User Manual

SCSI Commands Reference Manual, Rev. J 461
www.seagate.com Parameters for direct access devices
PAGE CODE field
The PAGE CODE field is defined in SPC-5 and shall be set to the value defined in table 433.
PAGE LENGTH field
The PAGE LENGTH field is defined in SPC-5 and shall be set to the value defined in table 433.
NUMBER OF CYLINDERS field
The NUMBER OF CYLINDERS field defines the number of physical cylinders used for data storage. This may or may not include spare cylinders
set aside for flaw reallocation. See individual drive’s Product Manual, Volume 1, which specifies what the drive reports.
The drive uses some additional cylinders for storing drive parameters, defect lists, or for diagnostic purposes. These are not accessible by the
user.
NUMBER OF HEADS field
The NUMBER OF HEADS field indicates the maximum number of data (read/write) heads on the drive.
STARTING CYLINDER—WRITE PRECOMP, STARTING CYLINDER—REDUCED WRITE CURRENT, DRIVE STEP RATE, and LANDING ZONE
CYLINDER fields
Not applicable.
RPL (rotational position locking) field
Not supported.
ROTATIONAL OFFSET field
Not supported.
MEDIUM ROTETION RATE field
On MODE SENSE command, these bytes return drive nominal rotation rate in revolutions per minute for synchronous spindle operation. The
bytes have no meaning for MODE SELECT.
See individual drive’s Product Manual, MODE SENSE Data clause, for changeable values.