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mkfs(1m)

System Administration Commands                                        mkfs(1M)



NAME
       mkfs - construct a file system

SYNOPSIS
       mkfs [-F FSType] [generic_options]
            [-o FSType-specific_options] raw_device_file
            [operands]


DESCRIPTION
       The  mkfs  utility  constructs  a file system on the raw_device_file by
       calling the specific mkfs module indicated by  -F FSType.


       Note: ufs file systems are normally created with the newfs(1M) command.


       generic_options  are  independent  of  file  system  type.  FSType-spe‐
       cific_options  is a comma-separated  list of  keyword=value pairs (with
       no intervening  spaces),  which  are  FSType-specific.  raw_device_file
       specifies  the  disk partition on which to write the file system. It is
       required  and   must  be  the  first  argument  following   the    spe‐
       cific_options  (if any). operands are  FSType-specific. See the FSType-
       specific manual page  of   mkfs  (for  example,   mkfs_ufs(1M))  for  a
       detailed description.

OPTIONS
       The following are the generic options for mkfs:

       -F    Specify  the   FSType to be constructed. If  -F is not specified,
             the  FSType is  determined  from   /etc/vfstab  by  matching  the
             raw_device_file  with  a   vfstab  entry,  or  by  consulting the
             /etc/default/fs file.


       -V    Echo the complete command line, but do not execute  the  command.
             The  command line is generated by using the options and arguments
             provided and adding to them information derived from  /etc/vfstab
             or   /etc/default/fs. This option may be used to verify and vali‐
             date the command line.


       -m    Return the command line which was used to create the file system.
             The  file system must already exist. This option provides a means
             of determining the command used in constructing the file system.


       -o    Specify  FSType-specific options. See the  manual  page  for  the
             mkfs module specific to the file system type.


USAGE
       See  largefile(5)  for  the  description  of  the behavior of mkfs when
       encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).

FILES
       /etc/default/fs    Default file system type. Default values can be  set
                          for  the  following  flags  in  /etc/default/fs. For
                          example: LOCAL=ufs

                          LOCAL    The default partition for a command  if  no
                                   FSType is specified.



       /etc/vfstab        List of default parameters for each file system


ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:




       tab()   box;   cw(2.75i)  |cw(2.75i)  lw(2.75i)  |lw(2.75i)  ATTRIBUTE
       TYPEATTRIBUTE VALUE _ Availabilitysystem/core-os


SEE ALSO
       mkfs_ufs(1M), newfs(1M), vfstab(4), attributes(5), largefile(5)


       Manual pages for the  FSType-specific modules of  mkfs.

NOTES
       This command might not be supported for all FSTypes.


       You can use lofiadm to create a file that appears to a mkfs command  as
       a  raw  device. You can then use a mkfs command to create a file system
       on that device. See lofiadm(1M) for examples of creating a UFS and a PC
       (FAT)  file  system  (using mkfs_ufs(1M) and mkfs_pcfs(1M)) on a device
       created by lofiadm.



SunOS 5.11                        17 Nov 2000                         mkfs(1M)
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