DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1651TAPE
9
Tape Loop-around Tests (#814)
This test extends the Host Adapter Loop-Around test to send data from the Host
Adapter to buffers on the Tape circuit pack and back to the Host Adapter. It may
detect errors related to the Host Adapter, SCSI bus, and the Tape circuit pack. It
is intended to functionally test the Tape Drive circuit pack to the extent possible
without actually writing data to the tape.
This test consists of two sets of tests:
■ Tape Internal Loop-around
Data is generated in the RAM of the Host Adapter and transferred to its
SCSI Data Memory. An SCSI WRITE DATA BUFFERS command is sent to
the Tape circuit pack which causes the Tape Drive circuit pack to copy the
data to its buffers. An SCSI READ DATA BUFFERS command is then sent
by the Host Adapter to the Tape Drive circuit pack which causes the Tape
circuit pack to transfer the data from its buffers back to the Host Adapter’s
SCSI Data Memory. The Host Adapter then copies the data back to its
private RAM where it compares it with the original test data.
NO
BOARD
The tape has been placed in the "uninstalled" state.
1. Verify that a tape cartridge is installed and not write-protected and that
the tape drive is fully inserted and powered up.
2. Attempt a demand reset of the tape.
1
FAIL A Tape diagnostic test failed.
1. Verify that a tape cartridge is installed and not write-protected.
2. If a tape was inserted, remove it and clean the Tape Heads.
3. If the test continues to fail, replace the Tape Cartridge. Wait for the
retension pass to complete. If the test succeeds, issue the backup disk
command.
4. If the test continues to fail, replace the Tape circuit pack.
5. If the test continues to fail, replace the MSSNET circuit pack.
PASS The Tape passed all diagnostic tests. Check other test results to see if it is
operating correctly.
1. See the MSS Error Actions table at the end of the section on TAPE.
Table 9-621. TEST #813 Tape Diagnostic Test — Continued
Error
Code
Tes t
Result Description/ Recommendation
Continued on next page
