X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=HOWTO;h=60eab243caadf8c473166c0d56816adb5ffbc397;hp=6c7abcc7979d275a0bea276fd09deae69a587fec;hb=f24c26495d0a03960453326068873d499e3de16b;hpb=66347cfa2f73fd76257e058a3649de437c6eccbe

diff --git a/HOWTO b/HOWTO
index 6c7abcc7..60eab243 100644
--- a/HOWTO
+++ b/HOWTO
@@ -387,6 +387,8 @@ rw=str		Type of io pattern. Accepted values are:
 			randread	Random reads
 			rw,readwrite	Sequential mixed reads and writes
 			randrw		Random mixed reads and writes
+			trimwrite	Mixed trims and writes. Blocks will be
+					trimmed first, then written to.
 
 		For the mixed io types, the default is to split them 50/50.
 		For certain types of io the result may still be skewed a bit,
@@ -770,6 +772,15 @@ ioengine=str	Defines how the job issues io to the file. The following
 				necessary environment variables to work with
 				hdfs/libhdfs properly.
 
+			mtd	Read, write and erase an MTD character device
+				(e.g., /dev/mtd0). Discards are treated as
+				erases. Depending on the underlying device
+				type, the I/O may have to go in a certain
+				pattern, e.g., on NAND, writing sequentially
+				to erase blocks and discarding before
+				overwriting. The writetrim mode works well
+				for this constraint.
+
 			external Prefix to specify loading an external
 				IO engine object file. Append the engine
 				filename, eg ioengine=external:/tmp/foo.o
@@ -1721,6 +1732,7 @@ be the starting port number since fio will use a range of ports.
 		1 	  : allocate space immidietly inside defragment event,
 			    and free right after event
 
+[mtd] skip_bad=bool	Skip operations against known bad blocks.
 
 
 6.0 Interpreting the output