metareplace(1M) System Administration Commands metareplace(1M)NAMEmetareplace - enable or replace components of submirrors or RAID5
metadevices
SYNOPSIS
/usr/sbin/metareplace -h
/usr/sbin/metareplace [-s setname] -e mirror component
/usr/sbin/metareplace [-s setname] mirror component-old component-new
/usr/sbin/metareplace [-s setname] -e RAID component
/usr/sbin/metareplace [-s setname] [-f] RAID component-old component-new
DESCRIPTION
The metareplace command is used to enable or replace components
(slices) within a submirror or a RAID5 metadevice.
When you replace a component, the metareplace command automatically
starts resyncing the new component with the rest of the metadevice.
When the resync completes, the replaced component becomes readable and
writable. If the failed component has been hot spare replaced, the hot
spare is placed in the available state and made available for other hot
spare replacements.
Note that the new component must be large enough to replace the old
component.
A component may be in one of several states. The Last Erred and the
Maintenance states require action. Always replace components in the
Maintenance state first, followed by a resync and validation of data.
After components requiring maintenance are fixed, validated, and
resynced, components in the Last Erred state should be replaced. To
avoid data loss, it is always best to back up all data before replacing
Last Erred devices.
OPTIONS
Root privileges are required for all of the following options except
-h.
-e Transitions the state of component to the available
state and resyncs the failed component. If the failed
component has been hot spare replaced, the hot spare
is placed in the available state and made available
for other hot spare replacements. This command is use‐
ful when a component fails due to human error (for
example, accidentally turning off a disk), or because
the component was physically replaced. In this case,
the replacement component must be partitioned to match
the disk being replaced before running the metareplace
command.
-f Forces the replacement of an errored component of a
metadevice in which multiple components are in error.
The component determined by the metastat display to be
in the ``Maintenance'' state must be replaced first.
This option may cause data to be fabricated since mul‐
tiple components are in error.
-h Display help message.
-s setname Specifies the name of the diskset on which metareplace
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.
mirror The metadevice name of the mirror.
component The logical name for the physical slice (partition) on
a disk drive, such as /dev/dsk/c0t0d0s2.
component-old The physical slice that is being replaced.
component-new The physical slice that is replacing component-old.
RAID The metadevice name of the RAID5 device.
EXAMPLES
Example 1 Recovering from Error Condition in RAID5 Metadevice
This example shows how to recover when a single component in a RAID5
metadevice is errored.
# metareplace d10 c3t0d0s2 c5t0d0s2
In this example, a RAID5 metadevice d10 has an errored component,
c3t0d0s2, replaced by a new component, c5t0d0s2.
Example 2 Use of -e After Physical Disk Replacement
This example shows the use of the -e option after a physical disk in a
submirror (a submirror of mirror mymirror1, in this case) has been
replaced.
# metareplace-e mymirror1 c1t4d0s2
Note: The replacement disk must be partitioned to match the disk it is
replacing before running the metareplace command.
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 │storage/svm │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmdmonitord(1M), metaclear(1M), metadb(1M), metadetach(1M), metahs(1M),
metainit(1M), metaoffline(1M), metaonline(1M), metaparam(1M), metare‐
cover(1M), metarename(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)SunOS 5.11 26 Mar 2006 metareplace(1M)
