PRTVTOC(8) Maintenance Commands and Procedures PRTVTOC(8)

NAME

prtvtoc - report information about a disk geometry and partitioning

SYNOPSIS

prtvtoc [-fhs] [-t vfstab] [-m mnttab] device

DESCRIPTION

The prtvtoc command allows the contents of the label 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.


-m mnttab
Use mnttab as the list of mounted filesystems, in place
of /etc/mnttab.


-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.

EXAMPLES

Example 1: Using the prtvtoc Command

The following example uses the prtvtoc command on a 424-megabyte hard
disk:


example# prtvtoc /dev/rdsk/c0t3d0s2
* /dev/rdsk/c0t3d0s2 partition map
*
* Dimensions:
* 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


The data in the Tag column above indicates the type of partition, as
follows:


Name Number
UNASSIGNED 0x00
BOOT 0x01
ROOT 0x02
SWAP 0x03
USR 0x04
BACKUP 0x05
STAND 0x06
VAR 0x07
HOME 0x08
ALTSCTR 0x09
CACHE 0x0a
RESERVED 0x0b


The data in the Flags column above indicates how the partition is to
be mounted, as follows:


Name Number
MOUNTABLE, READ AND WRITE 0x00
NOT MOUNTABLE 0x01
MOUNTABLE, READ ONLY 0x10

Example 2: Using the prtvtoc Command with the -f Option

The following example uses the prtvtoc command with the -f option on
a 424-megabyte hard disk:


example# prtvtoc -f /dev/rdsk/c0t3d0s2
FREE_START=0 FREE_SIZE=0 FREE_COUNT=0 FREE_PART=34

Example 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/c1t1d0s2
* /dev/rdsk/c1t1d0s2 partition map
*
* Dimensions:
* 512 bytes/sector
* 3187630080 sectors
* 3187630013 accessible sectors
*
* Flags:
* 1: unmountable
* 10: read-only
*
* First Sector Last
* Partition Tag Flags Sector Count Sector Mount Directory
0 2 00 34 262144 262177
1 3 01 262178 262144 524321
6 4 00 524322 3187089340 3187613661
8 11 00 3187613662 16384 318763004

SEE ALSO

attributes(7), devinfo(8), fmthard(8), format(8), mount(8)

WARNINGS

The mount command does not check the "not mountable" bit.

April 14, 2020 PRTVTOC(8)