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2010-09-03 02:28:36

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 

    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(5) for descriptions of the following attributes:

    ATTRIBUTE TYPE 

    ATTRIBUTE VALUE 

    Availability 

    SUNWcsu 

See Also

Warnings

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