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本帖最后由 TiGi 于 7-26-2012 06:49 编辑
When a drive in a RAID set fails, an array behaves as follows:
If a spare drive is available: The spare automatically replaces the failed drive. Data from the failed drive is reconstructed on the spare and continues to be available. During reconstruction, the set that contains the failed drive is temporarily degraded. After reconstruction, performance returns to normal.
If no spare drive is available: Data continues to be available, but the set is degraded.
If another drive fails in a degraded RAID 10, RAID 5, or RAID 50 set: The member might be set offline, and any volumes and snapshots that have data located on the member are also set offline.
If another drive fails in a degraded RAID 6 set: The member is not set offline but continues to be degraded until the failed drives are replaced. Data is reconstructed on the replacement drives. If the first reconstruction is still underway, performance can be further reduced. After both drives are reconstructed, performance returns to normal.
When you replace a failed drive:
If a spare drive was used: Data has already been reconstructed on the spare drive, so the new drive becomes a spare.
If a set is degraded: Data is reconstructed on the new drive and after reconstruction, performance returns to normal.
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发表于 2014-4-15 10:59:34
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