My old equipment :)



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HDD 3.5"





SEAGATE ST3491A


HDD IDE 427.8MB, CYL 899, HDS 15, SECT 62 - Seagate drive.

On the disk label we find the necessary information to set manually in the BIOS: the number of cylinders, heads and sectors. There is also a drawing and description of jumper settings.

Disk with Optimus label and part number. A disk obtained at an online auction.

A 8-pin jumper block is prepared for the MASTER/SLAVE settings:

1. No jumpers: The drive is a master; the slave is either an ST3491 family drive or another ATA-compatible drive, or there is no slave.

#-7-5-3-1-#
#-0-0-0-0-#=> FRONT 40 pin interface
#-8-6-4-2-#

2. Jumper 5-6: The drive is a master; a slave is present, but it is not ATA-compatible.

#-7-5-3-1-#
#-0-Z-0-0-#=> FRONT 40 pin interface
#-8-6-4-2-#

3. Jumper 1-2: The drive is a master; a slave is present, but it does not have a DASP-signal.

#-7-5-3-1-#
#-0-0-0-Z-#=> FRONT 40 pin interface
#-8-6-4-2-#

4. Jumper 7-8: The drive is a slave to an ATA-compatible master.

#-7-5-3-1-#
#-Z-0-0-0-#=> FRONT 40 pin interface
#-8-6-4-2-#

5. Jumper 3-4: Cable select.

#-7-5-3-1-#
#-0-Z-0-0-#=> FRONT 40 pin interface
#-8-6-4-2-#

6. Jumpers 5-6 i 7-8: Factory test (Do not use).

#-7-5-3-1-#
#-Z-Z-0-0-#=> FRONT 40 pin interface
#-8-6-4-2-#


I checked the ST3491A drive as a master, no slave - my choice was point 1 - no jumpers - TEST OK :)

Disk as Master, no slave; also worked when jumper 7-8 of point 4.


Saved :) Efficient.

Useful (I was here and checked):

Look at it yourself:


Gallery: ST3491A



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