Scsi Cable; Scsi Bus Terminator; Hot Plug/Unplug; Scsi Bus Electrical Characteristics - IBM Ultrastar 36LZX Specifications

7.1.3 SCSI cable

Refer to ANSI SPI-3 T10/1302D Revision 11.

7.1.4 SCSI bus terminator

Onboard SCSI active termination feature is not supported. The using system is responsible for making
sure that all required signals are terminated at both ends of the bus cable.
7.1.4.1 Terminator power
Termination power can be provided by drive 5V supply through current limiter and Schottky diode. This
function can be selected by jumper.
80 pin SCA-2 models do not support SCSI bus termination power.

7.1.5 Hot plug/unplug

The term 'Hot Plug' refers to the action of mechanically engaging a device to the power and/or bus when
other devices may be active on the same bus. A comprehensive classification of the state of the SCSI
bus during this event is located in the SCSI-3 Parallel Interface Standard.
While every effort was made to design the drive not to influence the SCSI bus during these events, it is
the responsibility of the system to insure voltage regulation and conformance to operational and
non-operational shock limits. During Hot Plug events the non-operational shock levels should not be
exceeded. The operational shock levels of adjacent drives should also not be exceeded. The
recommended procedure is to prohibit write operations to adjacent drives during Hot Plug and Hot
Unplug actions.
During Hot Unplug the operational shock limit specifications should not be exceeded. If this cannot be
guaranteed then the drive should be issued a SCSI Stop Unit command that is allowed to complete
before unplugging. The basic requirement is that while the drive is operational or spinning down the
operational shock limits are in effect. Once the drive has completely stopped the non-operational shock
limits are in effect. The recommended procedure is to allow the unplugged drive to rest in the drive bay
for a minimum of 15 seconds and then complete the removal. During Hot Plug or Unplug events the
power supply ripple on adjacent operational drives should not be outside the +/-5 % regulation tolerance.

7.1.6 SCSI bus electrical characteristics

Refer to ANSI SPI-3 T10/1302D Revision 11 for bus electrical characteristics.
NOTE: If the drive is connected to an HVD bus, the drive I/O will be permanently damaged.
Ultrastar 36LZX hard disk drive specifications
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