Tandberg Data Magnum 224, Руководство по эксплуатации продукта, Страница: 242 / 278

224
P
RODUCT
M
ANUAL
1017472
A
PPENDIX
C—W
RITE
O
NCE
, R
EAD
M
ANY
(WORM) C
APABILITY
Table C-1 lists WORM media specifications.
D
ATA
S
ECURITY ON
WORM M
EDIA
Certain built-in security measures help ensure that the data written on a
WORM cartridge does not become compromised, for example:
The format of an Ultrium 3-400 GB or Ultrium 4-800 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.
When the LTO-3 or LTO-4 tape 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 M
EDIA
E
RRORS
The following conditions cause WORM media errors to occur:
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, the tape drive will report a Media Error code.
If your backup application or operating system returns SCSI sense
information, the Sense information will be
Sense Key (03) Medium
error.
Inserting a WORM tape cartridge into a tape drive that is not compatible
with WORM causes the cartridge to be treated as an unsupported medium.
The tape drive will report a media Error Code
7
77
7
.
Only LTO-3 and LTO-4 tape drives have WORM capability. Inserting a
WORM cartridge into an LTO-2 or an LTO-1 tape drive will produce the
above error.
If you are using an LTO-3 tape drive and receive the above error,
upgrading your LTO-3 tape drive’s firmware to the correct code level
will resolve the problem. The firmware must be at version 54xx or higher
and is available at
www.tandbergdata.com .
Table C-1
WORM tape cartridge specifications
Tape Cartridge Case Color
a
Native Data Capacity
Ultrium 3 WORM Two-toned colored cartridge 400 GB (800 GB at 2:1 compression)
Ultrium 4 WORM Two-toned colored cartridge 800 GB (1600 GB at 2:1 compression)
a
The two-toned coloring allows you to easily distinguish WORM cartridges from Write/Read cartridges.