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System Administration Commands metaparam(1M)
NAME
metaparam - modify parameters of metadevices
SYNOPSIS
/usr/sbin/metaparam -h
/usr/sbin/metaparam [-s setname] [ concat/stripe or RAID5
options] concat/stripe RAID
/usr/sbin/metaparam [-s setname] [ mirror options] 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 options.
The following options are supported:
-h Displays usage message.
-s setname Specify the name of the diskset on which
metaparam works. Using the -s option causes
the command to perform its administrative
function within the specified diskset.
Without this option, the command performs
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 meta-
device 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 con-
currently. 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 meta-
device name of the
mirror.
EXAMPLES
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
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
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWmdu |
|_____________________________|_____________________________|
SEE ALSO
mdmonitord(1M), metaclear(1M), metadb(1M), metadetach(1M),
metahs(1M), metainit(1M), metaoffline(1M), metaonline(1M),
metarecover(1M), metarename(1M), metareplace(1M),
metaroot(1M), metaset(1M), metassist(1M), metastat(1M),
metasync(1M), metattach(1M), md.tab(4), md.cf(4),
mddb.cf(4), md.tab(4), attributes(5), md(7D)
Solaris Volume Manager Administration Guide
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