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man pages section 8: System Administration Commands

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Updated: Wednesday, February 9, 2022
 
 

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 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.

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 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:

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 558.91-gigabyte hard disk:

example# prtvtoc –f /dev/rdsk/c0t5000CCA056443D34d0
FREE_START=34 FREE_SIZE=222 FREE_COUNT=1 FREE_PART=134567
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/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

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.