Path: utzoo!utgpu!water!watmath!uunet!nuchat!uhnix1!woton!killer!codas!mtune!godfre!vanderen
From: vanderen@godfre.UUCP (Richard H. Van Deren II)
Newsgroups: unix-pc.general
Subject: Re: disk drives?
Message-ID: <408@godfre.UUCP>
Date: 11 Feb 88 05:14:14 GMT
Organization: Godfrey Goes West Corp., New York City
Lines: 76


  Richard is dreaming again.
  
  I want to upgrade my disk.
  I heard about the Seagate ST01 scsi host converter.
  
  On a IBM PC it is a card that converts ST506 commands to scsi.
  So, why not on the unix-pc?  The WD1010 disk controller is ST506 right?
  So,,, why not remove the WD1010 connect the input pins "somehow" to
  the ST01?  Are the input pins to the WD1010 a PC BUS?  Well then, what
  kind of bus are they?  Is this idea too silly?  I work as an application
  programmer and know little about hardware, however it seems that I have
  all the building blocks to a solution.    (Except where to put the card
  and how to get power.)
  
  Why do I want to go scsi?
  
  Seagate is coming out with a new drive in March.
  
  Here are the specs
  
  ST296N 1/2 height ------- or stack three with at 3B1 top.  I like the
  idea of buying them one at a time. or stack 8 full height ST4192N's in a
  box outside and get 1.348 gigabytes on a unix-pc?
  
  FORMATTED CAPACITY		1		3
  
  Megabytes			85		255
  Sectors per Drive		166,054
  Sectors per Cylinder		203	
  Bytes per Cylinder		103,936
  Sectors per Track		34
  Bytes per Track		17,408
  Bytes per Sector		512
  
  PHYSICAL ORGANIZATION
  
  Tracks			4,908	
  Cylinder			818
  Read/Write Heads		6
  Disks				3
   
  FUNCTIONAL SPECIFICATIONS
  
  Rotational Speed		3,600 RPM
  Recording Method		RLL (2,7)
  Recording Density (BPI)	19,869
  Flux Density (FCI)		13,246
  Track Density (TPI)		777
  Interface			SCSI
I/O Data Trans.Rate(Mbits/sec.)	12
Int.Data Trans.Rate(Mbits/sec.)	10
  
  ACCESS TIME (msec.)
  
  Track-to-Track		8
  Average			28	
  Full-Stroke			70	
  Average Latency		8
  
  POWER REQUIREMENTS
  
  +12 VDC (amps typ.)		.5
  (amps max.)			2
  +5 VDC (amps typ.)		1.4	
  Power (watts typ.)		13
  
  
  


-- 
Richard H. Van Deren II, 235 West 56th Street, #11J New York City, NY 10019
HOME: (212) 246-8199 WORK: (212) 830-3170 godfre (212) 246-8281
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