신규 어레이를 추가했는데..

포맷하려고 할때...

mkfs.ext4 /dev/sdc1

/dev/sdc1 is apparently in use by the system; will not make a filesystem here!

메세지 출력 후 포맷이 안될 때...

멀티패스 블랙리스트에 추가...

1. 멀티패스 확인

# multipath -l
mpath0 (3600000e00d110000001100eb00000000) dm-1 FUJITSU,ETERNUS_DXL
[size=5.3T][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
 \_ 4:0:0:0 sdc 8:32  [active][undef]
data10 (3600000e00d1100000011010100000000) dm-0 FUJITSU,ETERNUS_DXL
[size=6.0T][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
 \_ 2:0:0:0 sda 8:0   [active][undef]
\_ round-robin 0 [prio=0][enabled]
 \_ 3:0:0:0 sdb 8:16  [active][undef]

2. wwid 확인

  - #scsi_id -g -u -s /block/sdc

    3600000e00d110000001100eb00000000

3. 블랙리스트 wwid 추가

#vi /etc/multipath.conf

blacklist {
       wwid 3600000e00d110000001100eb00000000    <==== 추가할 wwid 
        devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
        devnode "^hd[a-z]"
        devnode "^cciss!c[0-9]d[0-9]*"
}

4. multipath  재시작

#service multipathd restart

5. multipath 확인

#multipath -l

data10 (3600000e00d1100000011010100000000) dm-0 FUJITSU,ETERNUS_DXL
[size=6.0T][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
 \_ 2:0:0:0 sda 8:0   [active][undef]
\_ round-robin 0 [prio=0][enabled]
 \_ 3:0:0:0 sdb 8:16  [active][undef]