Documentation update
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/HOWTO b/HOWTO
index d320ab3..3e1e62a 100644
--- a/HOWTO
+++ b/HOWTO
@@ -823,7 +823,9 @@
it in the header of each block.
crc32c-intel Use hardware assisted crc32c calcuation
- provided on SSE4.2 enabled processors.
+ provided on SSE4.2 enabled processors. Falls
+ back to regular software crc32c, if not
+ supported by the system.
crc32 Use a crc32 sum of the data area and store
it in the header of each block.
diff --git a/fio.1 b/fio.1
index a42eb98..e737906 100644
--- a/fio.1
+++ b/fio.1
@@ -602,7 +602,9 @@
.RS
.TP
.B md5 crc16 crc32 crc32c crc32c-intel crc64 crc7 sha256 sha512 sha1
-Store appropriate checksum in the header of each block.
+Store appropriate checksum in the header of each block. crc32c-intel is
+hardware accelerated SSE4.2 driven, falls back to regular crc32c if
+not supported by the system.
.TP
.B meta
Write extra information about each I/O (timestamp, block number, etc.). The