HP StoreEver MSL2024, MSL4048, MSL8048, and MSL8096 Tape Libraries User and Service Guide (AK378-96059, December 2012)

Table Of Contents
2. Click Generate Temporary LTFS License.
NOTE: Download the LTFS software before generating the temporary LTFS license.
To apply the permanent license:
1. Navigate to the RMI Configuration: License Key screen.
2. Enter the license key and then click Submit. The permanent license takes effect when the library
is rebooted.
Interface specifications and requirements for parallel SCSI drives
The parallel SCSI libraries use the Ultra 320 SCSI LVD interface. The libraries 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 library robotic (LUN 1). HP recommends that each Ultrium tape drive be put on its own bus
when possible.
The parallel SCSI libraries incorporate 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: The libraries are NOT compatible with a high-voltage differential (HVD) SCSI bus.
Do not put the library 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 each tape drive on its own parallel SCSI bus with a host bus
adapter that can transfer data as fast as the library can read and write. The HBA must also be
supported by your operating system. For best performance, use an Ultra 320 HBA. For current
HBA compatibility information, see the EBS matrix at http://www.hp.com/go/ebs.
IMPORTANT: Do not connect an Ultrium tape drive to an SE SCSI bus, as it severely degrades
library performance. A single-ended SCSI host bus adapter severely degrades library 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 library uses a single SCSI ID and two logical unit numbers (LUN). LUN 0 controls the tape
drive and LUN 1 controls the robotic. The library 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
library. It just sees the tape drive.
Parallel SCSI HP Smart Array controllers, RAID controllers, and most on-board HBAs do not support
multiple LUNs. For current HBA compatibility information, see the EBS matrix at http://www.hp.com/
go/ebs.
IMPORTANT: The library requires an HBA that supports multiple LUNs, which is also called “LUN
scanning.
Default SCSI IDs
The default SCSI ID for parallel SCSI tape drives is managed by the library. The default SCSI ID
for all full-height tape drives is 4.
The default SCSI ID for half-height tape drives depends on the model.
MSL2024: The default SCSI ID of the bottom drive bay is 4 and the default SCSI ID of the top
drive bay is 5 as shown in Figure 3 (page 15).
14 Features and overview