IBM AS/400e User Handbook Manual page 394

Removable Storage Media Devices
Previously available storage units and drive units were denoted by feature number (#5400
and #5300 respectively), then later denoted by model types 3494-S10 and D10. The #5300
Drive Unit can be field upgraded to a 3494-D12, which can support 3590-B1A tape drives by
specifying #5302. Both #5400 and #5300 units are supported on the 3494-L10 and L12
Library Control Units.
Additional frames can be attached to the 3494 Model L10 or L12 in any combination of drive
units and storage units, as long as the maximum of seven additional frames is not exceeded.
This provides storage capacity for up to 3,040 ½-inch cartridges (7.3T if 3490E cartridges or
91.2T with 3590-B1A cartridges), and support for up to sixteen 3490-CxA tape drives, or up
to sixteen 3590-B1A tape drives. Both 3490 and 3590 tape drives can be used in the same
3494 Tape Library Dataserver.
The 3494 Tape Library Dataserver Models L10 and L12 attach to the AS/400 system using an
RS 232 Host Attachment (#5211 for a 50-foot attachment or #5213 for a 400-foot attachment)
or using a LAN attachment (#5219 for Token Ring or #5220 for Ethernet). Each AS/400
system attached to a 3494 Tape Library Dataserver must have an RS232 Host Attachment
specified to obtain the licensed code for the Media Library Device Driver (MLDD). The 3494
Tape Library Dataserver can also attach to the IBM RISC System/6000, the IBM ES/9000,
Power parallel SP2, and Sun processors.
An Expansion Attachment Card (#5229) is required to support the fifth to eighth RS232
connections or the fifth to eighth tape control unit. The number of tape control units that can
be attached to the 3494 Model L10 or L12 has been doubled to support up to 16 tape control
units.
Beginning with V4R4, the 3494 Model HA1 is supported by the AS/400 system. The 3494
Model HA1 includes a second library manager and accessor, two service bays, and required
hardware, and is designed for concurrent maintenance. The Model HA1 operates in standby
mode to provide a redundant library manager and accessor or improved availability. With the
Dual Active Accessor (DAA) feature active on the 3494 Models L10, L12, or L14, both
accessors can operate simultaneously to increase mount performance of the library. With two
library managers and dual accessors, and each containing two disk drives for duplication of
the library databases, maintenance can now be performed in most situations on the failing
library control unit component while the 3494 is still available for customer production. The
Model HA1 contains no storage cells for tape cartridges. The 3494-HA1 can be installed on 3,
4, 6, 8, 10, 12, and 16 frame configurations
To expand the number of tape control units that can be attached to the Library Manager, the
Tape Control Unit Expansion feature, #5228, should be specified. One feature can convert
four RS232 host processor connections into four tape control unit connections in either the
Library Manager or the Expansion Attachment Card (#5229). When combined with other
interface features (see the following table), up to 16 tape control units can be connected to
the Library Manager. If all RS232 host processor connections are converted to tape control
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AS/400e System Handbook