MKXFS

Section: Maintenance Commands (8)
Updated: 20 February 1993
Index Return to Main Contents
 

NAME

mkxfs - make a xiafs file system  

SYNOPSIS

mkxfs [-c | -l file] [-k blocks] [-z blocks] device blocks  

DESCRIPTION

The command mkxfs makes a xiafs file system on a low level formatted block device device. The numeric argument blocks specifies the number of blocks in the file system. In this context, a block is a 1024-byte piece of disk storage, usually occupying 2 physical disk sectors. Blocks are grouped into zones. A zone is the smallest amount of device space that can be allocated to a file. The default zone size is 1024 bytes, i.e., a single block. mkxfs builds a xiafs file system with a root directory. i-node 2 is reserved for bad blocks. The number of inodes is calculated as a function of the file system size. Currently one i-node is allocated for every four zones.

This command can only be used by the super-user.

 

OPTIONS

mkxfs has the following options:
-c
mkxfs checks bad blocks and links them to i-node 2. a file badblocks.log is created in the current directory by mkxfs for recording.
-l file
mkxfs reads bad block numbers from the file file and links them to i-node 2. file is an ASCII file and each line contains a single bad block number.
-k blocks
reserves blocks block for kernel image. This reserved space could be used by a simple booter. However, the reserved space is not initialized by mkxfs. Mkboot(8) may be used to install a kernel image in the reserved space.
-z blocks
This option specifies the zone size. The default is one block (1024 bytes). The numeric argument blocks may be 2 or 4. Currently only the default value is supported by the kernel.

 

EXAMPLE

# mkxfs /dev/fd0 1440           % make a xiafs file system
# mkxfs -c /dev/hda3 150000     % check bad blocks and make 
                                % a xiafs file system on hda3
# mkxfs -k 512 /dev/hda1 20000  % make a xiafs file system
                                % with 512 KB reserved.
 

AUTHOR

Q. Frank Xia (qx@math.columbia.edu)  

SEE ALSO

mkboot(8), xfsck(8).  

BUGS

Currently, the Linux kernel only supports xiafs with one-block zone size. The ratio of blocks-per-inode (currently 4) should be selectable through a commandline argument.

 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLE
AUTHOR
SEE ALSO
BUGS
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