Sun Microsystems Enterprise Tape Library 7/3500, Field Service Manual

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54 Sun Enterprise Tape Library 7/3500 Field Service Manual • July 1997
Host Interface Failure MAP
Replace bad tape drive interface PWA (see “Tape
Drive Interface PWA” on page 130). Retest OK?
Possible error codes to indicate a host interface
failure to communicate:
Error code: B4700
(SCSI parity error).
Error code: B4900 (Invalid message error).
Error code: 65400 (SCSI to host library interface
failure).
Error code: B8f00 (Library unit command timed
out).
Check the external cables and replace if necessary.
Re-seat/Inspect Internal SCSI cables, connectors,
and terminators. Retest OK?
Make sure that the robotic controller and the host
are the only SCSI devices on the bus with proper
termination installed at cable end that plugs into
tape drive 0. Retest OK?
Replace robotic controller PWA (see “Actuator
Driver PWA” on page 148). Retest OK? Reconnect
all SCSI devices to the bus. Retest OK?
Isolate bad tape drive/tape drive interface PWA
from bus by using jumper cables. Reconnect tape
drive interface PWA to bus without tape drive.
Retest OK?
Replace bad tape drive (see “Tape Drive” on
page 127). Retest OK? Reconnect all SCSI
devices to the bus. Retest OK?
See “Online Test
Entry MAP” on
page 52.
Call next level of
support.
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes