Bus expansion module
the malfunctioning bus expansion module. Removing the bus expansion module
interrupts the SCSI bus to which the drives are connected. Backups to drives that are
not on the same SCSI bus as the bus expansion module can safely continue.
Spectra Logic recommends shutting down and powering off the host computer
connected to the same SCSI bus as the bus expansion module before removing the
module.
Caution:
Improperly removing a device from a SCSI bus can cause a host
computer to crash. If you decide to leave the host running,
Spectra Logic is not responsible for any damage to data or
equipment.
Identifying a Malfunctioning QIP
A QIP handles all of the communication between the host and the attached SCSI drives.
It also passes robotic control commands from the host to the library's robotics and can
queue drive commands to keep drives streaming data for optimum drive performance.
Most QIP "failures" can be traced to a communication failure somewhere in the
communication path. The following table lists the two most common "symptoms," with
the preferred resolution for each.
Symptom
The QIP shows
"offline" in the front
panel library interface,
and the host can no
longer communicate
with the QIP or the
drives attached to it.
The QIP fails during or
after a library firmware
upgrade.
Backups cannot be continued to the drives associated with
Solution
Reset the QIP as described on page 55. It will most often resume
functioning, which indicates that it experienced a communications
problem with the host. If this problem occurs frequently, locating
the source of the communications problem is the only way to
permanently resolve the issue. The source of the problem could
be bad media, a malfunctioning tape drive, a cable or HBA
problem, or another program or server interrupting
communications. Setting up QIP tracing can help identify the
source of the problem. Do not replace the QIP.
If the QIP does not resume functioning after a reset, then it is
possible that a chip on the QIP failed or that there is another
hardware problem. Replace the QIP.
Check whether the QIP's code is at the current package level (you
can find current package level information on Spectralogic.com).
If it is not, disconnect the QIP from the host and re-run the
firmware upgrade. Then reset the QIP as described on page 55.
If the QIP does not resume functioning, power cycle the library. If
the QIP still does not resume functioning, then replace it.
If the library displays a checksum error, replace the QIP.
Before You Begin
53
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