Flexraid virtual sizing, Checking data consistency – Dell PERC 4/DC User Manual
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The pre-loaded drive should now become an array element.
7.
Press <Enter>.
You have now declared the pre-loaded drive as a one-disk array.
8.
Set the Read Policy and Cache Policy on the Advanced Menu.
9.
Exit the Advanced Menu.
10.
Highlight Accept and press <Enter>.
Do not initialize.
11.
Press <Esc> and select Yes at the Save prompt.
12.
Exit the configuration utility and reboot.
13.
Set the host system to boot from SCSI, if such a setting is available.
FlexRAID Virtual Sizing
The FlexRAID Virtual Sizing option can no longer be enabled on PERC 4/SC or PERC 4/DC. This option allowed Windows
®
NT and Novell
®
NetWare
®
5.1 to
use the new space of a RAID array immediately after you added capacity online or performed a reconstruction.
FlexRAID Virtual Sizing is in the BIOS Configuration Utility. If you have this option enabled on older cards, you need to disable it, then upgrade the firmware.
Perform the following steps to do this:
1.
Go to the
2.
Download the latest firmware and driver to a diskette or directly to your system.
The download is an executable file that generates the firmware files on bootable diskette.
3.
Restart the system and boot from the diskette.
4.
Run pflash to flash the firmware.
Checking Data Consistency
Select this option to verify the redundancy data in logical drives that use RAID levels 1, 5, 10, and 50. (RAID 0 does not provide data redundancy.)
The parameters of the existing logical drives appear. Discrepancies are automatically corrected when the data is correct. However, if the failure is a read error
on a data drive, the bad data block is reassigned and the data is re-generated.
Perform the following steps to run Check Consistency:
1.
Select Check Consistency from the Management Menu.
2.
Press the arrow keys to highlight the desired logical drives.
3.
Press the spacebar to select or deselect a drive for consistency checking.
4.
Press <F2> to select or deselect all the logical drives.
5.
Press <F10> to begin the consistency check.
NOTE:
FlexRAID virtual sizing is not supported on PERC 4e/DC.
NOTE:
Dell recommends that you run periodic data consistency checks on a redundant array. This allows detection and automatic replacement of bad
blocks. Finding a bad block during a rebuild of a failed drive is a serious problem, as the system does not have the redundancy to recover the data.