12.4Miscellaneous operating features and conditions
Table 9 lists various features and conditions. A “Y” in the support column indicates the feature or condition is supported. An “N” in the support column indicates the feature or condition is not supported.
Table 9: | Miscellaneous features | |
|
|
|
Supported |
| Feature or condition |
|
|
|
N |
| Automatic contingent allegiance |
|
|
|
N |
| Asynchronous event notification |
|
|
|
N |
| Synchronized (locked) spindle operation |
|
|
|
Y |
| Segmented caching |
|
|
|
N |
| Zero latency read |
|
|
|
Y |
| Queue tagging (up to 64 queue tags supported) |
|
|
|
Y |
| Deferred error handling |
|
|
|
Y |
| Parameter rounding (controlled by Round bit in Mode Select page 0) |
|
|
|
Y |
| Reporting actual retry count in Extended Sense bytes 15, 16, and 17 |
|
|
|
N |
| Adaptive caching |
|
|
|
Y |
| SMP = 1 in Mode Select command needed to save RPL and rotational offset bytes |
|
|
|
Table 10: | Miscellaneous status | |
|
|
|
Supported |
| Status |
|
|
|
Y |
| Good |
|
|
|
Y |
| Check condition |
|
|
|
Y |
| Condition met/good |
|
|
|
Y |
| Busy |
|
|
|
Y |
| Intermediate/good |
|
|
|
Y |
| Intermediate/condition met/good |
|
|
|
Y |
| Reservation conflict |
|
|
|
Y |
| Task set full |
|
|
|
N |
| ACA active |
|
|
|
N |
| ACA active, faulted initiator |
|
|
|
54 | Constellation ES.2 SAS Product Manual, Rev. D |
