
22-2
SCSI REFERENCE 1014826
CHAPTER 22—SEND DIAGNOSTIC (1Dh)
22.2 WHAT YOU SEND TO THE LIBRARY
Byte 01, Bit 4 – PF (Page Format)
This field specifies whether the format of the parameter list for the SEND
DIAGNOSTIC command conforms to the page format defined in the SCSI
standard, as follows:
Byte 01, Bit 2 – SelfTest
This bit specifies whether the library should perform its default diagnostic
self-test, as follows:
Byte 01, Bit 1 – DevOffL
This bit specifies whether the library is allowed to perform diagnostic tests
whose results may be detected by subsequent I/O processes (for example unit
reservations, log parameters, or sense data), as follows:
Byte 01, Bit 0 – UnitOffL
This field specifies whether the library is allowed to perform diagnostic tests
that might affect the tape, such as writing data or repositioning the tape, as
follows:
0
The parameter list uses non-page format. This value is only
valid if the SelfTest bit (byte 01, bit 2) is set.
1
The parameter list uses the SCSI page format. This value is
valid for all pages.
0 Perform the diagnostic tests specified in the Parameter List
1
Preform the default diagnostic self-test. The Parameter List
Length must be 0
0
The library may not perform diagnostic tests whose results
may be detected by subsequent I/O processes
1
The library may perform diagnostic tests whose results may
be detected by subsequent I/O processes
0
The library may not perform diagnostic test that might
affect the tape
1 The library may perform diagnostic test that affect the tape
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