User Manual

SCSI Commands Reference Manual, Rev. J 296
www.seagate.com Parameters for direct access devices
Table 258 Address Field for Short Logical Block Address Format
Table 259 Address Field for Physical Sector Address Format
ALTSEC (Alternate Sector) bit
1 An Alternate Sector (ALTSEC) bit of one indicates that the translated address is physically located in an alternate sector of the medium. If
the drive cannot determine if all or part of the translated address is located in an alternate sector it shall set this bit to zero.
0 An ALTSEC bit of zero indicates that no part of the translated address is located in an alternate sector of the medium or that the drive is
unable to determine this information.
ALTTRK (Alternate Track) bit
1 An Alternate Track (ALTTRK) bit of one indicates that part or all of the translated address is located on an alternate track of the medium
or the drive cannot determine if all or part of the translated address is located on an alternate track.
0 An ALTTRK bit of zero indicates that no part of the translated address is located on an alternate track of the medium.
TRANSLATED ADDRESS field
The TRANSLATED ADDRESS field contains the address the target translated from the address supplied by the initiator in the SEND DIAGNOSTIC
command. This field shall be in the format specified in the translate format field. The supported formats are shown in Tables 258 and 259.
Bit
Byte
7 6 5 4 3 2 1 0
0
(MSB)
LOGICAL BLOCK ADDRESS
. . .
3
(LSB)
4
0 0 0 0 0 0 0 0
5
0 0 0 0 0 0 0 0
6
0 0 0 0 0 0 0 0
7
0 0 0 0 0 0 0 0
Bit
Byte
7 6 5 4 3 2 1 0
0
(MSB)
CYLINDER NUMBER
1
2
(LSB)
3
HEAD NUMBER
4
SECTOR NUMBER
. . .
7