From 88ede8454fd90db2dc945e7f0ef0a5775ed13bd5 Mon Sep 17 00:00:00 2001
From: ken <ken@FreeBSD.org>
Date: Fri, 3 Nov 2017 21:04:22 +0000
Subject: [PATCH] Add the LTO-8 Type M density code (0x5d, LTO-8M) to libmt and
 the mt(1) man page.

LTO-8 Type M (also known as M8) is a pristine LTO-7 cartridge
formatted in a LTO-8 drive in a new, higher density format.  It
has a separate density code, and is only readable in an LTO-8
drive.

lib/libmt/mtlib.c:
	Add the LTO-8 Type M density code to the density table
	in libmt.

usr.bin/mt/mt.1:
	Add the LTO-8 Type M density code to the density
	table in the mt(1) man page.

MFC after:	3 days
Sponsored by:	Spectra Logic
---
 lib/libmt/mtlib.c | 1 +
 usr.bin/mt/mt.1   | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/libmt/mtlib.c b/lib/libmt/mtlib.c
index 08dce9d4a6b0..0ada983823a1 100644
--- a/lib/libmt/mtlib.c
+++ b/lib/libmt/mtlib.c
@@ -645,6 +645,7 @@ static struct densities {
 	{ 0x58, 15142,  384607, "LTO-5" },
 	{ 0x5A, 15142,  384607, "LTO-6" },
 	{ 0x5C, 19107,  485318, "LTO-7" },
+	{ 0x5D, 19107,  485318, "LTO-M8" },
 	{ 0x5E, 20669,  524993, "LTO-8" },
 	{ 0x71, 11800,  299720, "3592A1 (encrypted)" },
 	{ 0x72, 11800,  299720, "3592A2 (encrypted)" },
diff --git a/usr.bin/mt/mt.1 b/usr.bin/mt/mt.1
index 73ce0978d563..287be2ee7f64 100644
--- a/usr.bin/mt/mt.1
+++ b/usr.bin/mt/mt.1
@@ -29,7 +29,7 @@
 .\"	@(#)mt.1	8.1 (Berkeley) 6/6/93
 .\" $FreeBSD$
 .\"
-.Dd August 11, 2017
+.Dd November 3, 2017
 .Dt MT 1
 .Os
 .Sh NAME
@@ -522,6 +522,7 @@ Value  Width        Tracks    Density         Code Type Reference   Note
 0x58   12.7  (0.5) 1280      15,142 (384,607)       C   LTO-5
 0x5A   12.7  (0.5) 2176      15,142 (384,607)       C   LTO-6
 0x5C   12.7  (0.5) 3584      19,107 (485,318)       C   LTO-7
+0x5D   12.7  (0.5) 5376      19,107 (485,318)       C   LTO-M8       14
 0x5E   12.7  (0.5) 6656      20,669 (524,993)       C   LTO-8
 0x71   12.7  (0.5)  512      11,800 (299,720)       C   3592A1 (encrypted)
 0x72   12.7  (0.5)  896      11,800 (299,720)       C   3592A2 (encrypted)
@@ -565,6 +566,10 @@ NOTES
 12. This is Exabyte 8500 uncompressed format.  The compressed format
     density code is 0x8c.
 13. This density code (0x48) was also used for DAT-160.
+14. Officially known as LTO-8 Type M, abbreviated M8.  This is a pristine
+    LTO-7 cartridge initialized with a higher density format by an LTO-8
+    drive.  It cannot be read by an LTO-7 drive.  Uncompressed capacity
+    is 9TB, compared to 6TB for LTO-7 and 12TB for LTO-8.
 .Ed
 .Bd -literal -offset 2n
 NOTE ON QIC STREAMERS