metaparam(1M)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | CONCAT/STRIPE OR RAID5 OPTIONS | MIRROR OPTIONS | EXAMPLES | EXIT STATUS | ATTRIBUTES | SEE ALSO

NAME

metaparam– modify parameters of metadevices

SYNOPSIS

/usr/sbin/metaparam -h
/usr/sbin/metaparam [-s setname] [concat/stripeorRAID5options] concat/stripe RAID
/usr/sbin/metaparam [-s setname] [mirroroptions] mirror

DESCRIPTION

The metaparam command is used to display or modify current parameters of metadevices.

If just the metadevice is specified as an argument to the metaparam command, the current settings are displayed.

The metaparam command enables most metadevice (volume) parameters to be changed. Only the interlace value cannot be changed by metaparam, because it is established when the metadevice is created and cannot be changed thereafter.

OPTIONS

Root privileges are required for all of the following options except -h.

-h

Displays usage message.

-s setname

Specifies the name of the diskset on which metaparam will work. Using the -s option will cause the command to perform its administrative function within the specified diskset. Without this option, the command will perform its function on local metadevices.

CONCAT/STRIPE OR RAID5 OPTIONS

–h hot_spare_pool | none

Specifies the hot spare pool to be used by a metadevice. If none is specified, the metadevice is disassociated with the hot spare pool assigned to it. If the metadevice is currently using a hot spare, then metaparam cannot replace the hot spare pool.

concat/stripe | RAID

Specifies the metadevice name of the concatenation, stripe, or concatenation of stripes, or of the RAID5 metadevice.

MIRROR OPTIONS

–r roundrobin | geometric | first

Modifies the read option for a mirror. The -r option must be followed by either roundrobin, geometric, or first. roundrobin, which is the default action under the metainit command, specifies reading the disks in a round-robin (load balancing) method. geometric allows for faster performance on sequential reads. first specifies reading only from the first submirror.

–w parallel | serial

Modifies the write option for a mirror. The -w option must be followed by either parallel or serial. parallel, the default action under the metainit command, specifies that all writes are parallel. serial specifies that all writes are serial.

-p pass_number

A number from 0-to-9 that specifies the order in which a mirror is resynced during reboot. The default is 1. Smaller pass numbers are resynced first. Equal pass numbers are run concurrently. If 0 is used, the mirror resync is skipped. 0 should only be used for mirrors mounted as read-only, or as swap.

mirror

Specifies the metadevice name of the mirror.

EXAMPLES

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Example 1 Associating Hot Spare Pool with RAID5 Metadevice




This example associates a hot spare pool, hsp005, with a RAID5 metadevice, d80.

# metaparam -h hsp005 d80

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Example 2 Changing Read Option to Geometric




This example changes the read option on a mirror d50 from the default of roundrobin to geometric.

# metaparam -r geometric d50

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EXIT STATUS

The following exit values are returned:

0

Successful completion.

>0

An error occurred.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Availability	SUNWmdu

SEE ALSO

metaclear(1M), metadb(1M), metadetach(1M), metahs(1M), metainit(1M), metaoffline(1M), metaonline(1M), metareplace(1M), metaroot(1M), metaset(1M), metastat(1M), metasync(1M), metattach(1M), md.tab(4), md.cf(4), mddb.cf(4)

Solaris Volume Manager Administration Guide

SunOS 5.9  Last Revised 18 Dec 2001

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | CONCAT/STRIPE OR RAID5 OPTIONS | MIRROR OPTIONS | EXAMPLES | EXIT STATUS | ATTRIBUTES | SEE ALSO