Interface Specifications And Requirements For Parallel Scsi Drives; Parallel Scsi Host Bus Adapters (Hbas); Multiple Lun Support - HP BL536A User's & Service Manual

Autoloaders at the same time. In addition, the information shown in TapeAssure is more extensive
than that shown in the RMI.
Command View TL software is installed on a management station. The management station can
also be used to manage HP StorageWorks EML and ESL Tape Libraries. For best performance, the
management station should be in the same physical location and on the same IP subnet as the
Autoloader. Command View TL software is available for download without charge from the HP
website at http://www.hp.com/support/cvtl.
For information on installing and using Command View TL, see the HP StorageWorks Interface
Manager and Command View TL User Guide, available from the HP website at
www.hp.com/support/cvtl.
Command View TL support is included in all Autoloader firmware that supports LTO-5 tape drives.
To find and download the most up-to-date firmware revision, visit the HP website at
www.hp.com/support.

Interface specifications and requirements for parallel SCSI drives

The parallel SCSI Autoloaders use the SCSI interface types described in
Autoloaders use a separate SCSI ID for each tape drive, with dual LUNs on the master drive's SCSI
ID to control the tape drive (LUN 0) and Autoloader robotic (LUN 1). HP recommends that each
Ultrium tape drive be put on its own bus when possible.
Table 6 Parallel SCSI interface types
LTO generation
LTO-2
LTO-3, LTO-4
The parallel SCSI Autoloader incorporates a wide SCSI-2 or SCSI-3 Low-Voltage Differential (LVD)
SCSI bus. Make sure your SCSI host adapter or controller supports these standards.
IMPORTANT:
SCSI bus. Do not put the Autoloader on a narrow (50-pin) parallel SCSI bus because doing so will
severely degrade performance.

Parallel SCSI host bus adapters (HBAs)

For optimum performance, place the Autoloader on its own SCSI bus with a host bus adapter that
can transfer data as fast as the Autoloader can read and write. The HBA must also be supported
by your operating system. Refer to the EBS matrix at
compatibility information.
For LTO-3 or LTO-4 tape drives, use an Ultra 320 HBA.
For LTO-2 tape drives, use an Ultra 320 or Ultra 160 HBA.
IMPORTANT:
Autoloader performance. A single-ended SCSI host bus adapter severely degrades Autoloader
performance and limits cable length. Also, if any SE devices are on the SCSI bus, all of the devices
on the bus slow down to SE speed, severely degrading performance.

Multiple LUN support

The Autoloader uses a single SCSI ID and two logical unit numbers (LUN). LUN 0 controls the tape
drive and LUN 1 controls the robotic. The Autoloader requires an HBA that supports multiple LUNs.
If multiple LUN support is not enabled, the host computer cannot scan beyond LUN 0 to discover
the Autoloader. It just sees the tape drive.
10 Features and overview
SCSI Interface
Ultra 160 SCSI LVD/SE
Ultra 320 SCSI LVD
The Tape Autoloader is NOT compatible with a high-voltage differential (HVD)
Do not connect an Ultrium tape drive to an SE SCSI bus, as it severely degrades
Table 6 (page
http://www.hp.com/go/ebs
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10). The
for current HBA