Seagate ST3285N, Product Manual

Page: 124 / 151

Appendix B.3. When the usage bit is 0, the warning message is
disabled. If requested, the EEPROM data and the write counter
is updated even after the write life span is exceeded, but the
integrity of the data cannot be assured.
Byte 2 When the synchronous select mode (SSM) bit is 0, the drive
does not send a synchronous data transfer message unless the
initiator has already issued a synchronous data transfer mes-
sage. When the
SSM bit is 1, the drive can send a synchronous
data transfer message, even when the initiator has not sent a
synchronous data transfer message.
When the
disable unit attention (ATOFF) bit is 0, the drive
generates a unit attention condition during power up. When the
disable unit attention (ATOFF) bit is 1, the drive does not
generate a unit attention condition during power up.
Byte 3 The device type qualifier field can have a value from 00
H
through
7F
H
. This field can be read back by the host in Inquiry data,
byte 1. The Inquiry data is discussed in Appendix D.
Byte 4 The spinup delay field controls the drive when it is not in the
remote mode. When the value is 00
H
, the drive spins up without
delay. When the value is FF
H
, the drive delays spinup after a
duration, in seconds, equal to the drive’s SCSI bus ID number
times 5. When the value is 01
H
through FE
H
, the drive delays
spinup for the corresponding duration, in seconds.
114 ST3655 Family SCSI Drives Product Manual, Rev. A