diff options
| -rw-r--r-- | misc/mke2fs.8.in | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/misc/mke2fs.8.in b/misc/mke2fs.8.in index 5f75a3c7..ddababb6 100644 --- a/misc/mke2fs.8.in +++ b/misc/mke2fs.8.in @@ -545,16 +545,31 @@ or there is no chance of recovery. .\" Check the device for bad blocks before creating the file system .\" using the specified test. .TP -.BI .BI \-t " fs-type" -Specify the filesystem (i.e., ext2, ext3, ext4, etc.) that is to be created. +Specify the filesystem type (i.e., ext2, ext3, ext4, etc.) that is to be created. If this option is not specified, .B mke2fs will pick a default either via how the command was run (for example, using a name of the form mkfs.ext2, mkfs.ext3, etc.) or via a default as defined by the .BR /etc/mke2fs.conf (5) -file. +file. This option controls which filesystem options are used by +default, based on the +.B fstypes +configuration stanza in +.BR /etc/mke2fs.conf (5). +.sp +If the +.B \-O +option is used to explicitly add or remove filesystem options that +should be set in the newly created filesystem, the +resulting filesystem may not be supported by the requested +.IR fs-type . +(e.g., "\fBmke2fs -t ext3 -O extents /dev/sdXX\fR" will create a +filesystem that is not supported by the ext3 implementation as found in +the Linux kernel; and "\fBmke2fs -t ext3 -O ^has_journal /dev/hdXX\fR" +will create a filesystem that does not have a journal and hence will not +be supported by the ext3 filesystem code in the Linux kernel.) .TP .BI \-T " usage-type[,...]" Specify how the filesystem is going to be used, so that |