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Add density code for DAT-72, and notes on DAT-160.

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As it turns out, the density code for DAT-160 (0x48) is the same
as for SDLT220.  Since the SDLT values are already in the table,
we will leave them in place.

Thanks to Harald Schmalzbauer for confirming the DAT-72 density code.

lib/libmt/mtlib.c:
	Add DAT-72 density code, and commented out DAT-160 density
	code.  Explain why DAT-160 is commented out.  Add notes
	explaining where the bpi values for these formats came from.

usr.bin/mt/mt.1:
	Add DAT-72 density code, and add a note explaining that
	the SDLTTapeI(110) density code (0x48) is the same as
	DAT-160.

Sponsored by:	Spectra Logic
MFC after:	3 weeks
This commit is contained in:
Kenneth D. Merry 2015-03-03 22:49:07 +00:00
parent 58bdb0761c
commit 5090c893b7
2 changed files with 21 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
lib/libmt/mtlib.c
View File

@ -568,6 +568,15 @@ static struct densities {
*
* IBM 3592 definitions obtained from second edition of the IBM
* System Storage Tape Drive 3592 SCSI Reference (May 25, 2012).
*
* DAT-72 and DAT-160 bpi values taken from "HP StorageWorks DAT160
* tape drive white paper", dated June 2007.
*
* DAT-160 / SDLT220 density code (0x48) conflict information
* found here:
*
* http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c01065117&sp4ts.oid=429311
* (Document ID c01065117)
*/
/*Num. bpmm bpi Reference */
{ 0x1, 32, 800, "X3.22-1983" },
@ -613,6 +622,14 @@ static struct densities {
{ 0x42, 7398, 187909, "LTO-2" },
{ 0x44, 9638, 244805, "LTO-3" },
{ 0x46, 12725, 323215, "LTO-4" },
{ 0x47, 6417, 163000, "DAT-72" },
/*
* XXX KDM note that 0x48 is also the density code for DAT-160.
* For some reason they used overlapping density codes.
*/
#if 0
{ 0x48, 6870, 174500, "DAT-160" },
#endif
{ 0x48, 5236, 133000, "SDLTapeI(110)" },
{ 0x49, 7598, 193000, "SDLTapeI(160)" },
{ 0x4a, 0, 0, "T10000A" },

6
usr.bin/mt/mt.1
View File

@ -29,7 +29,7 @@
.\" @(#)mt.1 8.1 (Berkeley) 6/6/93
.\" $FreeBSD$
.\"
.Dd February 12, 2014
.Dd March 3, 2014
.Dt MT 1
.Os
.Sh NAME
@ -503,7 +503,8 @@ Value Width Tracks Density Code Type Reference Note
0x42 12.7 (0.5) 512 7,398 (187,909) C LTO-2
0x44 12.7 (0.5) 704 9,638 (244,805) C LTO-3
0x46 12.7 (0.5) 896 12,725 (323,215) C LTO-4
0x48 12.7 (0.5) 448 5,236 (133,000) PRML C SDLTapeI(110) 6,8
0x47 3.81 (0.25) ? 6,417 (163,000) CS DAT-72
0x48 12.7 (0.5) 448 5,236 (133,000) PRML C SDLTapeI(110) 6,8,13
0x49 12.7 (0.5) 448 7,598 (193,000) PRML C SDLTapeI(160) 6,8
0x4A 12.7 (0.5) 768 ? C T10000A 10
0x4B 12.7 (0.5) 1152 ? C T10000B 10
@ -556,6 +557,7 @@ NOTES
density code is 0x90.
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.
.Ed
.Sh ENVIRONMENT
.Bl -tag -width ".Ev TAPE"