5257/5257 ACL Installation and User's Guide for NonStop S-Series Tape Enclosures

Overview and Features

5257/5257ACL Installation and User's Guide for NonStop Himalaya S-Series Tape Enclosures—522344-001

1-2

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