Date: Wed, 11 Mar 2026 18:38:00 +0000 From: Kenneth D. Merry <ken@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 5f55c59cbab5 - stable/14 - mt(1)/libmt: Add LTO-10 density codes and specs. Message-ID: <69b1b688.21355.77a2a155@gitrepo.freebsd.org>
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The branch stable/14 has been updated by ken: URL: https://cgit.FreeBSD.org/src/commit/?id=5f55c59cbab5b06a2fcb272b345ce94c48c01c1c commit 5f55c59cbab5b06a2fcb272b345ce94c48c01c1c Author: Kenneth D. Merry <ken@FreeBSD.org> AuthorDate: 2026-03-02 19:13:47 +0000 Commit: Kenneth D. Merry <ken@FreeBSD.org> CommitDate: 2026-03-11 18:36:26 +0000 mt(1)/libmt: Add LTO-10 density codes and specs. These were obtained from IBM specs and actual tapes/drives. Standard LTO-10 cartriges hold 30TB raw, 75TB with 2.5:1 compression. Premium LTO-10 cartridges hold 40TB raw, 100TB with 2.5:1 compression. LTO-10 tape drives are not backward compatible with previous generation LTO tapes. (This is a change from older generation drives.) Since the Premium tape is a new thing for LTO, we'll call this density code LTO-10P vs. the standard LTO-10. The barcode identifier for LTO-10 tapes is "LA"; the barcode identifier for LTO-10P tapes is "PA". LTO-10 cartridges contain 1035m of tape, while LTO-10 Premium cartridges contain 1337m of tape and have slightly higher density. (Obtained from MAM data on actual tape cartridges and the density report, obtained via 'mt getdensity'.) LTO-10 cartridges use a polyethylene naphthalate (PEN) film substrate. LTO-10 Premium cartridges use an Aramid (aromatic polyamide) substrate that is thinner and stronger, allowing a longer tape to fit in the same cartridge form factor. usr.bin/mt/mt.1: Add density codes and specs for LTO-10 and LTO-10P. lib/libmt/mtlib.c: Add density codes for LTO-10 and LTO-10P. Sponsored by: Spectra Logic (cherry picked from commit 930486f9be5c884d1d2f0aae9f81a3f5af1f2718) --- lib/libmt/mtlib.c | 2 ++ usr.bin/mt/mt.1 | 9 ++++++++- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/lib/libmt/mtlib.c b/lib/libmt/mtlib.c index 43f9c95bb797..7c3cdfa072dd 100644 --- a/lib/libmt/mtlib.c +++ b/lib/libmt/mtlib.c @@ -648,6 +648,8 @@ static struct densities { { 0x5D, 19107, 485318, "LTO-M8" }, { 0x5E, 20669, 524993, "LTO-8" }, { 0x60, 23031, 584987, "LTO-9" }, + { 0x62, 21657, 550088, "LTO-10" }, + { 0x63, 22441, 570001, "LTO-10P" }, { 0x71, 11800, 299720, "3592A1 (encrypted)" }, { 0x72, 11800, 299720, "3592A2 (encrypted)" }, { 0x73, 13452, 341681, "3592A3 (encrypted)" }, diff --git a/usr.bin/mt/mt.1 b/usr.bin/mt/mt.1 index fe5506107c99..bb9e0fedf7b7 100644 --- a/usr.bin/mt/mt.1 +++ b/usr.bin/mt/mt.1 @@ -28,7 +28,7 @@ .\" .\" @(#)mt.1 8.1 (Berkeley) 6/6/93 .\" -.Dd October 31, 2023 +.Dd March 2, 2026 .Dt MT 1 .Os .Sh NAME @@ -526,6 +526,8 @@ Value Width Tracks Density Code Type Reference Note 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 0x60 12.7 (0.5) 8960 23,031 (584,987) C LTO-9 +0x62 12.7 (0.5)15104 21,657 (550,088) C LTO-10 15 +0x63 12.7 (0.5)15104 22,441 (570,001) C LTO-10P 15 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) 0x73 12.7 (0.5) 1152 13,452 (341,681) C 3592A3 (encrypted) @@ -574,6 +576,11 @@ NOTES 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. +15. LTO-10 Premium cartridges hold 40TB uncompressed vs. 30TB + uncompressed for standard LTO-10 cartridges due to slightly higher + density and stronger, thinner, longer tape. LTO-10 tape drives + are not backward compatible with previous generation LTO tape + cartridges. .Ed .Bd -literal -offset 2n NOTE ON QIC STREAMERShome | help
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