Quick Reference Guide

Mandatory Options
and Arguments
Optional Parameters Valid Parameters
Arguments
Description
-ctrl -ac=cvd -
c=id -ad=
ch:targ,ch:tar
g, ... [or
ch:targ:encl,.
..]
or
controller
action=
createvdisk
controllerid=
id adisk=
channel:target
: lun,
channel:target
: lun,...
[or
channel:target
:
enclosure,...]
-rp or
readpolicy
ra, ara, nra, rc, nrc
CAUTION: If the controller is changed
from SCSI to RAID mode, expect data loss
to occur. Back up any data you want to
save before changing the modes.
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 or not
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:tar
g, ... [or
ch:targ:encl,.
..]
or
controller
action=
createvdisk
controllerid=
id adisk=
channel:target
: lun,...
channel:target
: lun,...
-sp or
spanlength
<number>
Creates a virtual disk comprised of the
properties supplied. The -spoption is optional
and can be the 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 specified spanlength.
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