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-rw-r--r--disk-utils/blockdev.84
1 files changed, 3 insertions, 1 deletions
diff --git a/disk-utils/blockdev.8 b/disk-utils/blockdev.8
index fb0060638..5d85c01b7 100644
--- a/disk-utils/blockdev.8
+++ b/disk-utils/blockdev.8
@@ -44,7 +44,9 @@ Flush buffers.
.IP "\fB\-\-getalignoff\fP"
Get alignment offset.
.IP "\fB\-\-getbsz\fP"
-Print blocksize in bytes.
+Print blocksize in bytes. This size does not describe device topology. It's
+size used internally by kernel and it maybe modified (for example) by
+filesystem driver on mount.
.IP "\fB\-\-getdiscardzeroes\fP"
Get discard zeroes support status.
.IP "\fB\-\-getfra\fP"