Date: Sun, 11 Mar 2012 13:35:24 +0400 From: "Andrey V. Elsukov" <bu7cher@yandex.ru> To: freebsd-current <freebsd-current@freebsd.org>, freebsd-geom@FreeBSD.org Subject: [RFC, RFT] LDM support (aka Windows Dynamic Volumes) Message-ID: <4F5C71DC.3010203@yandex.ru>
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[-- Attachment #1 --] Hi, All i wrote GEOM_PART_LDM class. It provides basic support of Logical Disk Manager partitioning scheme [1]. Since LDM metadata is not documented i used several articles found in the web and linux implementation as reference [2]. Only generic volumes is supported. Spanned, striped and raid5 configurations aren't implemented. Mirrored volumes also are not shown by default, but they can be accessed when kern.geom.part.ldm.show_mirrors=1 (by your own risk). Currently only LDM on top of MBR is supported. Also only "gpart destroy" is allowed with LDM scheme. you can compile class without patching, the source code is here: http://people.freebsd.org/~ae/LDM/ [1] http://en.wikipedia.org/wiki/Logical_Disk_Manager [2] http://fxr.watson.org/fxr/source/fs/partitions/?v=linux-2.6 Example: /* da1 and da2 disks without geom_part_ldm module */ # gpart show da1 da2 => 63 104857537 da1 MBR (50G) 63 1985 1 ms-ldm-data (992k) 2048 204800 2 ms-ldm-data [active] (100M) 206848 104648704 3 ms-ldm-data (49G) 104855552 2048 - free - (1.0M) => 32 2097120 da2 MBR (1.0G) 32 31 - free - (15k) 63 2095041 1 ms-ldm-data (1G) 2095104 2048 - free - (1.0M) # kldload ./geom_part_ldm.ko # gpart show da1 da2 => 63 104855489 da1 LDM (50G) 63 1985 - free - (992k) 2048 204800 1 ntfs (100M) 206848 104648704 2 ntfs (49G) => 63 2095041 da2 LDM (1.0G) 63 65 - free - (32k) 128 1024000 1 ntfs (500M) 1024128 1067008 2 ntfs (521M) 2091136 3968 - free - (2M) -- WBR, Andrey V. Elsukov [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (MingW32) iQEcBAEBAgAGBQJPXHHhAAoJEAHF6gQQyKF6BIIH/1Rq30YX83eR+4+1i4IRYF8I BBAsMEblYUArNkNJ+tE+El0sxSDHHYAVusR54+jTpXw8/EjHbrjaEppF+6yZZcNg kGMZo7wiHg5ajJynjR2OritM/qP+8a4Rs1koOkVeOT1UBsOcE299JtAa5REDWkxl CKbu60KSm8M3xCE8/BqfRqLTk7VVGPzItRUJqkGsESph73rlAeG2ju873JlBcmDa bltifVx4DB19ZH7NbuelAgT8XY5RRw6593B6q3/ip8/j1mnSV/z3rgCuyfDbLrpc GhgT0U7vsFJWaU3I+yeu6RDeTVSm5K2uifK5nzFMWvUn8W3d+n87nR4I4+kcivo= =/jHf -----END PGP SIGNATURE-----
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