7-1
7. Handling of Disk Array Unit
This chapter describes how to handle the disk array unit.
7.1
Notes on Handling of Disk Array Unit
Note the following in use of the disk array unit. Incorrect handling of the disk array unit may cause the
unit to be defected and/or some data to be broken.
If the ACCESS LED (green) on the controller lights or flashes, the disk access
operation is indicated on the host system, or the initialization is being executed, do
not turn on/off the powers of the disk array unit or host system. Do not reset the host
system.
If the ACCESS LED (green) on the controller lights or flashes and the disk access
operation is indicated on the host system, do not give vibrations and shocks to the
disk array unit.
Because the disk array unit is a precision device, it shall not be subject to hard
vibration or shock.
The features of the disk array unit are effective only for the hardware failure (e.g., the
hard disk is physically damaged or inoperative). The software failure (e.g., the data is lost
or rewritten due to program excursion) is not covered by these features. When the
software failure would occur, the system could seriously be damaged. To minimize the
damage, be sure to back up the data periodically.
It is recommended that important files are backed up to magnetic tapes. This enables the
damage to be minimized in case of emergency including sudden vibration or shock and
power shutdown caused by power interruption.
