disk drives?

[Richard H. Van Deren II]

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
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