5 Cautions Concerning Backup
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5
Cautions Concerning Backup
This chapter explains the points to note about backup operations for this product.
Operation Check Sheet
Items that need to be checked in regards to everyday backup operations (cleaning operations, data
cartridge management, device environment etc.) are listed in "Appendix A Operation Check
Sheet(Installation/Operation Check)" (
pg.85). Use this check sheet to check operations.
Ejecting data cartridges (required operation)
• Eject the data cartridge after backup.
• Eject the data cartridge after restarting the server or when the power is off.
• Do not leave the data cartridge in this product.
CAUTION
Data cartridges can be ejected both manually and automatically. (
- This product writes management information to the tape when the cartridge is being ejected.
Therefore, if the power is turned off while the tape is inside, a tape to which no management
data has been written will be created and problems such as data restore failure will occur (errors
will occur in system disaster recovery, additional backup, merge operations and scan
operations).
- If the server is started with a data cartridge left in this product, the OS and backup software will
note be correctly recognized. Eject the cartridge from this product before turning off the power
supply or restarting the server.
- The tape recording surface of the data cartridge is exposed when inserted in this product and if it
is left in this state for a long time it will become easy for it to be affected by suspended particles
of dust. Insert the data cartridge just before backup (or restore) operations, and remove it
immediately after the operation.
Data compression rate
Although the data compression rate is estimated to be approximately 200%, it varies depending on
the data contents. For the data that was already compressed by software, the compression effects by
this product cannot be expected.
• Always eject the data cartridge after backup.
