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Reserve Sector Implementation
Array configuration data about the drive member (each physical drive on the WD SATA
RAID Controller) and other members in the disk array are saved on a special location on the
hard drives called the Reserve Sector. If any member of the array becomes corrupt or lost, the
redundant configuration data on the other members can be used for rebuilds. Disk array
members do not have a memory of their drive positions. This allows drives to be placed on
different WD SATA RAID Controller connectors or cards within the system without
reconfiguring or rebuilding.
Note: If you use any Third Party Software to re-partition a RAID array, you stand the chance
of erasing or destroying the data contained in the Reserve Sector. This could consequentially
destroy the data contained on the drive.
In some cases the Reserve Sector can be infected or damaged by drive failure, virus, etc. Listed
below are steps on deleting and rebuilding the reserve sector on the drives attached to the
WD SATA RAID Controller.
CAUTION: Before removing the Reserve Sector of the drive(s), back up any existing data.
Removal of the Reserve Sector of any drive may permanently delete all existing data on the
hard drive.
For Mirrored arrays (RAID 1), remove the Reserve Sector from the mirrored drive first (this
will appear during Step 3 below) then rebuild the mirrored array. Remove the Sector on the
Master Drive only as a last resort.
For Striped arrays (RAID 0), removing the Reserve Sector from any of the drives that are
striped will destroy the arrayed data.
To remove the Reserve Sector, follow these steps:
1. During boot up, press
2. Press 2 to View Drive Assignments.
3. Press
up or down keys to highlight the drive where you wish to remove the Reserve
ARROW
Sector.
4. Press
+
1. The highlighted drive will start blinking on the screen.
ALT
F
5. Press
+
. A message will appear that says the reserved sector (which is where array
CTRL
TAB
information is kept) on the disk will be wiped.
6. Press
to confirm.
Y
7. Take the appropriate action:
- For striped arrays, repeat this process for each member of the particular array that is
having a problem. When you are finished, press the Esc key twice to reboot.
- For mirrored arrays, press the Esc key twice to reboot.
8. After rebooting, use EasyBuild to re-create the array outlined in "Creating a Disk Array"
on page 10.
+
to enter the EasyBuild BIOS utility.
CTRL
A
WD SERIAL ATA RAID CONTROLLER
USER MANUAL
EASYBUILD OPTIONS AND FEATURES - 23
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