Users Guide

Balanced Power
Savings
Spin down is enabled only for uncongured and hot spare disks.
Maximum Power
Savings
Spin down is enabled for congured, uncongured, and hot spare disks.
NOTE: The maximum power savings mode is not supported by the H330 PERC card.
Customized Power
Savings
All power savings features are customizable. You can specify a Quality of Service window during which the
congured disks are excluded from spin-down.
NOTE: The customized power savings mode is not supported by the H330 PERC card.
Congured spin down delay
NOTE: The Congured Spin Down Delay option is not applicable for the No Power Savings mode.
The amount of time to wait before spinning down disks can be set using Congured Spin Down Delay. The minimum value of the timer is
30 minutes (default) and the maximum is one day. Disks are spun down automatically and spun up when accessed. All disks are spun up on
reboot.
NOTE: There is a delay in I/O operations when a congured disk is being spun up.
Types of virtual disk initialization
PERC 9 series supports two types of virtual disk initialization:
• Full Initialization
• Fast Initialization
CAUTION
: Initializing virtual disks erases les and le systems while keeping the virtual disk conguration intact.
NOTE: The following initialization operations are not applicable for non-RAID disks.
Full initialization
Performing a full initialization on a virtual disk overwrites all blocks and destroys any data that previously existed on the virtual disk. Full
initialization of a virtual disk eliminates the need for the virtual disk to undergo a Background initialization (BGI). Full initialization can be
performed after the virtual disk is created.
During full initialization, the host cannot access the virtual disk. You can start a full initialization on a virtual disk by using the Slow Initialize
option in the Dell OpenManage storage management application. For more information on using the HII Conguration Utility to perform a
full initialization, see Initializing virtual disks.
NOTE
: If the system reboots during a full initialization, the operation aborts and a BGI begins on the virtual disk.
Fast initialization
A fast initialization on a virtual disk overwrites the rst and last 8 MB of the virtual disk, clearing any boot records or partition information.
The operation takes only 2–3 seconds to complete, but it is followed by BGI, which takes a longer time to complete. To perform a fast
initialization using the HII Conguration Utility, see Initializing virtual disks.
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Features