Seagate ST31250N Product Manual page 41

Barracuda 2LP Product Manual, Rev. D
3. Eliminate all I/O processes for the drive.
4. Wait until the drive motor and discs have come to a complete stop prior
to changing the plane of operation, ensuring data integrity.
5. Insert or remove the drive after meeting the following conditions:
Caution. Do not hot-plug the first or last device on the SCSI bus (the
SCSI bus termination must be external to the drive you are
inserting or removing).
a. If you are inserting the drive, connect its power ground and logic
ground at least 1 millisecond before coming into contact with the bus
connector. Maintain these ground connections during and after con-
necting the device to the bus.
b. If you are removing the device, maintain its power ground and logic
ground connection for at least 1 millisecond after disconnecting the
device from the bus.
c. You may simultaneously switch the power to the electronics and
mechanics of the drive with the bus contacts, if the power distribution
system is able to maintain adequate power stability to other devices
during the transition and if you have met the grounding requirements
given in steps 5a and 5b.
d. Ensure that the drive carrier discharges all static electricity prior to
inserting the drive into the system.
Note. Do not remove or add terminator power or resistance to the SCSI bus
while hot plugging a disc drive.
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