Seagate ST118202LC Service Manual download pdf (Page 31)

U26140-J-Z146-3-76 21

4 mm MTC drives Handling 4 mm magnetic tape cartridges

3.5 Handling 4 mm magnetic tape cartridges

V Only use 4 mm magnetic tape cartridges which bear the symbols DDS

(Digital Data Storage) and MRS III (Media Recognition System). The use

of other cartridges can lead to incorrect operation. Refer to the chapter

“Accessories” on page 87 for a list of suitable 4 mm magnetic tape

cartridges. It is not possible to read or write to DAT audio tapes.

In order to achieve the best possible recording quality, it is recommended

that the magnetic tape cartridges supplied by your local Fujitsu Siemens

Computers office are used (see the chapter “Accessories” on page 87).

These cartridges are precisely matched to the characteristics of the

drive.

Figure 11: The symbols found on admissible magnetic tape cartridges

V 4 mm magnetic tape cartridges should only remain in the MTC drive for

as long as necessary. Store the cartridges in their original packaging,

which provides ideal protection against dust.

Magnetic tape cartridges can be ordered directly by calling your local Fujitsu

Siemens Computers office (see the chapter “Accessories” on page 87).

3.5.1 Life of a magnetic tape cartridge

The life of a cartridge depends on the frequency with which the tape passes the

read/write head. The number of “head passes” is proportional to the quantity of

data transferred.

The following applies to 4 mm cartridges.

A maximum of 1500 head passes can be performed.

One backup requires three passes of the tape, since the tape is deleted, written

and then rewound. This means that approx. 500 backup operations are

possible.

If, however, each of these backups is read once, the life of a 4 mm cartridge is

reduced to approx. 250 backup runs.

Digital

Data

Storage

Digital

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Seagate ST118202LC Service Manual Page 31