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Document GEOM_PART_LDM scheme and partition types.

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MFC after:	1 month
This commit is contained in:
Andrey V. Elsukov 2012-03-19 13:17:47 +00:00
parent e800e2e159
commit 8da4c41364
1 changed files with 38 additions and 2 deletions
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40
sbin/geom/class/part/gpart.8
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@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd January 8, 2012
.Dd March 19, 2012
.Dt GPART 8
.Os
.Sh NAME
@ -38,6 +38,7 @@ lines in the kernel configuration file:
.Cd "options GEOM_PART_APM"
.Cd "options GEOM_PART_BSD"
.Cd "options GEOM_PART_GPT"
.Cd "options GEOM_PART_LDM"
.Cd "options GEOM_PART_MBR"
.Cd "options GEOM_PART_EBR"
.Cd "options GEOM_PART_EBR_COMPAT"
@ -511,6 +512,12 @@ called
Requires the
.Cm GEOM_PART_BSD
kernel option.
.It Cm LDM
The Logical Disk Manager is an implementation of volume manager for
Microsoft Windows NT.
Requires the
.Cd GEOM_PART_LDM
kernel option.
.It Cm GPT
GUID Partition Table is used on Intel-based Macintosh computers and
gradually replacing MBR on most PCs and other systems.
@ -559,7 +566,7 @@ The
utility also allows the user to specify scheme-specific partition types
for partition types that do not have symbolic names.
Symbolic names currently understood are:
.Bl -tag -width ".Cm freebsd-vinum"
.Bl -tag -width ".Cm ms-ldm-metadata"
.It Cm bios-boot
The system partition dedicated to second stage of the boot loader program.
Usually it is used by the GRUB 2 loader for GPT partitioning schemes.
@ -634,6 +641,18 @@ A partition that is sub-partitioned by a Master Boot Record (MBR).
This type is known as
.Qq Li "!024dee41-33e7-11d3-9d69-0008c781f39f"
by GPT.
.It Cm ms-ldm-data
A partition that contains Logical Disk Manager (LDM) volumes.
The scheme-specific types are
.Qq Li "!66"
for MBR,
.Qq Li "!af9b60a0-1431-4f62-bc68-3311714a69ad"
for GPT.
.It Cm ms-ldm-metadata
A partition that contains Logical Disk Manager (LDM) database.
The scheme-specifig type is
.Qq Li "!5808c8aa-7e8f-42e0-85d2-e1e90434cfb3"
for GPT.
.El
.Sh ATTRIBUTES
The scheme-specific attributes for EBR:
@ -938,6 +957,23 @@ disk metadata.
If some inconsistency is detected, the partition table will be
rejected with a diagnostic message:
.Sy "GEOM_PART: Integrity check failed (provider, scheme)" .
.It Va kern.geom.part.ldm.debug : No 0
Debug level of the Logical Disk Manager (LDM) module.
This can be set to a number between 0 and 2 inclusive.
If set to 0 minimal debug information is printed,
and if set to 2 the maximum amount of debug information is printed.
.It Va kern.geom.part.ldm.show_mirrors : No 0
This variable controls how the Logical Disk Manager (LDM) module handles
mirrored volumes.
By default mirrored volumes are shown as partitions with type
.Cm ms-ldm-data
(see the
.Sx "PARTITION TYPES"
section).
If this variable set to 1 each component of the mirrored volume will be
present as independet partition.
.Em NOTE :
This may break a mirrored volume and lead to data damage.
.El
.Sh EXIT STATUS
Exit status is 0 on success, and 1 if the command fails.