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5 Cautions Concerning Backup 79
E
5
Cautions Concerning Backup
This chapter explains the points to note about backup operations for this product.
Ejecting the data cartridge after backup
Do not leave the data cartridge in this product. Doing so makes the data cartridge wear faster, because
the longer it is used, the faster it wears. 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 easily be affected by
suspended particles of dust. Insert the data cartridge just before the backup operation, and remove it
immediately after the operation.
Data compression rate
This product has a data compression function included in the hardware.
Although the data compression rate is approximately 200%, it varies depending on the data content.
Data that has already been compressed by software is not effected by this product.
Some backup software has a data compression function prior to transfer, however, do not compress
data by software if the hardware compression function is on.
Backup performance/capacity
The backup performance and backup capacity that can be used in one data cartridge varies depending
on the following factors:
• The conditions (attrition, dust, etc.) of the recording surface of the data cartridge to be used.
• The dust and dirt condition of this product magnetic head
• Data compression rate
• The workload on the server
Points to note during system configuration
When repeatedly using a single data cartridge, all the data can be lost if the backup fails. Also, if a
backup data cartridge becomes damaged, the data cannot be recovered. Damage in the event of a fail-
ure can be minimized if two or more data cartridges are used for backup operation.
Example: Using different data cartridges for each day of the week.