door). Additionally, two LED indicators are provided for each I/O station in a D-frame in
order to indicate if the I/O station is empty or full and if the I/O station door is locked or
unlocked. This plant feature reduces the frame storage slot capacity by 160 for a Model D23
and by 176 for a Model D53. The I/O stations increase the maximum library I/O slot
capacity from 32 to 224. The multiple I/O stations can double the maximum insert and eject
throughput since both accessors can be used. The D23 and D53 models remain compatible
with existing Models L22, L32, L52, D22, D32, and D52.
The models of the TS3500 Tape Library vary depending on the type of media they contain
and whether the frame is a service bay, a base frame, or an expansion frame. Table 1 lists
each frame and its characteristics.
Table 1. TS3500 Tape Library frame models
Frame
model Type Depth
Media type and
capacity Other
HA1
Service Bay
A
Short N/A N/A
• Required when an
optional second accessor
is ordered
• Contains slots for
diagnostic cartridges only
L22 Base frame Short 3592
Up to 12
drives and
up to 260
cartridges
• May require L23 model
conversion OR
installation of FC 1700
1
L23 Base frame Short 3592
Up to 12
drives and
up to 260
cartridges
• Equipped with the
enhanced frame control
assembly
• Optionally equipped
with TS7700 backend
switches
D22
Expansion
frame
Short 3592
Up to 12
drives and
up to 400
cartridges
• Optionally configured
as service bay B
• May require D23 model
conversion OR
installation of FC 1701
1
D23 Expansion
frame
Short 3592 Up to 12
drives and
• Optionally equipped
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