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Dell PowerEdge RAID Controller 9 User’s Guide H330, H730, and H830

Rebuild

Select Rebuild to rebuild one or more failed physical disks. For information on performing a physical disk rebuild, see Performing A Manual Rebuild Of An Individual Physical Disk.

Several of the controller configuration settings and the virtual disk settings affect the actual rate of rebuild. The factors include the rebuild rate setting, virtual disk stripe size, virtual disk read policy, virtual disk write policy, and the amount of workload placed on the storage subsystem. For information on getting the best rebuild performance from your RAID controller, see the documentation at Dell.com/storagecontrollermanuals.

The listed rates in the following table were taken during single disk failure with no I/O. Rates vary depending on type, speed and number of hard drives present in array; as well as which controller model and enclosure configuration are being used.

Table 1. Estimated rebuild ratesEstimated rebuild rates
RAID Level Number of Hard Drives 7.2 K rpm 12 Gbps SAS Hard Drive 15 K rpm 6 Gbps SAS Hard Drive
RAID 1 2 320 GB/hour 500 GB/hour
RAID 5 6 310 GB/hour 480 GB/hour
RAID 10 6 320 GB/hour 500 GB/hour
RAID 5 24 160 GB/hour 240 GB/hour
RAID 10 24 380 GB/hour 500 GB/hour

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