User's Manual

Virtual Disks 255
Physical Disks Selected
The Physical Disks Selected section of the screen displays the disks you have
chosen. In this example, two disks are selected.
• Physical disk 0:0
• Physical disk 0:1
Each RAID level has specific requirements for the number of disks that must
be selected. RAID 10, RAID 50, and RAID 60 also have requirements for how
many disks must be included in each stripe or span.
If the controller is a SAS controller with firmware versions 6.1 and later and
you selected RAID 10, RAID 50, and RAID 60, the user interface displays the
following:
• Select All Disks check box—Enables you to select all the physical disks in
all the enclosures.
•
Enclosure check box—Enables you to select all physical disks in the
enclosure.
NOTE: The Select All and Enclosure check boxes enable you to edit spans
after selecting the physical disks that comprise them. You can remove a span
and re-specify a span with different physical disks before proceeding.
• Select Number of Disks per Span —Enables you to select the number of
disks in each span (default =2). This option is available only on SAS
controllers with firmware version 6.1 and later.
NOTE: This option is available only if you did not select Intelligent Mirroring
on the Create Virtual Disk (Step 1 of 4) page.
NOTE: On a SAS controller with firmware version 6.1 and later, RAID 10
supports only even number of disks per span and a maximum of 8 spans with
32 disks in each span.
Let us consider that the controller has three enclosures with six physical
disks each (total number of available disks = 3 x 6 =18 disks). If you select
four disks per span, the controller creates four spans (18 disks/4 disks per
span = 4 spans). The last two disks of the last enclosure is not part of
RAID 10.
Select the number of disks to create a single spanned virtual disk drop
down menu—Enables you to create a single span virtual disk with 22 or 26
physical drives for PERC controllers. This drop down menu appears only if