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Remove documentation describing functionality which geom(4) does not,

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in fact, provide.

Reviewed by:	phk
MFC after:	3 days
Approved by:	re (gjb)
This commit is contained in:
Colin Percival 2013-09-10 21:16:18 +00:00
parent 40274a2d65
commit 27789e56b2
1 changed files with 1 additions and 19 deletions
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20
share/man/man4/geom.4
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@ -34,7 +34,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd March 14, 2013
.Dd September 10, 2013
.Dt GEOM 4
.Os
.Sh NAME
@ -354,24 +354,6 @@ only be done with their cooperation.
Finally: the spoiling only happens when the write count goes from
zero to non-zero and the retasting happens only when the write count goes
from non-zero to zero.
.It Em INSERT/DELETE
are very special operations which allow a new geom
to be instantiated between a consumer and a provider attached to
each other and to remove it again.
.Pp
To understand the utility of this, imagine a provider
being mounted as a file system.
Between the DEVFS geom's consumer and its provider we insert
a mirror module which configures itself with one mirror
copy and consequently is transparent to the I/O requests
on the path.
We can now configure yet a mirror copy on the mirror geom,
request a synchronization, and finally drop the first mirror
copy.
We have now, in essence, moved a mounted file system from one
disk to another while it was being used.
At this point the mirror geom can be deleted from the path
again; it has served its purpose.
.It Em CONFIGURE
is the process where the administrator issues instructions
for a particular class to instantiate itself.