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6 .TH METAOFFLINE 1M "Mar 26, 2006"
8 metaoffline, metaonline \- place submirrors offline and online
12 \fB/usr/sbin/metaoffline\fR \fB-h\fR
17 \fB/usr/sbin/metaoffline\fR [\fB-s\fR \fIsetname\fR] [\fB-f\fR] \fImirror\fR \fIsubmirror\fR
22 \fB/usr/sbin/metaonline\fR \fB-h\fR
27 \fB/usr/sbin/metaonline\fR [\fB-s\fR \fIsetname\fR] \fImirror\fR \fIsubmirror\fR
33 The \fBmetaoffline\fR command prevents Solaris Volume Manager from reading and
34 writing to the submirror that has been taken offline. While the submirror is
35 offline, all writes to the mirror will be kept track of (by region) and will be
36 written when the submirror is brought back online. The \fBmetaoffline\fR
37 command can also be used to perform online backups: one submirror is taken
38 offline and backed up while the mirror remains accessible. (However, if this is
39 a two-way mirror, data redundancy is lost while one submirror is offline.) The
40 \fBmetaoffline\fR command differs from the \fBmetadetach\fR command because it
41 does not sever the logical association between the submirror and the mirror. To
42 completely remove a submirror from a mirror, use the \fBmetadetach\fR command.
45 A submirror that has been taken offline will only remain offline until the
46 \fBmetaonline\fR command is invoked or the system is rebooted.
49 When the \fBmetaonline\fR command is used, reading from and writing to the
50 submirror resumes. A resync is automatically invoked to resync the regions
51 written while the submirror was offline. Writes are directed to the submirror
52 during resync. Reads, however, will come from a different submirror. Once the
53 resync operation completes, reads and writes are performed on that submirror.
54 The \fBmetaonline\fR command is only effective on a submirror of a mirror that
55 has been taken offline.
58 The \fBmetaoffline\fR and \fBmetaonline\fR commands can not be used on RAID 1
59 volumes in application-based recovery (ABR) mode.
62 A submirror that has been taken offline with the \fBmetaoffline\fR command can
63 only be mounted as read-only.
67 Root privileges are required for all of the following options except \fB-h\fR.
74 Forces offlining of submirrors that have slices requiring maintenance.
83 Displays usage message.
89 \fB\fB-s\fR \fB\fIsetname\fR\fR\fR
92 Specifies the name of the diskset on which \fBmetaoffline\fR and
93 \fBmetaonline\fR will work. Using the \fB-s\fR option will cause the command to
94 perform its administrative function within the specified diskset. Without this
95 option, the command will perform its function on local metadevices.
104 Specifies the metadevice name of the mirror from which the submirror will be
105 either taken offline or put online.
111 \fB\fIsubmirror\fR\fR
114 Specifies the metadevice name of the submirror to be either taken offline or
120 \fBExample 1 \fRTaking a Submirror Offline
123 This example takes one submirror, \fBmymirror_sub1\fR, offline from mirror
129 # metaoffline mymirror mymirror_sub1
137 The following exit values are returned:
144 Successful completion.
159 See \fBattributes\fR(5) for descriptions of the following attributes:
167 ATTRIBUTE TYPE ATTRIBUTE VALUE
169 Interface Stability Stable
175 \fBmdmonitord\fR(1M), \fBmetaclear\fR(1M), \fBmetadb\fR(1M),
176 \fBmetadetach\fR(1M), \fBmetahs\fR(1M), \fBmetainit\fR(1M),
177 \fBmetaparam\fR(1M), \fBmetarecover\fR(1M), \fBmetarename\fR(1M),
178 \fBmetareplace\fR(1M), \fBmetaroot\fR(1M), \fBmetaset\fR(1M),
179 \fBmetassist\fR(1M), \fBmetastat\fR(1M), \fBmetasync\fR(1M),
180 \fBmetattach\fR(1M), \fBmd.tab\fR(4), \fBmd.cf\fR(4), \fBmddb.cf\fR(4),
181 \fBmd.tab\fR(4), \fBattributes\fR(5), \fBmd\fR(7D)
188 The \fBmetaonline\fR and \fBmetaoffline\fR commands are not applicable to
189 mirrors in application-based recovery (ABR) mode.