Tolis Group ArGest TGL1800, User Manual

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For Mac OS X systems that use the Apple Fibre-Channel Utility, direct connection of the library requires
the port the library is plugged into to be set on a 1Gb Arbitrated loop to ensure proper communication to
a tape library.
SAN Connection
All FC switches between the host and the library must be of the appropriate type. A 2Gb switch in the
path may result in performance digression when backing up highly compressible data to a 4Gb tape
drive.
All switches between the host and the library must be zoned appropriately so that the backup server
and the library are the only devices in a single zone. Placing the library into a zone with other servers
will cause intermittent connectivity problems and reduced performance. Connecting the tape library
directly to the backup system does not require zoning of the FC switch.
Planning the Configuration: Parallel SCSI
If you are unfamiliar with configuring parallel SCSI devices, please contact TOLIS Group support.
Follow these general guidelines when planning the SCSI configuration:
• The LTO-3 and LTO-4 TGS-series tape drives are Ultra320 parallel SCSI devices. Only put one
LTO-3 or LTO-4 tape drive on an Ultra320 bus. Putting multiple LTO-3 or LTO-4 tape devices on a
single Ultra320 bus will result in degraded performance. Do not connect a tape drive to an SE SCSI
bus because it will seriously degrade performance.
• The LTO-2 tape drive is an Ultra160 parallel SCSI device. Up to two LTO-2 tape drives can share an
Ultra320 bus or each tape drive can be on its own Ultra160 bus.
• Avoid putting the library on the same SCSI bus as a disk drive or SE device as it can result in
degraded performance of the tape library and drive as well as any attached disk drives.
• The default SCSI ID of the bottom half-height or single full-height drive is 4. The default SCSI ID of
the top half-height tape drive (if installed) is 5.
NOTE : With the release of the Ultrium 5 (LTO-5) tape technology, LTO-5 is not
manufactured in the parallel SCSI format. The Ultrium 4 technology is the last release
of LTO to support the parallel SCSI format.
Changing the SCSI ID
On a parallel SCSI library, if you need to change the SCSI ID for one or both of the tape drives, do so
before connecting the library to the host computer.
1. Attach the power cord to the Library.
2. Remove the shipping lock if you have not already done so.
3. Power on the library by pressing the power button on on the front panel.
4. Once the library has become ready, on the front panel, press ENTER.
5. Press NEXT until the display shows Configuration . Press ENTER.
6. Press NEXT until the display shows Change Drive 1 or Change Drive 2 . Press ENTER to
select the drive that needs a new SCSI ID.
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