Group 1 Commands For All Device Types; Compare Command; Copy And Verify Command; Write Data Buffer Command - Seagate ST11200 Product Manual

Product Manual - Disc Drive SCSI-2/SCSI-3 Interface (Vol. 2; Ver. 2), Rev. E
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5.1.2

Group 1 Commands for all device types

The following commands are applicable for all device types, but the disc drive only implements those indi-
cated in the paragraphs following.
OP Code
39h
3Ah
3Bh
3Ch
5.1.2.1 Compare command (39h)
Not Implemented. A "Check Condition" Status is sent if received.
5.1.2.2 Copy and Verify command (3Ah)
Not Implemented. A "Check Condition" status is sent if received.
5.1.2.3 Write Data Buffer command (3Bh)
Bit 7
Byte(s)
0 0
Logical Unit No. [1]
1
2
3 (MSB)
4
5
6 (MSB)
7
8
9 0
The Write Buffer command may be used in conjunction with the Read Buffer command as a diagnostic
function for testing the disc drive's data buffer memory and the SCSI bus integrity. When used in a diagnostic
mode, the medium shall not be accessed during the execution of this command. Additional modes are pro-
vided for downloading and saving executable micro-code.
The function of this command and the meaning of the fields within the Command Descriptor Block depend on
the mode field (Byte 1, data bits 0, 1, 2).
Command Name

Compare Command

Copy and Verify Command

Write Buffer
Read Buffer
Table 5.1.2-1. Write Data Buffer Command
6 5
0 1
0 0
Buffer ID
Buffer Offset
Byte Transfer Length
0 0
4 3
1 1
RSVD
0 0
[3]
0 0
Section
5.1.2.1
5.1.2.2
5.1.2.3
5.1.2.4
2 1
0 1
0 Mode [2]
[5]
[6]
[6]
[6] (LSB)
(LSB)
0 Flag Link
[4]
103
0
1