Quantum LTO-2 - Manual (Page 89)

Chapter 7 Troubleshooting Guide
Problems During Backup/Restore Operations
LTO-2 Half-Height Tape Drive User’s Guide 75
This message means the tape drive does not recognize the cleaning
tape as being of a valid type. You may have purchased a cleaning
tape that is not supported by the tape drive. Purchase a supported
cleaning tape.
If the tape drive issues a message to backup software to instruct you
to clean the tape drive, you may see the message:
“The tape drive needs cleaning:
1. If the operation has stopped, eject the tape and clean the drive.
2. If the operation has not stopped, wait for it to finish and then clean the
drive.
Check the tape drive users manual for device specific cleaning instructions.”
This message means you should use a supported cleaning tape.
Slow Backups 7 There are many factors that can make backups appear to be “slow.” To
achieve the highest possible transfer rate, the LTO-2 half-height tape
drive MUST be attached to a Low Voltage Differential ( LVD ) SCSI
controller capable of a minimum of 80 MB/s and MUST not share the
same SCSI bus as another active SCSI device such as hard drives.
1 Is the tape drive attached to an LVD SCSI controller? This can be
determined by viewing the boot process of the system and looking to
see what controller the tape drive is attached to. There may be boot
log files that can be examined to determine what SCSI controller the
tape drive is attached to.
2
If the tape drive is not attached to an LVD SCSI controller, attach the
tape drive to a LVD SCSI controller to achieve best possible hardware
performance for best possible transfer rate.
3
If the tape drive is attached to an LVD SCSI controller, see whether
the tape drive is the only device on the SCSI cable? This can be
determined by viewing Windows Device Manager, viewing Unix/
Linux logs, or by viewing SCSI controller during system boot up.
4 If other SCSI devices are attached to the SCSI controller and are active
during the time when a backup is performed to the tape drive, have
the tape drive as the only device on the SCSI cable to achieve the best
possible backup performance.