[linux-lvm] Snapshot behavior on classic LVM vs ThinLVM

Gionatan Danti g.danti at assyoma.it
Wed Apr 26 07:26:36 UTC 2017

Il 24-04-2017 23:59 Zdenek Kabelac ha scritto:
> If you set  '--errorwhenfull y'  - it should instantly fail.

It's my understanding that "--errorwhenfull y" will instantly fail 
writes which imply new allocation requests, but writes to 
already-allocated space will be completed.

It is possible, without messing directly with device mapper (via 
dmsetup), to configure a strict "read-only" policy, where *all* writes 
(both to allocated or not allocated space) will fail?

It is not possible to do via lvm tools, what/how device-mapper target 
should be used?

Danti Gionatan
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