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man pages section 8: System Administration Commands

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Updated: Thursday, June 13, 2019
 
 

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
*
* 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#

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
SYSTEM
0x0c
BOOT
0x18

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

Attributes

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Availability
system/core-os

See Also

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

Warnings

The mount command does not check the “not mountable” bit.