Reference Guide

Mandatory Options
and Arguments
Optional Parameters Valid Parameters
Arguments
Description
• c — (Cache I/O) All reads are buffered in
cache memory.
NOTE: Cache policy is not supported on
controllers that do not have a battery.
Valid arguments for disk cache policy are:
• d — Disable
• e — Enable
The -cp option is optional and can be added
to the command line in any order after the
mandatory option combination.
-fd or
failoverdrive
ch:targ, ch:targ, ... or
ch:targ:lun,... or
ch:targ:enc
channel:target, or
channel:target:l un, or
channel:target:
enclosure
Sets the failover drive for the virtual disk. The
-fd option is optional and can be added to
the command line in any order after the
mandatory option combination.
NOTE: From DTK 2.4 onwards, the -fd
option creates dedicated hot spares
instead of global hot spares. For
information about setting global hot
spares, see Assigning, Unassigning, And
Listing Global Hot Spares.
For SCSI controllers, the value of LUN should
always be 0.
For SAS controllers, the value of enclosure
can be non-zero, in which case you must
specify values for channel, target, and
enclosure.
-r or -raid
0, 1, 5, 6, 10, 50, 60
Sets the RAID type or level for the virtual disk.
NOTE: If this option is not specified for
any RAID controller, RAID 0 is taken as
the default.
The valid arguments are:
• 0 — RAID 0 uses data striping, which is
writing data in equal-sized segments
across the array disks. RAID 0 does not
provide data redundancy.
• 1 — RAID 1 is the simplest form of
maintaining redundant data. In RAID 1,
data is mirrored or duplicated on one or
more drives.
• 5 — RAID 5 provides data redundancy by
using data striping in combination with
parity information. Rather than dedicating
a drive to parity, the parity information is
striped across all disks in the array.
• 6 — RAID 6 is an extension of RAID 5 and
uses an additional parity block. It uses
115