TYAN Transport GT24 B2881, Руководство сервисного инженера

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64 Chapter 3: Replacing Pre-Installed Components
M1205 HDD Start-Mode & ID Selection Switch
SW1 & SW2 HDD Start-Mode Selection Switch
Case SW1
(DLYD_START) SW2
(RMT_START) Motor Spin Func-
tion
1 OFF OFF Motor spins up at
D.C. power on.
2* ON OFF Motor spins up at
D.C. power on after
a delay in seconds
12 times** the value
of the numeric
SEL_ID for the SCSI
device.
3 OFF ON Motor spins up only
when START UNIT
command is
received.
4 ON ON Reserved. SCSI
devices not imple-
menting this option
shall execute power
control according to
the rules of case 3.
Note:
*Case 2 is the default setting.
**This value may be reduced by SCSI device supplies to reflect the
wrost-case time duration of peak current drains at the 12 V.D.C or 5
V.D.C source or both during motor spin up. In no case should the
delay exceed 12 s.