From 7ab32ae64d05f018c171ba1525bc337805d84391 Mon Sep 17 00:00:00 2001 From: Karel Zak Date: Fri, 11 Oct 2013 11:16:23 +0200 Subject: [PATCH] blockdev: add note about --setbsz usability Signed-off-by: Karel Zak --- disk-utils/blockdev.8 | 4 +++- disk-utils/blockdev.c | 2 +- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/disk-utils/blockdev.8 b/disk-utils/blockdev.8 index 2b3d64c..f4282da 100644 --- a/disk-utils/blockdev.8 +++ b/disk-utils/blockdev.8 @@ -68,7 +68,9 @@ Get size in 512-byte sectors. .IP "\fB\-\-rereadpt\fP" Reread partition table .IP "\fB\-\-setbsz\fP \fIbytes\fP" -Set blocksize. +Set blocksize. Note that the block size is specific to the current file +descriptor opening the block device, so the change of block size only persists +for as long as blockdev has the device open, and is lost once blockdev exits. .IP "\fB\-\-setfra\fP \fIsectors\fP" Set filesystem readahead (same like --setra on 2.6 kernels). .IP "\fB\-\-setra\fP \fIsectors\fP" diff --git a/disk-utils/blockdev.c b/disk-utils/blockdev.c index 4543818..d030217 100644 --- a/disk-utils/blockdev.c +++ b/disk-utils/blockdev.c @@ -127,7 +127,7 @@ static const struct bdc bdcms[] = .argname = "", .argtype = ARG_INT, .flags = FL_NORESULT, - .help = N_("set blocksize") + .help = N_("set blocksize on file descriptor opening the block device") },{ IOCTL_ENTRY(BLKGETSIZE), .name = "--getsize", -- 1.8.3.1