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From: wally@athenanet.com (Wally Hartshorn)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Need Quantum Q250 Specs (Q105, LPS52 spces?)
Message-ID: <1991Jun12.045908.23797@athenanet.com>
Date: 12 Jun 91 04:59:08 GMT
References: <1991Jun6.203652.20963@cbnewsm.att.com> <18730007@col.hp.com> <1991Jun7.222535.24387@ucselx.sdsu.edu>
Organization: Athenanet, Inc.,  Springfield, Illinois
Lines: 60

In article <1991Jun7.222535.24387@ucselx.sdsu.edu> maxc1503@ucselx.sdsu.edu (David Tse) writes:
>I just bought and installed a Quantum PD105 (Q105), 3.5" half height, and
>...
>wonder what is the access time of each drive, and speed, buffer size?
>...
>Is there an LED output from the drives? I'm thinking about adding 2 LEDs to
>indicate which drive is being accessed (right now I go by sound).
>...

According to the specs in Quantum's Technical Reference Manual, Rev 10/90,
page 1-1, here are the specs:

SCSI ProDrive 105S (half height):
	105 MB formatted
	205,075 logical blocks
	6/3 heads/disks
	19ms average seek time
	12ms effective average access time with DisCache
	64K DisCache buffer
	50,000 POH mean time between failure
	1.625" high X 4.0" wide X 5.75" deep
	4 to 50 degrees C operating temperature
	8 watts idle power consumption
	9 watts typical (30% seek) power consumption

SCSI ProDrive LPS 52S (third height):
	52 MB formatted
	102,171 logical blocks
	2/1 heads/disks
	17ms average seek time
	< 12ms effective average access time with DisCache
	64K DisCache buffer
	60,000 POH mean time between failure
	1.0" high X 4.0" wide X 5.75" deep
	4 to 50 degrees C operating temperature
	4.5 watts idle power consumption
	5.5 watts typical (30% seek) power consumption

Note that these specs are for the old (half height) 105S and the new (third
height) 52S.  The new 105S has specs equivalent to those of the new 52S as
far as access time, etc, are concerned.

Sorry, but I don't have any specs on a Q250.  Did you mean the Q210S?  That's
the old half height.  I believe they just came out with a third height
version.  Anyway, the old version was similar, with a seek time of < 15ms
and an effective access time of < 12ms.  I expect the new LPS version is
faster.

Yes, there is an LED hookup, at least on the LPS Q105S that I just got.
The lead is on the front of the drive.  If you bought the older version,
I don't know if it has one or not.

You might try calling tech support: (408) 894-5390 (voice) or
(408) 894-3225 (fax).  Leave a message on the voice mail system and they'll
get the information you need.
-- 
Wally Hartshorn (uunet!pallas!wally or wally@athenanet.com)
President, Amiga Computer Enthusiasts of Springfield (ACES)
Chronicler, Shire of Swordcliff, SCA
Sysop, The Quest, F&SF BBS, Citadel-68K node US (217) 546-7608