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286 Appendix PCI RAID Card Command Reference
megaraid -create
R0
|
R1
|
R5
-drive {
0 1 2 3
} [-stripesize
n
]
[-size x
] [-writecache
enable
|
disable
] [-readahead
on
|
off
|
adaptive
]
[-iopolicy
direct
|
cached
] [-log
file
]
Creates a logical drive and adds it to the existing configuration. The RAID level and participating
physical drives’ parameters are required. All other parameters are optional. If
size is not specified,
the remaining size of the array will automatically be used. If
the stripesize and iopolicy
parameters are not specified, the default values are used. The
stripesize parameter is in kilobytes,
and valid stripe sizes are
16
,
32
,
64
, and
128
kilobytes. The size parameter is in megabytes.
You cannot create a logical drive smaller than100 MB. After you create a logical drive, you can change
the cache policy using the
changepolicy command.
Default values are as follows:
Â
stripesize: 64K
 writecache: disabled
 readcache: off
 iopolicy: direct
megaraid -destroyconfig [-
yes
] [-log
file
]
Clears the configuration. If you don’t specify the yes parameter, the computer prompts for
confirmation before clearing the configuration.
megaraid -flash
flashFileName
[-log
file
]
Flashes new firmware from the flash file to the adapter. The new firmware becomes operational only
after the computer is restarted.
megaraid -initialize
ld
-start | -stop | -status [-log
file
]
Initializes, starts, stops, or displays the status (percentage of progress) of a particular logical drive.
The parameter
ld
is the logical drive ID.
megaraid -rebuild
pd
-start | -stop | -status [-log
file
]
Rebuilds, starts, stops, or displays the status of a particular physical drive. The parameter
pd
is the
physical drive ID.
megaraid -showadapter [-log
file
]
Displays information about the adapter, including product identification, battery status, number of
logical drives created, cache size, and more.
megaraid -showconfig [ld] [-log
file
]
Displays the RAID configuration of the computer, including logical drive ID, RAID level, size, status,
and participating physical drives. The logical drive status can be
failed, degraded, or optimal.
You cannot access a failed logical drive or recover data from it. You can access all data on a degraded
logical drive (without a failure) even if all the attached physical drives are not in good condition.
A degraded logical drive state does not apply to RAID 0, because RAID 0 is not a redundant array.
A logical drive reported to be in the optimal state is in perfect condition.
megaraid -showdevices [-log
file
]
Displays all drives connected to the PCI RAID Card. The command displays drive ID, identification, size,
status, and any SMART alerts. The status of a drive is reported as
online, failed, ready, hotspare,
or
not responding.
megaraid -spare
pd
-create | -delete [-log
file
]
Creates or deletes a global hot spare. You can create hot spares from a pool of ready drives.
After deletion, a hot spare drive becomes a ready drive. The parameter
pd
is the physical drive ID.