Users Guide

58 USC and USC - LCE
of data. Failures while a single physical disk is rebuilding in one RAID 6
set
do not lead to data loss. RAID 60 has improved fault tolerance
because
more than half the number of total physical disk must fail for data
loss to occur.
NOTE: The virtual disk size is automatically calculated and displayed in the Size
field. You cannot change the virtual disk size. The disk size may be displayed
inaccurately after you complete RAID configuration for a SAS 6/iR controller.
If you are using the Express Wizard, proceed to "Express Wizard Only -
Assign a Hot Spare" on page 58.
If you are using the Advanced Wizard, click Next and proceed to "Advanced
Wizard Only - Select Physical Disks" on page 59.
Express Wizard Only - Assign a Hot Spare
A hot spare is an unused backup physical disk that can be used to rebuild data
from a redundant virtual disk. A hot spare can be used only with a redundant
RAID level. Hot spares also have requirements for physical disk size. The hot
spare must be as big as or bigger than the smallest physical disk included in
the virtual disk. If the RAID level and physical disk availability do not meet
these requirements, a hot spare will not be assigned.
To assign a hot spare to the virtual disk:
1 Select the Assign a Hot Spare Disk check box or leave the check box clear.
2 Click Next to continue with the following section.
Express Wizard Only - Review Summary
Review the virtual disk attributes you selected before creating a virtual disk.
CAUTION: Clicking the Finish button deletes all existing virtual disks except for
any foreign configurations that you specified should be kept. All data residing on
the deleted virtual disks will be lost.
Click Finish to create a virtual disk with the displayed attributes.
OR
To return to a previous screen to review or change selections, click Back.
To exit the Wizard without making changes, click Cancel. For more control
over the virtual disk attributes, click Cancel and use the Advanced Wizard to
create the virtual disk.c
LC1_4.book Page 58 Friday, October 22, 2010 2:45 AM