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16 <title>MKEXFAT
</title>
21 <h1 align=
"center">MKEXFAT
</h1>
23 <a href=
"#NAME">NAME
</a><br>
24 <a href=
"#SYNOPSIS">SYNOPSIS
</a><br>
25 <a href=
"#DESCRIPTION">DESCRIPTION
</a><br>
26 <a href=
"#OPTIONS">OPTIONS
</a><br>
27 <a href=
"#BUGS">BUGS
</a><br>
28 <a href=
"#AUTHORS">AUTHORS
</a><br>
29 <a href=
"#AVAILABILITY">AVAILABILITY
</a><br>
30 <a href=
"#SEE ALSO">SEE ALSO
</a><br>
40 <p style=
"margin-left:11%; margin-top: 1em">mkexfat
−
41 create an exFAT file system
</p>
44 <a name=
"SYNOPSIS"></a>
48 <p style=
"margin-left:11%; margin-top: 1em"><b>mkexfat
</b>
49 [
<i>options
</i>]
<i>device
</i></p>
52 <a name=
"DESCRIPTION"></a>
57 <p style=
"margin-left:11%; margin-top: 1em"><i><b>mkexfat
</b></i>
58 is used to create an exFAT file system on a device (usually
59 a disk or flash partition) or image.
<i>device
</i> is the
60 special file corresponding to the device (e.g.
<i>/dev/sdXX,
61 /dev/block/mmcblk1p1
</i>) or an image file.
</p>
64 <a name=
"OPTIONS"></a>
68 <p style=
"margin-left:11%; margin-top: 1em">Below is a
69 summary of all the options that
<b>mkexfat
</b> accepts.
70 Nearly all options have two equivalent names. The short name
71 is preceded by
<b>−</b> and the long name is preceded
72 by
<b>−−</b>.
<b><br>
73 −a
</b>,
<b>−−alignment
</b> ALIGNMENT
</p>
75 <p style=
"margin-left:22%;">The alignment of the different
76 exFAT regions, specified in bytes. For instance if a certain
77 type of flash memory might perform best if the internal
78 structures are aligned to
4 MiB boundaries, alignment should
79 be specified as
4194304.
</p>
81 <p style=
"margin-left:11%;"><b>−c
</b>,
82 <b>−−cluster
−size
</b> SIZE
</p>
84 <p style=
"margin-left:22%;">Set the cluster size (in bytes)
85 of the volume to
<b>SIZE
</b>. The default is to determine
86 optimal cluster size automatically.
</p>
88 <p style=
"margin-left:11%;"><b>−f
</b>,
89 <b>−−force
</b></p>
91 <p style=
"margin-left:22%;">Allow formatting an exFAT
92 volume for which the physical sector size cannot be
93 automatically detected (for example an image file).
</p>
95 <p style=
"margin-left:11%;"><b>−g
</b>,
96 <b>−−guid
</b> GUID
</p>
98 <p style=
"margin-left:22%;">Set the volume GUID of the
99 volume to
<b>GUID
</b> (the default is to not set any volume
102 <p style=
"margin-left:11%;"><b>−l
</b>,
103 <b>−−volume
−label
</b> STRING
</p>
105 <p style=
"margin-left:22%;">Set the volume label for the
106 filesystem. The volume label can be up to
11 UTF
−16
107 units long, i.e. in most cases
11 characters.
</p>
109 <p style=
"margin-left:11%;"><b>−s
</b>,
110 <b>−−sector
−size
</b> SIZE
</p>
112 <p style=
"margin-left:22%;">Set the volume sector size (in
113 bytes) to
<b>SIZE
</b>. The default is to detect sector size
114 automatically. Note: This option should probably never be
115 used when formatting devices directly as most exFAT drivers
116 won
’t be able to use an exFAT volume where the volume
117 sector size doesn
’t match the physical sector size
118 (though exFAT/U can in fact do this).
</p>
120 <p style=
"margin-left:11%;"><b>−v
</b>,
121 <b>−−verbose
</b></p>
123 <p style=
"margin-left:22%;">Makes
<b>mkexfat
</b> emit
124 certain status messages related to the formatting
128 <p style=
"margin-left:11%;"><b>−−sda
−strict
</b></p>
130 <p style=
"margin-left:22%;">Forces the formatted volume to
131 adhere to SD Association recommendations.
</p>
134 <p style=
"margin-left:11%;"><b>−−sda
−whole
</b></p>
136 <p style=
"margin-left:22%;">Performs a whole device
137 formatting, including partition table, according to the SD
138 Association recommendations. This option should only be used
139 with whole devices (e.g.
<i>/dev/mmcblk0
</i>) and never
140 partitions (e.g.
<i>/dev/mmcblk0p1
</i>).
</p>
143 <p style=
"margin-left:11%;"><b>−−sda
−relax
</b></p>
145 <p style=
"margin-left:22%;">Relaxes sanity checks for
146 <b>−−sda
−strict
</b> and
147 <b>−−sda
−whole
</b> to allow formatting
148 devices that don
’t comply to the size specifications
149 of SD cards to be formatted according to the SD Association
152 <p style=
"margin-left:22%; margin-top: 1em">NOTE: This
153 option is only a modifier to
154 <b>−−sda
−strict
</b> and
155 <b>−−sda
−whole
</b> and does not do
156 anything on its own.
</p>
159 <p style=
"margin-left:11%;"><b>−−discard
</b></p>
161 <p style=
"margin-left:22%;">This option sends a
162 ’discard
’ command, like TRIM, to the device
163 which will zero all data on it.
</p>
170 <p style=
"margin-left:11%; margin-top: 1em">If you find a
171 bug please send an email describing the problem to
172 exfat-support@tuxera.com.
</p>
175 <a name=
"AUTHORS"></a>
179 <p style=
"margin-left:11%; margin-top: 1em"><b>mkexfat
</b>
180 was written by Erik Larsson, Tuxera Inc.
</p>
183 <a name=
"AVAILABILITY"></a>
187 <p style=
"margin-left:11%; margin-top: 1em"><b>mkexfat
</b>
188 is part of the
<b>Tuxera exFAT
</b> package.
</p>
191 <a name=
"SEE ALSO"></a>
196 <p style=
"margin-left:11%; margin-top: 1em"><b>exfat
−u
</b>(
8)
</p>
