megaraid(8) BSD System Manager's Manual megaraid(8)
NAME
megaraid -- Command Line Utility for MegaRAID management.
SYNOPSIS
megaraid -showadapter
megaraid -showdevices
megaraid -showconfig [ld]
megaraid -destroyconfig [-yes]
megaraid -create R0 | R1 | R5 -drive { 0 1 2 3} [-stripesize n] [-size x]
[-writecache enable | disable] [-readahead on | off | adaptive]
[-iopolicy direct | cached]
megaraid -create auto [-numld n]
megaraid -changepolicy ld [-writecache enable | disable]
[-readahead on | off | adaptive] [-iopolicy direct | cached]
megaraid -rebuild pd -start | -stop | -status
megaraid -chkcon ld -start | -stop | -status
megaraid -initialize ld -start | -stop | -status
megaraid -spare pd -create | -delete
megaraid -changestate pd -online | -fail
megaraid -alarm -on | -off | -silence
megaraid -flash flashFileName
DESCRIPTION
megaraid is a command line RAID management tool. This tool can create
logical drive using multiple/single physical drives. Also, it has the
capability to manage these logical/ physical drives and provides options
to monitor and trigger any action on these logical/physical drives.
If -log option is given, then all the displayed information will be
logged with Date and Time in a file specified by -log option. This option
will apply to all commands/operations.
COMMAND DETAILS
megaraid -showadapter [-log file]
Displays all relevant information about the adapter including product
identification, battery status, number of logical drives created, cache
size etc.
megaraid -showdevices [-log file]
Displays all drives connected to the MegaRAID adapter. This will display
Drive Id, Identification, size, status and any SMART alerts. The status
of a drive can be Online, Failed, Ready, Hotspare, and Not Responding.
megaraid -showconfig [ld] [-log file]
Shows the RAID configuration in the system with Logical Drive Id, RAID
Level, Size, Status, and participating physical drives. The logical drive
status can be Failed, Degraded, or Optimal. A failed logical drive cannot
be accessed and no data can be recovered from it. A degraded logical
drive enables the user to access all data without a failure even though
all attached physical drives are not in good condition. A degraded logi-
cal drive does not apply to RAID0 because RAID0 is not a redundant array.
Optimal state means that the logical drive is in perfect condition.
megaraid -destroyconfig [-yes] [-log file]
Clears the configuration. If the user does not specify "yes" the system
will prompt for reconfirmation.
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]
megaraid -create auto [-numld n] [-log file]
Creates a logical drive and adds it to the existing configuration. The
RAID level and participating physical drives are mandatory parameters.
All other parameters are optional. If size is not specified, then the
remaining size of the array will automatically be used. If stripe size
and cache policy are not specified then the default values will automati-
cally be used. The stripe size parameter is in Kilobytes and valid stripe
sizes are 16, 32, 64 and 128 KiloBytes. The size parameter is in MB and
the minimum size of a logical drive must be 100MB. A logical drive cannot
be created with a capacity less than 100MB. Once a logical drive is cre-
ated, the cache policy can be changed using the changepolicy command.
Auto Create will automatically destroy all current configuared logical
drives and create RAID Level depending on physical drive present. It can
create n ( 1 to 40) logical drive(s) depending on numld parameter. By
default numld is 1.
Default values are as follows:
stripesize 64K
writecache enabled
readcache off
cached io
megaraid -changepolicy ld [-writecache enable | disable] [-readahead on |
off | adaptive] [-iopolicy direct | cached] [-log file]
Changes the policy of an existing logical drive. The parameter id must be
the logical drive id. This option will apply to all RAID levels; however,
the policies will only apply to individual logical drives.
megaraid -spare pd -create | -delete [-log file]
Creates or deletes a global hotspare. Hotspares can be created from ready
pool devices. After deletion, a hotspare drive will be a ready drive. The
parameter pd is the physical drive id.
megaraid -rebuild pd -start | -stop | -status [-log file]
Rebuilds, starts, stops or gives the status of a particular physical
drive. The parameter pd is the physical drive id.
megaraid -chkcon ld -start | -stop | -status [-log file]
Starts, stops, or checks the status (percentage of progress) of a check
consistency with a particular logical drive. The parameter id is the
logical drive id.
megaraid -flash flashFileName [-log file]
Flashes new firmware from the "flashfile" to the adapter. The new
firmware will be operational only after system reboot.
megaraid -initialize ld -start | -stop | -status [-log file]
Initializes, starts, stops, or gives the status (percentage of progress)
of a particular logical drive. The parameter ld is the logical drive id.
megaraid -changestate pd -online | -fail [-log file]
Changes the state of a physical drive from online to failed. The parame-
ter pd is the physical drive id.
megaraid -alarm -on | -off | -silence
Turn Alarm on, off or silence. When alarm set to silence, it will turn
off for current failure but it will turn on for next failure.
EXAMPLES
Creating RAID0 Logical Drive with a stripe size of 128K and a drive size
of 1 GB = 1024 MB
megaraid -create R0 -drive 0 1 2 -stripesize 128 -size 1024
Creating RAID1 Logical Drive with a stripe size of 64K and a drive size
of full capacity
megaraid -create R1 -drive 0 1 -stripesize 64
Creating RAID5 Logical Drive with a stripe size of 64K and a drive size
of full capacity, the cache policy is Read Ahead, WriteCached enabled,
and CachedIO
megaraid -create R1 -drive 0 1 -stripesize 64 -writecache enable
-readahead on -iopolicy cached
Creating automatically 5 logcial drives
megaraid -create auto -numld 5
Run Check Consistency on logical drive 5 RAID 5
megaraid -chkcon 5 -start
Mac OS X 22 Mar 2004 Mac OS X
Mac OS X 10.5 - Generated Sun Oct 28 21:47:00 EDT 2007