Seagate ST12450W, Product Manual

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ST12450W/WD Product Manual, Rev. A 51
11.4 SCSI bus conditions
and miscellaneous features supported
Asynchronous SCSI bus conditions supported by the drive are listed in
Table 7. These conditions cause the SCSI device to perform certain actions
and can alter the phase sequence. Other miscellaneous operating features
supported are also listed here.
Table 7. SCSI bus conditions and other miscellaneous features
Condition/feature supported by:
SCSI-1 SCSI-2
Conditions or feature
Y Y Attention condition
Y Y Reset condition
N Y Contingent allegiance condition
N Y Asynchronous event notification
Y Y Arbitrating system
Y Y Disconnect/reconnect
Y Y Asynchronous data transfer
Y Y Synchronous data transfer
Y Y Synchronized (locked) spindle operation
Y Y Differential interface circuits available
Y Y Segmented caching
N N Zero latency read
N Y Queue tagging (up to 64 queue tags supported)
N Y Deferred error handling
Y Y Parameter rounding (controlled by round bit
in Mode Select page 0)
N N Reporting actual retry count in extended sense
bytes 15,16, and 17
N N Adaptive caching
Y Y Adaptive read lookahead
Y Y SMP = 1 in Mode Select command needed to
save RPL and rotational offset bytes
(in Table 5.2.1-25 of
SCSI-2 Interface Product
Manual, Vol. 2).
SCSI-1 SCSI-2 Status supported
Y Y Good
Y Y Check condition
Y Y Condition met/good
Y Y Busy
Y Y Intermediate/good
Y Y Intermediate/condition met/good
Y Y Reservation conflict
Y Y Queue full