Dell H310 User Manual

Contents

Dell H310 User Manual Manual pdf 22 page image

Physical Disk Failure DetectionFailed physical disks are detected and rebuilds automatically start to new disks that are inserted into the same slot.Automatic rebuilds can also happen transparently with hot spares. If you have configured hot spares, the controllersautomatically try to use them to rebuild failed physical disks.Using Persistent Hot Spare SlotsNOTE: The persistent hot spare slot feature is disabled by default.The PERC H310, H710, H710P, and H810 cards can be configured so that the system backplane or storage enclosure diskslots are dedicated as hot spare slots. This feature can be enabled using the Dell OpenManage storage managementapplication.Once enabled, any slots with hot spares configured automatically become persistent hot spare slots. If a hot spare diskfails or is removed, a replacement disk that is inserted into the same slot automatically becomes a hot spare with thesame properties as the one it is replacing. If the replacement disk does not match the disk protocol and technology, itdoes not become a hot spare.For more information on persistent hot spares, see the Dell OpenManage documentation at dell.com/support/manuals.Physical Disk Hot SwappingNOTE: To check if the backplane supports hot swapping, see theOwner’s Manual of your system.Hot swapping is the manual replacement of a disk while the PERC H310, H710, H710P, or H810 cards are online andperforming their normal functions. The following requirements must be met before hot swapping a physical disk:• The system backplane or enclosure must support hot swapping for the PERC H310, H710, H710P or H810 cards tosupport hot swapping.• The replacement disk must be of the same protocol and disk technology. For example, only a SAS hard drive canreplace a SAS hard drive; only a SATA SSD can replace a SATA SSD.• The replacement disk must be of equal or greater capacity than the one it is replacing.Using Replace Member And Revertible Hot SparesThe Replace Member functionality allows a previously commissioned hot spare to be reverted to a usable hot spare.When a disk failure occurs within a virtual disk, an assigned hot spare (dedicated or global) is commissioned and beginsrebuilding until the virtual disk is optimal. After the failed disk is replaced (in the same slot) and the rebuild to the hotspare is complete, the controller automatically starts to copy data from the commissioned hot spare to the newly-inserted disk. After the data is copied, the new disk is a part of the virtual disk and the hot spare is reverted to being aready hot spare. This allows hot spares to remain in specific enclosure slots. While the controller is reverting the hotspare, the virtual disk remains optimal.NOTE: The controller automatically reverts a hot spare only if the failed disk is replaced with a new disk in thesame slot. If the new disk is not placed in the same slot, a manual Replace Member operation can be used to reverta previously commissioned hot spare.NOTE: A Replace Member operation typically causes a temporary impact to disk performance. Once the operationcompletes, performance returns to normal.22