Signed-off-by: Michael Kerrisk (man-pages) <mtk.manpages@xxxxxxxxx> --- disk-utils/raw.8 | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/disk-utils/raw.8 b/disk-utils/raw.8 index ba9fd256a..d569507b8 100644 --- a/disk-utils/raw.8 +++ b/disk-utils/raw.8 @@ -34,10 +34,10 @@ device numbers, or as a path name to an existing block device file. .PP The bindings already in existence can be queried with the -.I \-q +.B \-q option, which is used either with a raw device filename to query that one device, or with the -.I \-a +.B \-a option to query all bound raw devices. .PP Unbinding can be done by specifying major and minor 0. @@ -66,8 +66,8 @@ will query an existing binding instead of setting a new one. .TP \fB\-a\fR, \fB\-\-all\fR With -.B \-q -, specify that all bound raw devices should be queried. +.BR \-q , +specify that all bound raw devices should be queried. .TP \fB\-h\fR, \fB\-\-help\fR Display help text and exit. @@ -78,20 +78,23 @@ Display version information and exit. .SH NOTES Rather than using raw devices applications should prefer .BR open (2) -devices, such as /dev/sda1, with the O_DIRECT flag. +devices, such as +.IR /dev/sda1 , +with the +.B O_DIRECT +flag. .SH BUGS The Linux .BR dd (1) command should be used without the \fBbs=\fR option, or the blocksize needs to be a multiple of the sector size of the device (512 bytes usually), otherwise it will fail with "Invalid Argument" messages (EINVAL). - .PP Raw I/O devices do not maintain cache coherency with the Linux block device buffer cache. If you use raw I/O to overwrite data already in the buffer cache, the buffer cache will no longer correspond to the contents of the actual storage device underneath. This is deliberate, -but is regarded either a bug or a feature depending on who you ask! +but is regarded as either a bug or a feature, depending on who you ask! .SH AUTHORS Stephen Tweedie (sct@xxxxxxxxxx) .SH AVAILABILITY -- 2.26.2
