Capacity Scaling; Worm (Write Once, Read Many); Worm Media; Data Security On Worm Media - IBM System Storage TS3310 Setup And Operator Manual

The label area (
For more information, see "Bar Code Label" on page 8-4.
The insertion guide (
prevents the cartridge from being inserted incorrectly.
All generations of the LTO Ultrium Data Cartridge have a nominal cartridge life of
5000 load and unload cycles.

Capacity Scaling

To control the capacity of the cartridge (for example, to obtain a faster seek time)
issue the SCSI command SET CAPACITY. For information about this command,
refer to the IBM TotalStorage Ultrium Tape Drive SCSI Reference.

WORM (Write Once, Read Many)

Certain records retention and data security applications require a Write Once, Read
Many (WORM) method for storing data on tape. To meet this data storage
requirement, a new WORM feature has been made available on IBM LTO Ultrium
generation 3 drives. The WORM feature can be enabled by upgrading to
WORM-capable drive firmware and using a special WORM tape cartridge.
No physical hardware changes are required to make Ultrium 3 drives compatible
with the WORM feature; however, appropriate WORM-capable drive firmware
must be installed.

WORM Media

Because standard read/write media are incompatible with the WORM feature, a
specially formatted WORM tape cartridge is required. Each WORM cartridge has a
unique, worldwide cartridge identifier (WWCID), which comprises the unique CM
chip serial number and the unique tape media serial number. "Ordering Media
Supplies" on page 8-18 provides information on how to choose and purchase the
appropriate WORM tape cartridges for your library.
Figure 8-2. Ultrium 3 WORM Tape Cartridge

Data Security on WORM Media

Certain built-in security measures help ensure that the data written on a WORM
cartridge does not become compromised, for example:
v The format of an IBM Ultrium 3 400 GB WORM Tape Cartridge is unlike that of
5
in Figure 8-1 on page 8-2) provides a location to place a label.
6
in Figure 8-1 on page 8-2) is a large, notched area that
standard read/write media. This unique format prevents a drive that lacks
WORM-capable firmware from writing on a WORM tape cartridge.
Chapter 8. Using Ultrium Media
8-3