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 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=
-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.
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