The Ultrium 3 and later tape drives include the WORM feature, which is
supported by the IBM System Storage LTO WORM Data Cartridge (formerly the
IBM TotalStorage 3589 Ultrium Tape Cartridge Models 028 and 029). All IBM
Ultrium 3 tape drives with firmware levels of 54K1 or higher and all later Ultrium
drives support the WORM function. An Ultrium 3 or later tape drive with WORM
capability can recognize WORM-compatible media. Information and the required
drive firmware can be found at:
http://www.ibm.com/servers/storage/support/lto/3584/downloading.html
The IBM System Storage LTO WORM Data Cartridge is only for use on Ultrium 3
and later tape drives with WORM capable-microcode. The cartridge is designed for
applications such as archiving and data retention, and is also suitable for
applications that require an audit trail. The cartridge works with the Ultrium 3 and
later tape drives to prevent the alteration or deletion of user data. Additionally,
IBM has taken the following steps to reduce tampering with data:
v The bottom of the WORM cartridge is molded in a color (gray) that is different
from rewritable cartridges.
v A unique format is factory-written on each WORM cartridge.
v The WORM cartridge's memory, along with its unique format, protects the
WORM character of the media.
Based on LTO technology, the format for the LTO WORM data cartridge provides
the following capacities:
Table 52. LTO WORM cartridge capacities
Cartridge type Native capacity Compressed capacityâ€
Ultrium 6 2 500 GB (2 328.31 GiB) 6.25 TB (5.68 TiB)
Ultrium 5 1 500 GB (1396.98 GiB) 3 TB (2.73 TiB)
Ultrium 4 800 GB (745.05 GiB) 1 600 GB (1490.12 GiB)
Ultrium 3 400 GB (372.53 GiB) 800 GB (745.05 GiB)
†The compressed capacity for the Ultrium 6 cartridge uses a 2.5:1 compression ratio. The
compressed capacity for Ultrium 5 and earlier Ultrium cartridges use a 2:1 compression
ratio.
146 IBM System Storage TS3500 Tape Library with ALMS: Introduction and Planning Guide
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