Hard Disk Drives; Handling Hard Disk Drives - Cisco C880 M4 Operating Manual

5. Hard Disk Drives

The storage subsystem can accommodate up to 24 2.5" hard disk drives. If it is equipped, e.g. with 24 300
Gbyte hard disk drives, approximately 7.2 Tbyte hard disk memory is available as a maximum within one
housing.
The hard disk drives are built into a frame which allows defective hard disk drives to be replaced
(hot-plug) or new hard disk drives to be added during operation.
The "hot-plug" function can only be performed together with a corresponding RAID configuration. Further
information about the RAID configuration or RAID level can be found in the disk array controller
documentation.
A hard disk drive may only be replaced if it is inactive (see description of the LEDs in the
LEDs of the Hard Disk Drives
The hot-plug procedure increases the availability of the system operation and guarantees a high degree
of data integrity and protection against failure.

5.1. Handling Hard Disk Drives

Hard disk drives are highly sensitive electromagnetic 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 hard disk drives only within the limits stipulated in the specification.
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When transporting hard disk drives (even over short distances), always use the original packaging
●
(ESD labeling).
Never expose a hard disk drive to a temperature shock. Avoid the formation of condensation inside and
●
on the outside of the hard disk drives. The hard disk drives may be exposed only to defined
temperature and climatic conditions.
Hard disks must be put on antistatic mats with cushion. Never put an HDD on an other hard disk or
●
directly on metallic desks. Keep enough distance between hard disks to prevent the contact of two
disks at handling.
Always put the hard disk drive down carefully, with its largest surface facing downwards, to avoid the
●
danger of tipping over.
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14) or has been marked as defective in the management tool.
Operating Manual
5.1Handling Hard Disk Drives
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