.B \-b
.I boundary_alignment
] [
+.B \-s
+.I sector_size
+] [
.B \-c
.I cluster_size
] [
.TE
The default is always 1 MiB.
.TP
+.BR \-s ", " \-\-sector\-size =\fIsize\fR
+Specifies the sector size of the exFAT file system.
+The \fIsize\fR argument is specified in bytes or may be specified with
+\fBk\fR/\fBK\fR suffix for kibibytes and must either 512, 1024, 2048 or 4096
+bytes.
+The default value is the sector size reported by the device, or 512 bytes if the
+device sector size cannot be determined.
+.TP
.BR \-c ", " \-\-cluster\-size =\fIsize\fR
Specifies the cluster size of the exFAT file system.
The \fIsize\fR argument is specified in bytes or may be specified with