Storing Important Data; Managing 3-Generation Data; Data Cartridge Storage; Define Disaster Recovery Policy - NEC N8151-143 User Manual

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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

Data cartridges should be stored 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.

Define Disaster Recovery policy

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 disaster recovery sequence and make sure periodically that the sequence is operated correctly.