Table 6-2. Ultrium data cartridge compatibility with Ultrium tape drive (continued)
Tape Drive
LTO Ultrium Data Cartridges
1500 GB
(Ultrium 5)
800 GB
(Ultrium 4)
400 GB
(Ultrium 3)
200GB
(Ultrium 2)
100GB
(Ultrium 1)
Ultrium 1 Read/Write
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. The LTO Ultrium 5 drive enables
WORM support when a WORM tape cartridge is loaded into the drive.
WORM Media
Because standard read/write media are incompatible with the WORM feature, a
specially formatted WORM tape cartridge (see Figure 6-2) 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.
Ultrium 5 WORM cartridges are two-tone burgundy and silvery-gray.
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 Ultrium 4 800 GB or Ultrium 3 400 GB WORM Tape Cartridge
is unlike that of standard read/write media. This unique format prevents a drive
that lacks WORM-capable firmware from writing on a WORM tape cartridge.
v When the drive senses a WORM cartridge, the firmware prohibits the changing
or altering of user data already written on the tape. The firmware keeps track of
the last appendable point on the tape.
WORM Media Errors
The following conditions cause WORM media errors to occur:
v Information in the servo manufacturer's word (SMW) on the tape must match
information from the cartridge memory (CM) module in the cartridge. If it does
not match, a media Error Code 7 will post on the drive's single-character display
(SCD). An error will also be displayed on the Operator Control Panel.
a67b0024
Figure 6-2. Ultrium Data and WORM Tape Cartridges
Chapter 6. Using Ultrium Media 6-3
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