Step 5: Determining Whether To Disable Auto Start - IBM OPTIONS SCSI Manual Del Usuario

Save any spare jumpers; you may have to change the SCSI ID. See the SCSI
Hard Disk Drive User's Guide Supplement to determine if you can safely store
spare jumpers on the drive jumper points.

Step 5: Determining whether to disable Auto Start

Note: Be sure that Auto Start is disabled when you are installing the hard disk
drive into an IBM server.
See the SCSI Hard Disk Drive User's Guide Supplement to determine if Auto Start
(also called Auto Spinup or Motor Start) is enabled on your drive jumper pins.
If Auto Start is enabled, this attached drive starts at once when the computer is
turned on. However, starting two or more drives simultaneously might
overload the computer power supply. If you want to sequence drive startup to
flatten the power peak required for drive startup, be sure that Auto Start is
disabled. If Auto Start is disabled, the drive is prevented from starting until it
receives the Start Unit command from the SCSI adapter. Most SCSI adapters
send the Start Unit commands to the drives sequentially from SCSI ID 0 to
SCSI ID 15.
If you are installing the drive in an IBM computer, do the following to verify
that the SCSI adapter will send the Start Unit command to your drive:
1. Turn on the computer.
2. Press Ctrl + A while the SCSI adapter power-on self-test (POST) window is
displayed.
3. Select Configure/View Host Adapter Settings, and then press Enter.
4. Select SCSI Device Configurations, and then press Enter.
5. Be sure that Yes is selected for Send Start Unit Command under the SCSI
ID that is assigned to your drive.
6. Press Esc twice to save changes.
7. Select Yes to exit from the utilities.
For more information, see the specifications for your drive and power supply.
For more information about drive startup, see the documentation that comes
with your SCSI adapter.
For SCSI adapters that do not send the Start Unit command, see the
documentation that comes with your SCSI adapter.
Spindle Sync, Parity Disable, Write Protect, Auto Start Delay, Disable Unit
Attention, and other jumper positions that might be on the drive jumper block
are not needed for most installations.
Part 1: Installation and user's guide
1-7