Hitachi HF-W2000 58 Instruction Manual page 20

SAFETY INSTRUCTIONS (Continued)
• A recovery DVD contains an image file created for the hardware configuration at the time of
purchase. If the hardware configuration has changed from the time of purchase, the OS might not
start after restoration work. Remove all external storage devices to restore the hardware
configuration at the time of purchase before you perform restoration work by using a recovery
DVD. When you use a recovery DVD, all data on the system drive is deleted. Back up your data in
advance as necessary.
• Although this equipment features RAID1 and is thus more reliable than general systems, it is still
vulnerable to the loss of data stored on the HDDs. Permanent data loss is caused not only by
mechanical failures, but also by unexpected power failures or operational errors. To prevent such
data loss, schedule data backup operations, and protect the power source from undesirable
interruptions by using a UPS or other means.
• This equipment is evaluated assuming the use of the specific HDD models authorized by the
manufacturer. Replace HDDs by using only the specific items specified by the manufacturer.
Failure to do so might result in existing data on the HDD being lost. In addition, always observe the
recommended replacement interval for HDDs (See APPENDIX HANDLING OF REPLACEABLE
COMPONENTS).
• Each unit of equipment has its own RAID1 configuration information (such as a serial number). As
such, you cannot use HDDs by swapping them even between two different units of this equipment.
If you attempt to do so, unexpected operation might result from inconsistencies in the configuration
information or other reasons.
• Do not use an HDD previously used in any model as a replacement HDD. If you do, this equipment
might not operate properly or the data on the HDDs might be lost because of configuration
information mismatches or other reasons.
• For a replacement HDD, use a brand-new HDD (an unused HDD) or an HDD to which "Initialize
Drives" has been applied (see 10.6.7 Drive initialization feature).
• Maintaining a RAID1 system requires a high level of expertise. If users make any mistakes during
their work, the data stored on the HDDs might be lost.
• The capacities of drive bay 1 and drive bay 2 must be the same. Do not install HDDs that have
different capacities.
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