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| System Administration Commands | prtvtoc(1M) |
| | prtvtoc - report information about a disk geometry and partitioning |
SYNOPSIS
| | prtvtoc [-fhs] [-t vfstab] [-m mnttab] device |
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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.
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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.
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| | Example 1. The prtvtoc command.
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The command line entry and system response shown below are for a 424-megabyte hard disk:
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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
*
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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 |
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 |
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Example 2. Output for the f option.
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The following example shows output for the -f option for the same disk as above.
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example# prtvtoc -f /dev/rdsk/c0t3d0s2
FREE_START=0 FREE_SIZE=0 FREE_COUNT=0 FREE_PART=34
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See attributes(5) for descriptions of the following
attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Availability | SUNWcsu |
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The mount command does not check the "not mountable" bit.
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