User's Manual

Action Description

Remove HS Removes a dedicated hot spare from its disk group or a global hot spare from the global

pool of hot spares.

Rebuild

Select

Rebuild to rebuild one or more failed physical disks. For information on performing a physical disk rebuild, see the

topic

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/support/manuals.

The listed rates in the following table were taken during single disk failure with no I/O present on a PERC H810 card

connected to a single PowerVault MD1220 enclosure. 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 9. Estimated Rebuild Rates

RAID Level Number of Hard Drives 7.2K RPM 6 Gb/s  SAS Hard

Drive

15K RPM 6 Gb/s  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

Controller Management (Ctrl Mgmt)

The

Controller Management screen (Ctrl Mgmt) displays the product name, package, firmware version, BIOS version,

boot block version, controller ID, security capability, and security key presence. Use the screen to perform actions on

the controller and BIOS. You can perform functions such as enable or disable the controller BIOS, enable or disable the

BIOS during bootup in the event of BIOS errors, and enable or disable the option to Auto Import. In addition, you can

select a virtual disk from which to boot, and select default settings.

Controller Management Actions

The following table describes the actions you can perform on the

Ctrl Mgmt screen.

Table 10. Controller Management Options

Option Description

Enable Controller BIOS

Select the option to enable the controller BIOS. If the boot

device is on the RAID controller, the BIOS must be

enabled.

Disable the BIOS to use other boot devices.

In a multiple controller environment, you can enable BIOS

on multiple controllers. However, if you want to boot from

a specific controller, then enable the BIOS on that