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dedicated spare is assigned and a disk fails, the restore process starts automatically, if there is enough space available on the dedicated spare. For additional information, see Section 9.6.13, Add or Remove Dedicated Spares, on page 112.
3.12 Global Sparing A global spare is a disk that is assigned as an alternate disk for multiple arrays, instead of
associating it with only one array.
Many arrays can be restored using the global spare disk, as long as it is not already part of the
array and it has enough space available. Unlike a dedicated spare, this type of spare can be
assigned at any time, even while tasks are running on arrays.
Assigning a disk for use as a global spare does not reserve space on that disk. An automatic restore
is not guaranteed if a disk fails.
If there is not enough disk space on the global spare, make room for the fail-over to complete, or
assign a different disk with enough capacity as the spare. If there is enough space available on the
global spare and a disk failure occurs, the restore process starts automatically.
For additional information, see Section 9.6.14, Add or Remove Global Spares, on page 113.