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Attach/Detach Packet (all devices)
7-17
7
Old Packet Supported for Compatibility
Even Byte \
Odd Byte \
attributes (byte offset
$10).
$29 xxxxxxxx Alternate cylinders
defines the number of
alternate cylinders
per disk that are to be
reserved at the end of
the disk for
alternates.
NOTE:
1. Refer to Chapter 3.
FC B8 74 30
+$00 Controller LUN Device LUN
+$02 Status Byte 0 Status Byte 1 (Note 1)
+$04 0 0 Step Rate
+$06 0 0 Number of Heads
+$08 Number of Cylinders
+$0A Precompensation Cylinder
+$0C Logical Sectors per Track
+$0E 0000
+$10 SCSI Disk Attributes
+$12 Controller Type Drive Type
+$14 0 0 Function Code (08, 0C)
+$16 Interrupt Level Vector Number
+$18 Status Byte 2 Status Byte 3 (Note 1)
+$1A 0 0 Retry Count
+$1C Physical Bytes per Block
+$1E Alt Sectors per Zone No. Alt Cyls to Reserve