CLI Guide

Mandatory Options and
Arguments
Optional Parameters Valid Parameters
Arguments
Description
or
controller
action=
createvdisk
controllerid= id
adisk=
channel:target:
lun,
channel:target:
lun,...
[or
channel:target:
enclosure,...]
Sets the SCSI read policy for the virtual disk. Specify
the SCSI read policy for the logical drive. The valid
arguments are:
• ra — (read-ahead) The controller reads sequential
sectors of the disk when seeking data.
• ara — (Adaptive Read-Ahead) The controller
initiates read-ahead only if the two most recent
read requests accessed sequential sectors of the
disk. If subsequent read requests access random
sectors of the disk, the controller reverts to No-
Read-Ahead policy. The controller continues to
evaluate whether read requests are accessing
sequential sectors of the disk and can initiate
read-ahead if necessary.
• nra — (No-Read-Ahead) The controller does not
read sequential sectors of the disk when seeking
data.
NOTE: The ra, ara, and nra options are
supported on the following RAID controllers
only:
• PERC 5/E Adapter, PERC 5/I Integrated,
PERC 5/i Adapter
• PERC 6/i Integrated, PERC 6/i Adapter,
PERC 6/E Adapter
• rc — (Read-Caching) Enables read
caching.
• nrc — (No-Read-Caching) Disables read
caching.
-ctrl -ac=cvd -
c=id -ad=
ch:targ,ch:targ,
... [or
ch:targ:encl,...]
or
controller
action=
createvdisk
controllerid= id
adisk=
channel:target:
lun,...
channel:target:
lun,...
[or
channel:target:
enclosure,...]
-sp or spanlength <number>
Creates a virtual disk comprised of the properties
supplied. The -sp option is optional and can be added
to the command line in any order after the mandatory
option combination.
NOTE: Spanlength is applicable only for RAID
50 and RAID 60. The minimum permissible
spanlength value for RAID 50 is 3 and for
RAID 60 is 4. The number of array disks for
creating a virtual disk should not be a prime
number and should be divisible by the
specied spanlength.
NOTE: For creating RAID 10, the PERC 9
rmware suggests the layout (number of
array disks) with uneven span (spans with
unequal number of array disks), though in a
span the number of disks remain even. For
example, for 32 disks, RAID 10 is created with
all the disks in one span and for 34 disks,
RAID 10 is created with 16 disks in one span
and 18 disks in the other span.
For SCSI controllers, the value of LUN should always
be 0.
RAIDCFG
193