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authorKenneth D. Merry <ken@FreeBSD.org>2026-03-02 19:13:47 +0000
committerKenneth D. Merry <ken@FreeBSD.org>2026-03-11 18:36:26 +0000
commit5f55c59cbab5b06a2fcb272b345ce94c48c01c1c (patch)
tree1e4c0117085076059c3965b7b236452af89179c7 /sys/arm64/include/cpuinfo.h
parentb9c0e0c77036a83b2d1b6993224370b686446d6a (diff)
mt(1)/libmt: Add LTO-10 density codes and specs.stable/14
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)
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