root@nas[/mnt/big]# diskinfo -v /dev/ada0
/dev/ada0
        512             # sectorsize
        4000787030016   # mediasize in bytes (3.6T)
        7814037168      # mediasize in sectors
        4096            # stripesize
        0               # stripeoffset
        7752021         # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        ST4000DM004-2CV104      # Disk descr.
        WFN17H1A        # Disk ident.
        No              # TRIM/UNMAP support
        5425            # Rotation rate in RPM
        Not_Zoned       # Zone Mode

root@nas[/mnt/big]# diskinfo -v /dev/ada0p1
/dev/ada0p1
        512             # sectorsize
        2147483648      # mediasize in bytes (2.0G)
        4194304         # mediasize in sectors
        4096            # stripesize
        0               # stripeoffset
        4161            # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        ST4000DM004-2CV104      # Disk descr.
        WFN17H1A        # Disk ident.
        No              # TRIM/UNMAP support
        5425            # Rotation rate in RPM

root@nas[/mnt/big]# diskinfo -v /dev/ada0p2
/dev/ada0p2
        512             # sectorsize
        3998639460352   # mediasize in bytes (3.6T)
        7809842696      # mediasize in sectors
        4096            # stripesize
        0               # stripeoffset
        7747859         # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        ST4000DM004-2CV104      # Disk descr.
        WFN17H1A        # Disk ident.
        No              # TRIM/UNMAP support
        5425            # Rotation rate in RPM