Adding Or Replacing Hard Disks; Adding Hard Disks - Intel D39172-003 User Manual

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Adding Hard Disks

Caution: Reconfiguring your storage system disks deletes all the data on your storage system.
Caution: If the RAID has failed—that is, if so many disks have failed or been removed that the
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Intel® Entry Storage System SS4000-E User Guide

Adding or Replacing Hard Disks

The effect of adding hard disks to your storage system varies, depending on the disk
configuration you chose when you configured the system and the current state of the
existing disks.
For example, in a linear configuration, you can add a new disk at any time, and data can
be written to that disk as soon as it is added. (Access to the disks is temporarily interrupted
while the disk is being added.) Whether you previously removed a disk or one of the other
disks failed makes no difference.
In a RAID configuration, the effect of adding a disk varies, depending on whether the
RAID is in a normal or degraded state (as indicated on the Disks page). A normal state
indicates that the RAID is functioning properly. A degraded state indicates that one or
more disks have been removed or failed, but because of the data protection offered by the
RAID, you can continue to access all the data. (RAID 0 offers no data protection.)
In a normal state, you cannot add a disk to a RAID 0 or RAID 1 configuration. Any disk
that you install will not be used unless you subsequently reconfigure the storage system
(as described in "Reconfiguring Your Storage System Disks" on page
However, if you currently have three disks and a RAID 5 configuration, you can add a
fourth disk as a spare (essentially changing from RAID 5 to RAID 5 + spare while
retaining all your existing data).
In a degraded state, you can add a disk to a RAID at any time, and the new disk will be
rebuilt to replace the disk that was removed or failed.
RAID can no longer function—you must either re-install the disks or reconfigure the entire
storage system, deleting all the data on your system.
Adding or Replacing Hard Disks
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