Installing Tape Drives; Planning The Parallel Scsi Configura- Tion; Planning The Fc Configuration; Planning The Sas Configuration - Overland Storage NEO 200s Getting Started

3 Installing tape drives

The Library can hold up to two full-height or up to four half-height
drives. If the Library will only have one tape drive, install it in the
bottom drive bay. (Tape drives are numbered from the bottom up.)
Remove the drive bay cover. Position the tape drive on the alignment
rails, then slowly slide it into the bay until it is firmly seated. Tighten
the blue thumbscrews with your fingers until the tape drive is secure.
4a Planning the FC configuration
The FC tape drive has two FC ports. Only one port may be used at a
time, but both ports can be connected for path failover if your
application supports path failover.
Direct connection You will need a 2 Gb or 4 Gb FC HBA. A 4 Gb HBA
is recommended for LTO-4 tape drives for optimum performance.
SAN connection All switches between the host and the Library must
be of the appropriate type. A 2 Gb switch in the path may result in
performance degradation when backing up highly compressible data
to a 4 Gb tape drive.
Configure zoning on the Fibre switch so only the backup servers can
access the Library.
NOTE:
See Step 12 for additional FC configuration information. See the 2U
Tape Library and 4U Tape Libraryuser and service guide for instructions
on changing the FC configuration.
4b Planning the parallel SCSI configura-
tion
If you are unfamiliar with configuring parallel SCSI devices, read the
parallel SCSI configuration information in the 2U Tape Library and 4U
Tape Libraryuser and service guide.
Follow these general guidelines when planning the parallel SCSI
configuration:
• The tape drives are Ultra320 parallel SCSI devices. Only attach one
tape drive per Ultra320 bus. Attaching a tape drive on a lower per-
formance bus may degrade its performance. Do not connect an LTO
tape drive to an SE SCSI bus because it will seriously degrade per-
formance.
• Avoid attaching the Library to the same SCSI bus as a disk drive
or SE device.
• The default SCSI ID of the bottom half-height or full-height tape
drive is 4. The default SCSI ID of the top half-height tape drive is
5.
4c Planning the SAS configuration
The server must have a SAS HBA with an external connector.
NOTE:
Most SAS RAID controllers do not support Tape Libraries.
WARNING!
Do not connect the Library to a SAS RAID controller unless the
controller is qualified with the Library. The server might not be able
to boot when the Library is connected to a non-supported SAS RAID
controller.
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