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diff --git a/Documentation/ldm.txt b/Documentation/ldm.txt deleted file mode 100644 index 4f80edd14d0a..000000000000 --- a/Documentation/ldm.txt +++ /dev/null @@ -1,109 +0,0 @@ - - LDM - Logical Disk Manager (Dynamic Disks) - ------------------------------------------ - -Originally Written by FlatCap - Richard Russon <ldm@flatcap.org>. -Last Updated by Anton Altaparmakov on 30 March 2007 for Windows Vista. - -Overview --------- - -Windows 2000, XP, and Vista use a new partitioning scheme. It is a complete -replacement for the MSDOS style partitions. It stores its information in a -1MiB journalled database at the end of the physical disk. The size of -partitions is limited only by disk space. The maximum number of partitions is -nearly 2000. - -Any partitions created under the LDM are called "Dynamic Disks". There are no -longer any primary or extended partitions. Normal MSDOS style partitions are -now known as Basic Disks. - -If you wish to use Spanned, Striped, Mirrored or RAID 5 Volumes, you must use -Dynamic Disks. The journalling allows Windows to make changes to these -partitions and filesystems without the need to reboot. - -Once the LDM driver has divided up the disk, you can use the MD driver to -assemble any multi-partition volumes, e.g. Stripes, RAID5. - -To prevent legacy applications from repartitioning the disk, the LDM creates a -dummy MSDOS partition containing one disk-sized partition. This is what is -supported with the Linux LDM driver. - -A newer approach that has been implemented with Vista is to put LDM on top of a -GPT label disk. This is not supported by the Linux LDM driver yet. - - -Example -------- - -Below we have a 50MiB disk, divided into seven partitions. -N.B. The missing 1MiB at the end of the disk is where the LDM database is - stored. - - Device | Offset Bytes Sectors MiB | Size Bytes Sectors MiB - -------+----------------------------+--------------------------- - hda | 0 0 0 | 52428800 102400 50 - hda1 | 51380224 100352 49 | 1048576 2048 1 - hda2 | 16384 32 0 | 6979584 13632 6 - hda3 | 6995968 13664 6 | 10485760 20480 10 - hda4 | 17481728 34144 16 | 4194304 8192 4 - hda5 | 21676032 42336 20 | 5242880 10240 5 - hda6 | 26918912 52576 25 | 10485760 20480 10 - hda7 | 37404672 73056 35 | 13959168 27264 13 - -The LDM Database may not store the partitions in the order that they appear on -disk, but the driver will sort them. - -When Linux boots, you will see something like: - - hda: 102400 sectors w/32KiB Cache, CHS=50/64/32 - hda: [LDM] hda1 hda2 hda3 hda4 hda5 hda6 hda7 - - -Compiling LDM Support ---------------------- - -To enable LDM, choose the following two options: - - "Advanced partition selection" CONFIG_PARTITION_ADVANCED - "Windows Logical Disk Manager (Dynamic Disk) support" CONFIG_LDM_PARTITION - -If you believe the driver isn't working as it should, you can enable the extra -debugging code. This will produce a LOT of output. The option is: - - "Windows LDM extra logging" CONFIG_LDM_DEBUG - -N.B. The partition code cannot be compiled as a module. - -As with all the partition code, if the driver doesn't see signs of its type of -partition, it will pass control to another driver, so there is no harm in -enabling it. - -If you have Dynamic Disks but don't enable the driver, then all you will see -is a dummy MSDOS partition filling the whole disk. You won't be able to mount -any of the volumes on the disk. - - -Booting -------- - -If you enable LDM support, then lilo is capable of booting from any of the -discovered partitions. However, grub does not understand the LDM partitioning -and cannot boot from a Dynamic Disk. - - -More Documentation ------------------- - -There is an Overview of the LDM together with complete Technical Documentation. -It is available for download. - - http://www.linux-ntfs.org/ - -If you have any LDM questions that aren't answered in the documentation, email -me. - -Cheers, - FlatCap - Richard Russon - ldm@flatcap.org - |