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Table 8–17: TL881 and TL891 MiniLibrary Performance and Capacity Comparison
TL881 MiniLibrary TL891 MiniLibrary
Configured
for
Maximum:
Number of
Base Units
ab
Number of
Data Units
c
Transfer
Rate
d
Storage
Capacity
e
Transfer
Rate
f
Storage
Capacity
g
Performance
50
15 MB/sec
(54
GB/hour)
1.32 TB (66
cartridges)
50 MB/sec
(180
GB/hour)
2.31 TB (66
cartridges)
Capacity
14
3 MB/sec
(10.8
GB/hour)
1.8 TB (90
cartridges)
10 MB/sec
(36
GB/hour)
3.15 TB (90
cartridges)
a
Using an expansion unit with a full 16-cartridge magazine.
b
Each base unit has a full 10-cartridge magazine and two tape drives.
c
Using a data unit with full 16-cartridge magazine.
d
Up to 1.5 MB/sec per drive.
e
Based on 20 GB/cartridge uncompressed. It could be up to 40 GB/cartridge compressed.
f
Up to 5 MB/sec per drive.
g
Based on 35 GB/cartridge uncompressed. It could be up to 70 GB/cartridge compressed.
By modifying the combinations of base units and data units, the performance
and total capacity can be adjusted to meet the customers’ needs.
8.12.1.4 DLT MiniLibrary Part Numbers
Table 8–18 shows the part numbers for the TL881 and TL891 DLT
MiniLibrary systems. Part numbers are only shown for the TL881 fast,
wide differential components.
Table 8–18: DLT MiniLibrary Part Numbers
DLT Library Component
Number of Tape
Drives
Tabletop/Rackmount
Part Number
TL881 DLT Library
1
Tabletop 128667-B21
TL881 DLT Library
2
Tabletop 128667-B22
TL881 DLT MiniLibrary
Base Unit
1
Rackmount 128669-B21
TL881 DLT MiniLibrary
Base Unit
2
Rackmount 128669-B22
Add-on DLT 20/40 drive
for TL881
1
N/A 128671-B21
TL891 DLT Library
1
Tabletop 120875-B21
TL891 DLT Library
2
Tabletop 120875-B22
TL891 DLT MiniLibrary
Base Unit
1
Rackmount 120876-B21
8–60 Configuring a Shared SCSI Bus for Tape Drive Use