IBM System Storage TS3500, Introduction And Planning Manual

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Table 13. Differences between DPF and CPF (continued)
Characteristic CPF
DPF and Load
Balancing for
Ultrium 2 and newer
tape drives
DPF and Load
Balancing for 3592
tape drives
Notes:
1. SMC = SCSI-3 Medium Changer Specification (library)
2. SSC = SCSI-3 Stream Commands (drive)
3. LUN = logical unit number
4.
Load balancing is not supported on Windows
5.
For Ultrium 2 tape drives, DPF and load balancing do not require a license key on AIX.
6.
Ultrium 4 and newer tape drives do not require license keys at the host when configuring Data Path Failover.
7.
DPF includes target-side failover for dual-ported Ultrium 5 and later tape drives.
The path failover features can be ordered from the factory, or you may order them
as field upgrades. To order features, contact your IBM Sales Representative.
Note: The control path failover feature for Ultrium tape drives is activated by a
license key that you enter at the library operator panel. The data path failover
feature for Ultrium 1, Ultrium 2, and Ultrium 3 tape drives is activated by a license
key that you enter at the host. For Ultrium 4 and newer tape drives, license keys
do not need to be entered at the host when configuring Data Path Failover.
For more information about using these features, see the IBM Ultrium Device
Drivers Installation and User's Guide .
Expanded I/O capacity
This section describes the extra input/output (I/O) stations that you can order for
the TS3500 Tape Library.
To insert cartridges into and remove them from the TS3500 Tape Library (without
requiring a reinventory), the library comes with an I/O station located on the front
door of the base frame models. You can optionally order an additional I/O station
for installation on base frame models.
A base frame cannot combine both the 3592 tape drive and Ultrium tape drive.
However, in a library that mixes frame types, you may insert 3592 tape cartridges
into the lower I/O station of a Model L53, L52, or L32 frame for transport (by the
cartridge accessor) to a Model D23 or D22 frame (your library must contain an I/O
station that will accept 3592 tape cartridges). Similarly, you may insert LTO
Ultrium tape cartridges into the lower I/O station of a Model L23 or L22 frame for
transport (by the cartridge accessor) to a Model D53, D52, or D32 frame (again,
your library must contain an I/O station that will accept Ultrium tape cartridges).
The TS3500 Tape Library also supports an option for 64 additional I/O slots in a
newly purchased Model D23 or D53 frame. A D-frame with I/O installed includes
four independently accessible I/O stations. The D-frame I/O stations increase the
maximum I/O slot capacity from 32 to 224. There is a maximum of three D23 or
D53 I/O frames in a library. The D-frame I/O stations can double the maximum
insert/eject throughput in libraries with a dual accessor. These D23 and D53
Models are compatible with existing Models L22, L32, L52, D22, and D32.
Chapter 1. Introduction
53
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