DLT2000 SCSI Interface
DLT2000/DLT2700 Cartridge Tape Subsystem 8-115
8.4.21 SEND DIAGNOSTIC (1Dh)
Bit
7
6
5
4
3
2
1
0
0
Operation Code (1Dh)
Logical Unit Number
PF
Rsv’d
Selftst
Dev OfL UnitOfL
Reserved
Byte
(MSB)
Parameter List Length
(LSB)
Unused
Reserved
Flag
Link
1
2
3
4
5
Figure 8-73 SEND DIAGNOSTIC CDB
SEND DIAGNOSTIC tells the drive to perform diagnostic tests on itself.
The Page Format field is not supported and must be zero.
Two separate types of unit resident tests can be accessed:
•
Electronics Self-Test - (Level 1 test) To invoke the diagnostic, a good portion of
the controller hardware and software must be functioning properly. This is the
premise this test is based on: that full power-up testing is not necessary. Therefore,
this test does an extension of the power-up self tests. The code ROM EDC is
verified, two queues used by much of the controller software is checked by
dequeuing and enqueuing items.
If there is a loader attached, a software reset is done on it. This test does not
attempt to write or read data to or from media. When complete, any errors are
posted in the extended Sense Data bytes. This test has an execution time of
approximately 5 seconds.
This test is specified by setting just the Self-Test bit (DevOfL, and UnitOfL both
zero).
•
Write/Read Functionality Test - (Level 2 test). The default version of this test does
the following:
-
Writes 100 32 KB records on track 0.
-
Rewinds the tape.
-
Reads the records.
-
Positions to the beginning of track 1.
Summary of Contents for DLT 2500
Page 18: ...Table of Contents xviii DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem ...
Page 20: ...Revision History xx DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem ...
Page 146: ...Firmware Update From Tape 7 18 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem ...
Page 291: ...DLT2000 SCSI Interface DLT2000 DLT2700 Cartridge Tape Subsystem 8 145 ...
Page 327: ...Sense Key Information C 6 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem ...
Page 345: ...Index 8 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem ...