prtvtoc(1M)
NAME
prtvtoc − report information about a disk geometry and partitioning
SYNOPSIS
prtvtoc [ −fhs ] [ −t vfstab ] [ −m mnttab ] device
AVAILABILITY
SUNWcsu
DESCRIPTION
The prtvtoc command allows the contents of the VTOC (volume table of contents) to be viewed. The command can be used only by the super-user.
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.
OPTIONS
The following options are supported:
−f Report on the disk free space, including the starting block address of the free space, number of blocks, and unused partitions.
−h Omit the headers from the normal output.
−s Omit all headers but the column header from the normal output.
−t vfstab Use vfstab as the list of filesystem defaults, in place of /etc/vfstab.
−m mnttab Use mnttab as the list of mounted filesystems, in place of /etc/mnttab.
EXAMPLES
The command line entry and system response shown below are for a 424-megabyte hard disk:
example# prtvtoc /dev/rdsk/c0t3d0s2
∗ /dev/rdsk/c0t3d0s2 partition map
∗
∗ Dimension:
∗ 512 bytes/sector
∗ 80 sectors/track
∗ 9 tracks/cylinder
∗ 720 sectors/cylinder
∗ 2500 cylinders
∗ 1151 accessible cylinders
∗
∗ Flags:
∗ 1: unmountable
∗ 10: read-only
∗
| ∗ | First | Sector | Last | |||
| ∗ Partition | Tag | Flags | Sector | Count | Sector | Mount Directory |
| 0 | 2 | 00 | 0 | 76320 | 76319 | / |
| 1 | 3 | 01 | 76320 | 132480 | 208799 | |
| 2 | 5 | 00 | 0 | 828720 | 828719 | |
| 5 | 6 | 00 | 208800 | 131760 | 340559 | /opt |
| 6 | 4 | 00 | 340560 | 447120 | 787679 | /usr |
| 7 | 8 | 00 | 787680 | 41040 | 828719 | /export/home |
example# Codes for TAG are:
| NAME | NUMBER |
| UNASSIGNED | 0 |
| BOOT | 1 |
| ROOT | 2 |
| SWAP | 3 |
| USR | 4 |
| BACKUP | 5 |
| VAR | 7 |
| HOME | 8 |
FLAG indicates how the partition is to be mounted.
| NAME | NUMBER |
| MOUNTABLE, READ AND WRITE | 00 |
| NOT MOUNTABLE | 01 |
| MOUNTABLE, READ ONLY | 10 |
The following example shows output for the −f option for the same disk as above.
example# prtvtoc −f /dev/rdsk/c0t3d0s0
FREE_START=0 FREE_SIZE=0 FREE_COUNT=0 FREE_PART=4
example#
SEE ALSO
devinfo(1M), fmthard(1M), format(1M)
WARNINGS
The mount command does not check the "not mountable" bit.
SunOS 5.5/SPARC — Last change: 25 Aug 1995