CLI Guide

Mandatory
Options and
Arguments
Optional
Parameters
Valid Parameters
Arguments
Description
single array. A single hard drive
failure can occur in each of the RAID
5 without any loss of data on the
entire array. Although the RAID 50
has increased write performance,
when a hard drive fails and
reconstruction takes place,
performance decreases, data/
program access is slower, and
transfer speeds on the array are
affected.
• 60 — RAID 60 is a combination of
RAID 6 and RAID 0. A RAID 0 array is
striped across RAID 6 elements. It
requires at least 8 disks.
-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.
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