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man lvmsystemid: change some wording

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Clarify the wording in a couple cases.
This commit is contained in:
David Teigland 2017-05-23 10:50:08 -05:00
parent 5e8beb4023
commit 4d261cd719
1 changed files with 8 additions and 9 deletions
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17
man/lvmsystemid.7_main
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@ -94,19 +94,18 @@ corrupting the PVs. See the
section for more information.
.IP \[bu] 2
The system ID does not protect devices in VG from programs other than LVM.
The system ID does not protect devices in a VG from programs other than LVM.
.IP \[bu] 2
A host using an old version of LVM without the system ID feature will not
recognize a system ID in VGs from other hosts. Even though the old
version of LVM is not blocked from reading a VG with a system ID, it is
blocked from writing to the VG (or its LVs). The system ID feature
changes the write mode of a VG, making it appear read-only to previous
versions of LVM.
A host using an old LVM version (without the system ID feature) will not
recognize a system ID set in VGs. The old LVM can read a VG with a
system ID, but is prevented from writing to the VG (or its LVs).
The system ID feature changes the write mode of a VG, making it appear
read-only to previous versions of LVM.
This also means that if a host downgrades its version of LVM, it would
This also means that if a host downgrades to the old LVM version, it would
lose access to any VGs it had created with a system ID. To avoid this,
the system ID should be removed from VGs before downgrading to an LVM
the system ID should be removed from local VGs before downgrading LVM to a
version without the system ID feature.