• 新しく買ってきた真っ新なHDDをミラーリングプールに追加

 # gmirror status

Name    Status  Components

mirror/8tbhdd0p1  COMPLETE

ad8p1 (ACTIVE)
ad11p1 (ACTIVE)

#  gpart create -s GPT ad12
ad12 created
# gpart add -t freebsd-ufs ad12
ad12p1 added
# gmirror insert 8tbhdd0p1 ad12p1
# gmirror status

Name    Status  Components

mirror/8tbhdd0p1  DEGRADED  ad8p1 (ACTIVE)
ad11p1 (ACTIVE)
ad12p1 (SYNCHRONIZING, 0%)

• 今までのミラーリングプールから１台離脱

# gmirror remove 8tbhdd0p1 ad8p1
# gmirror status
Name    Status  Components
mirror/8tbhdd0p1  DEGRADED  ad11p1 (ACTIVE)
ad12p1 (SYNCHRONIZING, 0%)

• 離脱させたHDDで別のミラーリングプールを作成

# gmirror label -v -b round-robin 8tbhdd1p1 ad8p1
Metadata value stored on ad8p1.
Done.
# gmirror status
Name    Status  Components
mirror/8tbhdd0p1  DEGRADED  ad11p1 (ACTIVE)
ad12p1 (SYNCHRONIZING, 0%)
mirror/8tbhdd1p1  COMPLETE  ad8p1 (ACTIVE)