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IBM storage products
Auto Start Delay and Delay Start 6/12
The Auto Start Delay option (pins 3 and 4 on option block J6) and the Delay Start 6/12 option (pins 5 and
6 on option block J6) control when and how the drive spins up and comes ready in conjunction with
Enable/Disable Auto Spin up (pins 1 and 2 on option block J6). If Auto Spin up and Auto Start Delay are
jumpered, the spinning up of the drive is delayed by a period of time multiplied by the drive's SCSI
address. If Auto Spin up is disabled, these jumpers will be ignored.
Note: In the table below 'on' means a jumper is installed and 'off' means that a jumper is not installed.
Model
Auto Spin Up
68 pin
68 pin
68 pin
68 pin
68 pin
68 pin
68 pin
68 pin
80 pin
80 pin
80 pin
80 pin
80 pin
80 pin
80 pin
80 pin
Disable SCSI Parity Check
Place a jumper on pins 7 and 8 of option block J6 to disable SCSI Parity Checking.
Enable TI-SDTR
Place a jumper on pins 9 and 10 of option block J6 to enable Target Initiated Wide Data Transfer
Request Negotiation and Target Initiated Synchronous Transfer Request Negotiation.
Disable Unit Attention
Place a jumper on pins 11 and 12 of option block J6 to prevent the drive from building Unit Attention
Sense information for commands immediately following a Power On Reset (POR) or SCSI Bus Reset.
Any pending Unit Attention conditions will also be cleared at POR or SCSI Reset times.
IBM Technology Group Support Center
Auto Start Delay
(Pins 1 & 2)
(Pins 3 & 4)
off
off
on
off
off
on
on
on
off
off
on
off
off
on
on
on
off
off
on
off
off
on
on
on
off
off
on
off
off
on
on
on
Delay Start 6/12
(Pins 5 & 6)
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
Page 9
Auto Start
Delay
Multiplier
NO
-
YES
0
NO
-
YES
6
NO
-
YES
0
NO
-
YES
12
YES
0
NO
-
YES
6
NO
-
YES
0
NO
-
YES
12
NO
-
07N5612IG10
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