5257/5257acl tape drives, High capacity features, Backward read compatibility (brc) transfer rates – HP NonStop G-Series User Manual
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Overview and Features
1 -2
5257/5257ACL Tape Drives
5257/5257ACL Tape Drives
The 5257/5257ACL tape drives are a high performance, high capacity, streaming
cartridge tape product designed for use on midrange and high-end computing systems.
These drives provide 110 GB of storage capacity, with transfer speeds of 11 MB/second.
High Capacity Features
The 5257/5257ACL tape drives accept the Super DLTtape 1 cartridge. Native and
compressed capacity ranges for the Super DLTtape 1 cartridge are:
•
Native storage capacity = 110 GB
•
Compressed storage capacity = 220 GB (2:1 compression ratio)
In accordance with industry practice, a typical compression ratio of 2:1 is quoted. Actual
compression ratios achieved are dependent on the redundancy of data files being
recorded.
Backward Read Compatibility (BRC) Transfer
Rates
A backward read compatibility feature is available for the 5257/5257ACL drive which
allows it to read formats written on DLTtape IV type media. Transfer rates quoted are
nominal reading uncompressed data.
Length
Width
Height
Weight
5257
27 3/8 in
8 3/4 in
7 in
24 lbs
5257 ACL
27 1/4 in
17 9/16 in
7 1/8 in
55 lbs
Media Format (Uncompressed)
BRC Transfer Rate (Nominal, native)
(40 GB) Benchmark drive type DLT -1
3.0 MB/second
(40 GB) DLT 8000
4.0 MB/second
(35 GB) DLT 7000
3.5 MB/second
(20 GB) DLT 4000
1.5 MB/second