VOGONS


First post, by envagyok

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Hy
I don't find this ericcson HDD's CHS and wb, landing zone setting.
Maybec someone has info?
Thanks for all the information and help.

Last edited by envagyok on 2023-02-02, 11:43. Edited 1 time in total.

Reply 1 of 5, by Disruptor

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Well, the printed error table is a good hint:
Min/Max cylinder is 0/4 --> 5 cylinders
Max head number is 931
Sectors of such old disks can be assumed with 17

You may have success with type 17 (CHS 977/5/17)

Reply 2 of 5, by envagyok

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There is sector 982 too

Reply 3 of 5, by Grzyb

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                         SEAGATE TECHNOLOGY, INC.
1-800-SEAGATE
http://www.seagate.com
(C)opyright 1991



ST-253 (94205-51) Wren 2 HH ST412 MFM



Drive Select .........Ŀ
o o o o o o o 1 Terminator . O O O O . Power
o o o o o o o ............Ŀ \........./
1 2 3 4 R r reserved .............. 1 12 G G 5
.......... .. ...................... ... ..................
. . ..Controller Cable
. ...Radial
.........If twisted cable, use Drive Select 2

ST-253
94205-51 WREN 2 HH

UNFORMATTED CAPACITY (MB) ________________51
FORMATTED CAPACITY (17 SECTORS) (MB) _____43
ACTUATOR TYPE ____________________________VOICE COIL
TRACKS ___________________________________4,795
CYLINDERS ________________________________989
HEADS ____________________________________5
DISCS ____________________________________3
MEDIA TYPE _______________________________OXIDE
RECORDING METHOD _________________________MFM
TRANSFER RATE (mbits/sec) ________________5.0
SPINDLE SPEED (RPM) ______________________3,600
INTERFACE ________________________________ST412
TPI (TRACKS PER INCH) ____________________960
BPI (BITS PER INCH) ______________________9,535
AVERAGE ACCESS (ms) ______________________28
SINGLE TRACK SEEK (ms) ___________________5
MTBF (power-on hours) ____________________40,000
POWER REQUIREMENTS: +12V START-UP (amps) _4.5
+12V TYPICAL (amps) __1.5
+5V START-UP (amps) __1.0
+5V TYPICAL (amps) ___0.4
TYPICAL (watts) ______20
MAXIMUM (watts) ______??
BUFFERED STEP PULSE RATE (micro sec) _____8-200
WRITE PRECOMP (cyl) ______________________128
REDUCED WRITE CURRENT (cyl) ______________N/A
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________*, 17 is close

* MAY REQUIRE A CONTROLLER WITH BIOS SUPPORT, OR FORMATTING
AND PARTITIONING SOFTWARE. ALSO, CHECK TO SEE IF YOUR CMOS SETUP
HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE AVAILABLE.

Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)
.

Nie tylko, jak widzicie, w tym trudność, że nie zdołacie wejść na moją górę, lecz i w tym, że ja do was cały zejść nie mogę, gdyż schodząc, gubię po drodze to, co miałem donieść.

Reply 4 of 5, by Horun

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Yeah the MN # gives it away..
Cylinders 989
Heads 5
Sector/track 17
Write Precompensation 128

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 5 of 5, by envagyok

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Thanks for everyone