Users Guide

Hot swapping is the manual replacement of a disk while the PERC 10 series cards are online and performing 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 10 series cards to support hot swapping.
• The replacement disk must be of the same protocol and disk technology. For example, only a SAS hard drive can replace a SAS hard
drive and only a SATA SSD can replace a SATA SSD.
Using replace member and revertible hot spares
The Replace Member functionality allows a previously commissioned hot spare to revert to a usable hot spare. When a disk failure occurs
within a virtual disk, an assigned hot spare (dedicated or global) is commissioned and begins rebuilding until the virtual disk is optimal. After
the failed disk is replaced (in the same slot) and the rebuild to the hot spare 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 a ready hot spare. This allows hot spares to remain in specic enclosure slots. While the controller is reverting the
hot spare, 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 the same slot. If the
new disk is not placed in the same slot, a manual Replace Member operation can be used to revert a previously commissioned hot
spare.
NOTE: A Replace Member operation typically causes a temporary impact to disk performance. Once the operation completes,
performance returns to normal.
Controller cache preservation
The controller is capable of preserving its cache in the event of a system power outage or improper system shutdown. The PERC 10 Series
controller is attached to a Battery Backup Unit (BBU) that provides backup power during system power loss to preserve the controller's
cache data.
Cache Preservation With NVC
The Non-Volatile Cache (NVC) allows controller cache data to be stored indenitely. If the controller has data in the cache memory during a
power outage or improper system shutdown, a small amount of power from the battery is used to transfer the cache data to a non-volatile
ash storage where it remains until power is restored and the system is booted.
Recovering cache data
If a system power loss or improper system shutdown has occurred:
1 Restore the system power.
2 Boot the system.
3 To enter the UEFI Conguration Utility, select Managed Preserved Cache in the controller menu. For more information, see Entering
the BIOS conguration utility.
If there are no virtual disks listed, all preserved cache data has been written to the disk successfully.
Battery Transparent Learn Cycle
A transparent learn cycle is a periodic operation that calculates the charge that is remaining in the battery to ensure there is sucient
energy. The operation runs automatically, and causes no impact to the system or controller performance.
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Features