NAME

metaoffline, metaonline − offline and on-line submirrors

SYNOPSIS

/usr/etc/metaoffline [ -h ] [ submirror ]

/usr/etc/metaonline [ -h ] [ submirror ]

AVAILABILITY

These programs are available with the Sun Online: DiskSuite software package. 

DESCRIPTION

metaoffline prevents the metadisk driver from reading from and writing to the offlined submirror.  While the submirror is offlined, the writes to the metamirror will be kept track of (by region) and will be written when the submirror is brought back on-line.  metaoffline differs from metadetach since it does not sever the logical association between the submirror and the metamirror.  To completely remove a submirror away from a metamirror, metadetach must be used. 

When metaonline is used, reading from and writing to the submirror resumes.  A optimized resync is automatically invoked to resync the regions written while the submirror was offline.  Writes are directed to the submirror during resync.  Reads, however, will come from a different submirror.  Once the resync operation completes, reads and writes are performed on that submirror.  This command is only effective on an offlined submirror of a metamirror. 

OPTIONS

−h Displays usage message. 

SEE ALSO

md(4s), md.conf(5), mddb.conf(5), metatab(5), metaclear(8), metad(8), metadb(8), metahs(8), metainit(8), metaparam(8), metareplace(8), metastat(8), metasync(8), metattach(8)

Sun Online: DiskSuite Administration Guide
System and Network Administration

Sun Release 4.1  —  Last change: 23 July 1991