# lsscsi 
[0:0:0:0]    disk    ATA      INTEL SSDSC2BW18 DC32  /dev/sda 
[1:0:0:0]    disk    ATA      INTEL SSDSC2BW18 DC32  /dev/sdb 
[2:0:0:0]    disk    ATA      WDC WD5000HHTZ-0 6A00  /dev/sdc 
[3:0:0:0]    disk    ATA      WDC WD5000HHTZ-0 6A00  /dev/sdd 
[4:0:0:0]    disk    ATA      WDC WD5000HHTZ-0 6A00  /dev/sde 
[5:0:0:0]    disk    ATA      WDC WD5000HHTZ-0 6A00  /dev/sdf 
[6:0:0:0]    disk    LIO-ORG  IBLOCK           4.0   /dev/sdg 
[6:0:0:1]    disk    LIO-ORG  IBLOCK           4.0   /dev/sdh 
[6:0:0:2]    disk    LIO-ORG  IBLOCK           4.0   /dev/sdi 
[6:0:0:3]    disk    LIO-ORG  IBLOCK           4.0   /dev/sdj 

# btrfs fi show /local00
Label: 'local00'  uuid: 50b301be-9fb3-4815-9640-816ba8d00863
        Total devices 2 FS bytes used 1.57TiB
        devid    1 size 2.05TiB used 1.58TiB path /dev/sdi2
        devid    2 size 2.05TiB used 1.58TiB path /dev/sdj2

Btrfs v3.16.2+20141003

# btrfs fi show /local01
Label: 'local01'  uuid: 03d93a95-265f-4064-83b7-60cbf6fa0911
        Total devices 4 FS bytes used 560.23GiB
        devid    1 size 698.63GiB used 564.53GiB path /dev/sdg1
        devid    2 size 699.00GiB used 564.53GiB path /dev/sdi1
        devid    3 size 698.64GiB used 564.53GiB path /dev/sdh1
        devid    4 size 699.00GiB used 564.53GiB path /dev/sdj1

Btrfs v3.16.2+20141003

# btrfs fi show /data00
Label: 'data'  uuid: 7db152a0-e63b-40a4-bc3b-f39b5e240f3a
        Total devices 4 FS bytes used 23.25GiB
        devid    1 size 380.00GiB used 165.03GiB path /dev/sdc3
        devid    2 size 380.00GiB used 165.03GiB path /dev/sdd3
        devid    3 size 380.00GiB used 165.03GiB path /dev/sde3
        devid    4 size 380.00GiB used 165.03GiB path /dev/sdf3

Btrfs v3.16.2+20141003