 SCSI disks as
written by Aydin Edguer (edguer@ces.cwru.edu) a few days ago.  I asked
Aydin for some other data points on power and heat, and he very kindly
supplied them.  This post incorporates that new data and is otherwise
unchanged from his original.  I have done a bit of reformatting to
(I hope) make the new data more readable.

Steve Simmons
Inland Sea
scs@lokkur.dexter.mi.us

=========================================================================

There are at least seven models that are available now or will be available
shortly.  There are also a few 1.2/1.3 GB (formatted) disk drives
(IBM 0663 E15, DEC DSP3160) available.

DEC DSP3105, Fujitsu 2694S, HP C2247, IBM 0663 model E12, Maxtor MXT1240S,
Micropolis 2112, and Seagate ST11200N.  The Fujitsu is just being released
in the U.S.  The Maxtor is due out in quantity by the end of the year.

You can contact some of the vendors directly for datasheets and vendor
information:
	Fujitsu	 	+1-800-626-4686
	Hitachi	 	+1-800-HIT-ACHI
	Maxtor		+1-800-2MA-XTOR
	Micropolis	+1-800-395-3748
	Seagate	 	+1-800-468-3472

DISK LIST:

Vendor:			DEC		HP		Seagate
Model:			DSP3105		C2247		ST11200N
Interface:		Fast SCSI-2	Fast SCSI-2	Fast SCSI-2
Drive RPM:		5400		5400		5400
MTBF:			250,000		300,000		300,000	
Capacity:		1.05GB		1.05GB		1.05GB
Max seek time:		20 ms		25 ms		26 ms	
Track-to-track:		1 ms		2.5 ms		1.9 ms
Error corr:		264bit ECC	??bit ECC	??bit ECC
Cache size:		512KB		256KB		256KB	
Warranty:		Varies		5 year		5 year
Noise:			39dBA@0.5m	37dBA@1ft	33dBA@(1ft?)
Power consumption (amps)
  +12vdc avg/typ:	0.85		0.45/0.8	0.5
  +12vdc max:		??		2.6		2
  +5vdc avg/typ:	0.71		1.0		0.24
Heat dissipation (watts)
  average (idle)	11.2		10.5		9
  typical (active)	13.7		14.5		??
  unspecified		??		??		??

Vendor:			Micropolis	IBM
Model:			2112		0663 model E12
Interface:		Fast SCSI-2	Fast SCSI-2
Drive RPM:		5400		4317
MTBF:			200,000		500,000
Capacity:		1.05GB		1.04GB
Max seek time:		25 ms		18.9 ms	
Track-to-track:		1.5 ms		0.6 ms
Error corr:		64bit ECC	??bit ECC
Cache size:		512KB		256KB
Warranty:		5 year		5 year
Noise:			35dBA@1ft	34dBA@1m
Power consumption (amps)
  +12vdc avg/typ:	0.6		0.45
  +12vdc max:		2.2		2.7
  +5vdc avg/typ:	0.8		1.1
Heat dissipation (watts)
  average (idle)	??		??
  typical (active)	??		??
  unspecified		12		10.9

Vendor:			Maxtor		Fujitsu
Model:			MXT1240S	2694S
Interface:		Fast SCSI-2	Fast SCSI-2
Drive RPM:		6300		4400
MTBF:			300,000		300,000
Capacity:		1.05GB		1.08GB
Max seek time:		20 ms		22 ms	
Track-to-track:		1.5 ms		2.5 ms
Error corr:		88bit ECC	64bit ECC
Cache size:		256KB		256KB
Warranty:		???		5 year
Noise:			30dBA@1ft	43dBA@1m
Power consumption (amps)
  +12v avg/typ:		0.79		0.5
  +12vdc max:		2.5		2.0
  +5vdc avg/typ:	0.81		1.1
Heat dissipation (watts)
  average (idle)	??		??
  typical (active)	??		??
  unspecified		13		??


COMMENTS:

DEC was said to be very fast but tended to be "noisy" and ran "hot", perhaps
too hot to be used internally.  The warranty on DEC drives vary by distributor.

HP was said to be a reliable drive but also expensive.  HP gives it
a 5 year warranty.

Seagate gives a 5 year warranty - little was said about the drive.  A Seagate
spec sheet that listed the rotational speed as 4500 RPM was accidentally
released.  The proper speed is 5400 RPM and current spec sheets have been
updated to reflect this.

Micropolis gives a 5 year warranty - it also tended to be the lowest priced.
Beta versions of the drive were said to have compatibility problems but
production versions are supposed to have no problems.

IBM gives a 5 year warranty - was said to be a quiet reliable drive.

Maxtor is supposed to be fast and looks like the fastest in term of maximum
sustained transfer rate [6300 RPM].  Not yet available so compatibility and
pricing are not yet known.

Fujitsu has been selling its drive overseas for a while.  Fujitsu America
is just releasing the drive in the U.S.  No one who owned one commented.

The type of supplied by vendors for power ratings tends to vary, hence
the many ?? entries in those categories.


DISTRIBUTORS LIST:

StorNet		216 368-2801	Seagate
Unison		508 879-3200	Micropolis	[DEC]
NPI		708 325-4151	Micropolis	
CoComp Inc	800 658-5981	IBM		
Artecon	 	800 872-2783	DEC (1 yr)	
R-Squared	800 777-3478	DEC (2 yr)	[Micropolis,Seagate]
Concorde	800 322-1303	DEC		
SelTech	 	216 338-3663	Seagate		[Micropolis]
Anthem Tech	800 359-9877	HP		[Seagate]
Aviv		617 270-6900	DEC		
Cranel		800 288-3475	Seagate		[Fujitsu,HP]
Rave Computer	800 966-7283	IBM		
WT		800 882-0007	HP		
Western Science 800 443-6699	Seagate
NCA Periphs	408 739-9010	-		
-- 
 "When Dexter's on the Internet, can Hell be far behind?"
		-- Steve Simmons, scs@lokkur.dexter.mi.us
Newsgroups: comp.sys.sun.hardware