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Data backup
"Data backup" is to copy data stored in a media into another media (e.g., floppy disk, digital audio tape, or
magnet-optical disk).
IMPORTANT:
The floppy disk is a very delicate storage media. Dust or thermal changes, as well as operator's misconduct or
sever failures, may cause loss of data. To avoid loss of data, we recommend that you should make a back-up
copy of your valuable data on a regular basis.
CD-ROM
Keep the following notes in mind to use the CD-ROM for the server:
Press the centre of the storage case to remove the CD-ROM from the case.
Do not drop the CD-ROM.
Do not place anything on the CD-ROM or bend the CD-ROM.
Do not attach any label onto the CD-ROM.
Do not touch the signal side (nothing is printed on this side) with your hand.
Place the CD-ROM with its printed side upward and gently put it on the tray.
Do not scratch the CD-ROM or write anything directly on it with a pencil or ball-point pen.
Do not leave the CD-ROM with foods and drinks, or in a place exposed to cigarette smoke.
Do not leave the CD-ROM in a high-temperature place (e.g., place exposed to direct sunlight or close to a
heater).
When dust or fingerprints are attached on the CD-ROM, wipe the CD-ROM from its centre to edge with a dry
soft cloth slowly and gently.
Use CD cleaner to clean the CD-ROM. Do not use record spray/cleaner, benzene, or thinner.
Keep the CD-ROM in a CD-ROM case when not in use.
Tape Media
The following describes data handling with the DAT, DLT, or AIT optionally available for the server.
Saving your valuable data
When you save your valuable data or programs into the cartridge tape, you should save them into two
cartridge tapes to make the primary and secondary tapes.
This enables you to restore your data from one tape when the other makes a read error, as well as to protect
your valuable data and programs from loss.
Three-generation data management
We recommend that you should employ three-generation data management for data storage.
Three-generation data management uses three cartridge tapes: A, B, and C. You save data to tape A on the first
day, tape B on the second day, tape C on the third day, tape A on the forth day, and so on. That is, you save
data into cartridge tapes cyclically from tape A through C.
This enables you, for example, to use tape B to restore the data when tape C makes a read error. Also when
both tapes B and C make a read error, you can restore your valuable data by using the data stored in tape A.
Make sure to make a back-up copy of every floppy disk, if provided.
B-3
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