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The HDD Subsystem
System Components and Expansions
The following applies if hard disk drives are operated on a RAID controller:
–
RAID level 0 and 7
Rebuild is not possible. If a hard disk drive fails, its data is lost.
–
RAID level 1 and 5 without standby hard disk drive
Data rebuild on the new hard disk is carried out automatically when the old
hard disk drive is swapped.
–
RAID level 1 and 5 with standby hard disk drive
A standby hard disk drive is automatically enabled as a replacement for the
defective hard disk drive and the data of the defective hard disk is rebuilt on
the new hard disk.
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Read the documentation for the new hard disk drive.
8.1.1
Handling Hard Disk Drives/HDD Modules
Hard disk drives incorporated in the HDD modules are highly sensitive electro-
magnetic devices and must be handled with great care. It is extremely likely that
an incorrect handling will lead to a partially and/or total failure of the hard disk
drives.
These failures will result in data errors and to loss of data or to total destruction
of the hard disk drive.
Please observe following rules, which will help to avoid the occurrence of this
type of problems:
●
Store and transport HDD modules only within the limits stipulated in the
specification.
●
When transporting HDD modules (even over short distances), always use
the original packaging (ESD labeling).
●
Never expose a HDD module to a temperature shock. Avoid the formation of
condensation inside and on the outside of the hard disk drive.
The hard disk drives may be expose only to defined temperature and
climatic conditions.
●
Always put the HDD module down carefully, with its largest surface facing
downwards, to avoid the danger of tipping over.
