metaparam(1M) System Administration Commands metaparam(1M)NAMEmetaparam - modify parameters of metadevices
SYNOPSIS
/usr/sbin/metaparam -h
/usr/sbin/metaparam [-s setname] [ concat/stripe or RAID5 options] con‐
cat/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 per‐
form 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 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 com‐
mand, specifies that all writes
are parallel. serial specifies
that all writes are serial.
-p pass_number A number from 0-to-9 that spec‐
ifies the order in which a mir‐
ror 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 metadevice 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 metade‐
vice, 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 attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWmdu │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmdmonitord(1M), metaclear(1M), metadb(1M), metadetach(1M), metahs(1M),
metainit(1M), metaoffline(1M), metaonline(1M), metarecover(1M), metare‐
name(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
SunOS 5.10 2 Jun 1004 metaparam(1M)
