PRTVTOC(1M) Maintenance Commands PRTVTOC(1M)

prtvtoc - report information about a disk geometry and partitioning

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

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.

The following options are supported:

-e

Include extended partition table information if available.

-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.

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

devinfo(1M), fmthard(1M), format(1M), mount(1M), attributes(5)

The mount command does not check the "not mountable" bit.
April 14, 2020 OmniOS