prtvtoc - report information about a disk geometry and partitioning
prtvtoc [-fhs] [-t vfstab] [-m mnttab] device
The prtvtoc command allows the contents of the disk label to be viewed.
The device name can be the file name of a raw device in the form of /dev/rdsk/c?t?d?s2 or can be the file name of a block device in the form of /dev/dsk/c?t?d?s2. The command must be run by a user with read access to the given device file, which is normally limited to the root user.
The following options are supported:
Report on the disk free space, including the starting block address of the free space, number of blocks, and unused partitions.
Omit the headers from the normal output.
Use mnttab as the list of mounted filesystems, in place of /etc/mnttab.
Omit all headers but the column header from the normal output.
Use vfstab as the list of filesystem defaults, in place of /etc/vfstab.
The following example uses the prtvtoc command on a 558.91-gigabyte hard disk:
example# prtvtoc /dev/rdsk/c0t5000CCA0438594D4d0s2 * /dev/rdsk/c0t5000CCA0438594D4d0s2 partition map * * Dimensions: * 512 bytes/sector * 668 sectors/track * 27 tracks/cylinder * 18036 sectors/cylinder * 64988 cylinders * 64986 accessible cylinders * * Label: * SMI/VTOC * * Flags: * 1: unmountable * 10: read-only * * First Sector Last * Partition Tag Flags Sector Count Sector Mount Directory 0 2 00 0 270540 270539 1 3 01 270540 270540 541079 2 5 01 0 1172087496 1172087495 6 4 00 541080 1171546416 1172087495 example#
The data in the Tag column above indicates the type of partition, as follows:
The data in the Flags column above indicates how the partition is to be mounted, as follows:
The following example uses the prtvtoc command with the –f option on a 558.91-gigabyte hard disk:
example# prtvtoc –f /dev/rdsk/c0t5000CCA056443D34d0 FREE_START=34 FREE_SIZE=222 FREE_COUNT=1 FREE_PART=134567Example 3 Using the prtvtoc Command on a Disk Over One Terabyte
The following example uses uses the prtvtoc command on a disk over one terabyte:.
example# prtvtoc /dev/rdsk/c0t600144F00010E0352FB45F06DC2A0001d0 * /dev/rdsk/c0t600144F00010E0352FB45F06DC2A0001d0 partition map * * Dimensions: * 512 bytes/sector * 3221225472 sectors * 3221225405 accessible sectors * * Label: * EFI/GPT * * Flags: * 1: unmountable * 10: read-only * * Unallocated space: * First Sector Last * Sector Count Sector * 34 14 47 * 3221209040 15 3221209054 * * First Sector Last * Partition Tag Flags Sector Count Sector Mount Directory 0 4 00 48 3221208992 3221209039 8 11 00 3221209055 16384 3221225438
See attributes(7) for descriptions of the following attributes:
The mount command does not check the “not mountable” bit.