A systems administrator receives an automated alert for an enterprise storage server utilizing a four-drive hardware RAID 10 array configured as two separate mirrored pairs (Pair 1: Drive 0 and Drive 1; Pair 2: Drive 2 and Drive 3). The console reports that Drive 0 experienced a hardware fault and went offline. Before a replacement drive is installed, Drive 3 also fails. Which of the following best describes the operational state of the array and the appropriate initial action?
- The array is degraded but operational; replace the failed drives one at a time and allow the controller to rebuild each mirrored pair from the surviving disks.Cevap
- BThe array has suffered total data failure; initialize all drives, recreate the RAID 10 volume configuration, and restore the storage contents from backup.
- CThe array is locked in read-only mode; execute a high-level format on Drive 0 and Drive 3 to clear file system corruptions and restore full redundancy.
- DThe array is offline; break the RAID configuration in the controller BIOS, clear the cache, and re-stripe all four drives simultaneously.
Cevap
The array is degraded but operational; replace the failed drives one at a time and allow the controller to rebuild each mirrored pair from the surviving disks.
RAID 10 (1+0) combines mirroring and striping. It creates mirrored pairs and stripes data across those pairs. In a four-drive array with Pair 1 (Drives 0 & 1) and Pair 2 (Drives 2 & 3), a loss of one disk in Pair 1 (Drive 0) and one disk in Pair 2 (Drive 3) leaves Drive 1 and Drive 2 containing complete copies of all striped data. The array remains in a degraded state, and replacing the failed drives allows the controller to rebuild redundancy without losing data.
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RAID 10 Fault Tolerance and Degraded Array Recovery