Gitweb: http://git.fedorahosted.org/git/?p=lvm2.git;a=commitdiff;h=71d97fd88afa0d824... Commit: 71d97fd88afa0d8240569412bb1d3d256e596f6d Parent: efd7480de3c1be4c0e7fe2508158dce930bc2c7c Author: David Teigland teigland@redhat.com AuthorDate: Wed Feb 25 16:55:56 2015 -0600 Committer: David Teigland teigland@redhat.com CommitterDate: Wed Feb 25 16:55:56 2015 -0600
man: lvmsystemid: empty string equals no system_id
--- man/lvmsystemid.7.in | 13 ++++++++++--- 1 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/man/lvmsystemid.7.in b/man/lvmsystemid.7.in index e188c12..42eee31 100644 --- a/man/lvmsystemid.7.in +++ b/man/lvmsystemid.7.in @@ -41,7 +41,7 @@ maximum length of a system_id is 128 characters. .SS Limitations and warnings
To benefit fully from system_id, all hosts must have system_id set, and -VGs must have system_id set. A VG on shared storage can be corrupted or +VGs must have system_id set. A VG on shared storage can be damaged or destroyed in the following cases which the user must be careful to avoid:
.IP [bu] 2 @@ -220,8 +220,8 @@ local {
.SS vgcreate
-In vgcreate, a host sets its own system_id in the VG metadata. -To override this and set another system_id: +In vgcreate, the host running the command assigns its own system_id to the +new VG. To override this and set another system_id:
.B vgcreate --systemid .I SystemID VG Devices @@ -231,6 +231,9 @@ it may not be able to use. Another host with a system_id matching the one specified may not recognize the new VG without manually rescanning devices.
+If the --systemid argument is an empty string (""), the VG is created with +no system_id, making it accessible to other hosts (see warnings above.) + .SS report/display
The system_id of a VG is displayed with the "systemid" reporting option. @@ -272,6 +275,10 @@ confirmation because the host may lose access to the VG being changed: .B vgchange --systemid .I SystemID VG
+The system_id can be removed from a VG by specifying an empty string ("") +as the new system_id. This makes the VG accessible to other hosts (see +warnings above.) + A host cannot directly change the system_id of a foreign VG.
To move a VG from one host to another, vgexport and vgimport should be
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