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Re: [lvm-devel] [PATCH] Fix read-only warning for partial volume



On 06/30/10 12:46, Alasdair G Kergon wrote:
> On Wed, Jun 30, 2010 at 12:25:00PM -0400, Takahiro Yasui wrote:
>>   Partial mode. Incomplete volumes will be activated.
> 
> log_print("Partial mode. Incomplete logical volumes will be processed.");
> 
> Yes, the focus is on LVs not VGs

Thank you for committing it.

> As MISSING_PV handling has become default behaviour, what *extra* does
> --partial offer?

The latest lvm command works as you mentioned only when a logical volume
is on valid physical volumes, but lvchange or vgchange fails if a logical volume
contains invalid devices. In that case, we still  need --partial option.

For example, LV is on PV1 and PV2 for linear, stripe or mirror, and PV2 is
missing. With --partial option, we can activate LV and read/write it. This is
very important especially for mirror volume.

It is ideal that a logical volume can be activated without --partial option.
And in that case,  we don't need --partial option.

Thanks,
Taka


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