hard disk for old 3b2/300

[Philip A. Gross]

In article <252 at bigbroth.UUCP>, rk at bigbroth.UUCP (rohan kelley) writes:
> We just completed installation of the maxtor xt2190 into our 3b2/400.
> We formatted it to 1024 cylinders just as the net postings indicate
> is the limit. (didn't even try more). It gives us 135 mb formatted and
> seems much faster than our present 72 meg fujitsu M2234AS (standard
> equipment).  With the idtools kit from ATT as recommended by Steve
> Friedel @ vsi.com it was no problem.  
> 

We have two rather hefty hard disks that we are USING on our system
not including two standard 72MB disks provided by AT&T.  As you can
see by the vtocs (Volume Table of Contents) listed below, we were able
to format the disks to their full capacity of 1224 cylinders.  In order
to do this, you do need to use the AT&T IDTOOLS kit instead of the older
AT&T DEVTOOLS.

* /dev/rdsk/c2d1s0 (Maxtor 2190) partition map
*
* Dimensions:
*     512 bytes/sector
*      18 sectors/track
*      15 tracks/cylinder
*     270 sectors/cylinder
*    1224 cylinders
*    1222 accessible cylinders
*
* Flags:
*   1: unmountable
*  10: read-only
*
*                          First     Sector    Last
* Partition  Tag  Flags    Sector     Count    Sector  Mount Directory
       6      0    01          0    329940    329939
       7      0    01          0       270       269
       8      0    00        270    329670    329939   /usr4


* /dev/rdsk/c1d1s0 (Priam 519) partition map
*
* Dimensions:
*     512 bytes/sector
*      18 sectors/track
*      15 tracks/cylinder
*     270 sectors/cylinder
*    1224 cylinders
*    1222 accessible cylinders
*
* Flags:
*   1: unmountable
*  10: read-only
*
*                          First     Sector    Last
* Partition  Tag  Flags    Sector     Count    Sector  Mount Directory
       6      0    01          0    329940    329939
       7      0    01          0       270       269
       8      0    00        270    329670    329939   /usr



The parameters given for the disk physical info are as follows:

Manufacturer	Model	Size	ID	Cyl	Tr/Cyl	Sec/Trk	Bytes/Sec
=========================================================================
PRIAM		519	190Mb	10	1224	15	18	512
MAXTOR		2190	190Mb	10	1224	15	18	512

As a note, sometimes this physical info would not "take" the first time, so
what we would do is enter this information and the defect map under the
DEFECT option under IDTOOLS and then select FORMHARD under IDTOOLS in order
to do the actual formatting.  Also, there were no hardware modifications
required to the motherboard in order to do this.

> 
> NEXT QUESTION! We want to install a new disk in place of the old 30 meg
> on an old 3b2/300.  We understand 8 heads and 1024 cylinders is the
> limit.  We understand that a good candidate for that combination is the
> PRIAM ID130 available from Storage Plus at $1385.  Has anybody successfully
> installed this disk or similar disk on an old 300?
> 

In answer to this question, both the MAXTOR and PRIAM drives were formatted
on an AT&T 3B2/300 before installation into the 3B2/400.


===============================================================================
	The opinions expressed here are strictly mine, mine, all mine
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
				   |
Philip A. Gross			   |	pag at tcsc3b2	(804)794-1514
The Computer Solution Co., Inc.	   |
1009 Sycamore Square		   +-------------------------------------------
P.O. Box 716			   |
Midlothian, VA  23113-0716	   |	I haven't heard what I have to say
Voice: (804)794-3491		   |	about that yet.