Instruction manual

When this switch is set to On, and the Delay Motor Start Switch 5 is set to
Off, the disk drive motors do not start until a START MOTOR command is
issued. The timing sequence of disk motor startup is under the control of the
using system software.
When this switch is set to Off, and the Delay Motor Start Switch 5 is set to
On, the disk drives are set to Delay Motor Start mode. The disk motor startup
delay time is different for each disk drive and is usually computed by
multiplying 12 seconds by its SCSI ID. For example, the disk drive motor of a
disk drive having a SCSI ID equal to two will start 24 (2 x 12) seconds after
power is applied to the 2104.
When this switch is set to Off, and the Delay Motor Start Switch 5 is set to
Off, the disk drives are set to Normal Start mode. The disk drive motors will
start when power is applied to the 2104.
The effect of both this switch and the Delay Motor Start Switch 5 being set
to On is undefined.
The default logical setting for this switch is On.
Enable Enclosure Services switch 3
When this switch is set to On, the enclosure services can operate.
When the switch is to Off, no response occurs to any request to use the
enclosure services.
The default logical setting for this switch is On.
Select Enclosure Services switch 4
This switch selects which enclosure services can be used — SAF-TE or SES.
When set to Off, it selects SAF-TE.
When set to On, it selects SES.
The default logical setting for this switch is On.Note:SAF-TE services are not
used with RS/6000 or IBM
server
pSeries computers.
Delay Motor Start switch 5
Refer to the explanation of the Drive Autostart Switch 2.
The default logical setting for this switch is Off.
Box ID switch 6
This 10-position rotary switch indicates the ID of the 2104. The operator
selects the required setting which can be used by the SES Inquiry command
and the SAF-TE buffer 1 command.
The default logical setting for this switch is 0.Note:SAF-TE services are not
used with RS/6000 or IBM
server
pSeries computers.
18 2104 Models DU3 and TU3 Operator’s Guide