root@ns316384:~# parted -l
Model: ATA HGST HUS724040AL (scsi)
Disk /dev/sda: 4001GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system  Name     Flags
 1      20.5kB  1049kB  1029kB               primary  bios_grub
 2      2097kB  21.0GB  21.0GB  ext4         primary  raid
 3      21.0GB  3960GB  3939GB               primary


Model: ATA HGST HUS724040AL (scsi)
Disk /dev/sdb: 4001GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system     Name     Flags
 1      20.5kB  1049kB  1029kB                  primary  bios_grub
 2      2097kB  21.0GB  21.0GB  ext4            primary  raid
 3      21.0GB  4000GB  3979GB  ext4            primary  raid
 4      4000GB  4001GB  536MB   linux-swap(v1)  primary


Model: ATA HGST HUS724040AL (scsi)
Disk /dev/sdc: 4001GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system     Name     Flags
 1      20.5kB  1049kB  1029kB                  primary  bios_grub
 2      2097kB  21.0GB  21.0GB  ext4            primary  raid
 3      21.0GB  4000GB  3979GB  ext4            primary  raid
 4      4000GB  4001GB  536MB   linux-swap(v1)  primary


Model: ATA HGST HUS724040AL (scsi)
Disk /dev/sdd: 4001GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system     Name     Flags
 1      20.5kB  1049kB  1029kB                  primary  bios_grub
 2      2097kB  21.0GB  21.0GB  ext4            primary  raid
 3      21.0GB  4000GB  3979GB  ext4            primary  raid
 4      4000GB  4001GB  536MB   linux-swap(v1)  primary


Model: ATA HGST HUS724040AL (scsi)
Disk /dev/sde: 4001GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system     Name     Flags
 1      20.5kB  1049kB  1029kB                  primary  bios_grub
 2      2097kB  21.0GB  21.0GB  ext4            primary  raid
 3      21.0GB  4000GB  3979GB  ext4            primary  raid
 4      4000GB  4001GB  536MB   linux-swap(v1)  primary


Model: ATA HGST HUS724040AL (scsi)
Disk /dev/sdf: 4001GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system     Name     Flags
 1      20.5kB  1049kB  1029kB                  primary  bios_grub
 2      2097kB  21.0GB  21.0GB  ext4            primary  raid
 3      21.0GB  4000GB  3979GB  ext4            primary  raid
 4      4000GB  4001GB  536MB   linux-swap(v1)  primary


Model: Linux Software RAID Array (md)
Disk /dev/md2: 21.0GB
Sector size (logical/physical): 512B/512B
Partition Table: loop

Number  Start  End     Size    File system  Flags
 1      0.00B  21.0GB  21.0GB  ext4


Model: Linux Software RAID Array (md)
Disk /dev/md3: 3979GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start  End  Size  Type  File system  Flags