NEC Express5800/AT101a, User Manual, Page: 22 / 108

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Notes on Using Your Tape Blade
five years since you purchase, even it is not used.
STORING IMPORTANT DATA
When storing important data or programs, it is strongly recommended that you should prepare and
store the master tape and copy (backup) tape just in case.
Further, we recommend that you verify backup software when saving, and check saved data. For
details on verification, refer to the instruction manual for the backup software you are using.
By doing this, if one of the cartridges causes a read error due to dust or dirt, you can recover the
data from the other cartridge. Thus, you can prevent loss of important data and programs.
MANAGING 3-GENERATION DATA
To store the data on the disk, you should manage the data in the three generations.
To manage the 3-generation data, use three tapes (A, B, C). On the first day, store the data on the
disk in cartridge A. On the second day, store the data in cartridge B. On the third day, store the data
in cartridge C.
This method allows you to protect your important data. For example, if cartridge C
generates a read error, you can use cartridge B to recover the data. If cartridge B generates
a read error, you can use cartridge A to recover the data.
DATA CARTRIDGE STORAGE
Always store data cartridges in a clean location under the specified storage conditions.
Enabling the write-protect feature is recommended when storing data cartridges.
When storing data cartridges for an extended period of time, data should be read periodically in
order to ensure that restoration from backup data is possible at all times.
Storing data cartridges in a different location from the system is recommended.
If both master and spare data cartridges are kept, storing each in a different location is
recommended.
DEFINING BACKUP AND RECOVERY-FROM-ACCIDENT
SEQUENCES
To define the backup sequence, be sure to schedule the backup on the assumption that the data
saved in the data cartridge must always be recovered at the occurrence of an accident. The first step
of operating the backup system is to define the correct sequence of backing up and restoring the data
saved in the cartridge.
Establish the recovery-from-accident sequence and make sure periodically that the sequence is
operated correctly.