clarifying what can be done during resync

clarifying what can be done during resync

[Sandra Escandor]

Hello,

Just wanted to make sure if this was a myth or not: Is it true that when
an array is in resync status, then mounting it is not at all possible?

Thanks,
Sandra

Re: clarifying what can be done during resync

[NeilBrown]

On Thu, 23 Jun 2011 15:38:06 -0400 "Sandra Escandor" <sescandor@evertz.com>
wrote:

> Hello,
> 
> Just wanted to make sure if this was a myth or not: Is it true that when
> an array is in resync status, then mounting it is not at all possible?
>

Pure myth.  Where did you hear it?

Best approach is to try .. if it is not at all possible, then it won't work.
But in fact it does :-)

NeilBrown

RE: clarifying what can be done during resync

[Sandra Escandor]

Thanks for clarifying, Neil. I actually came across this on someone's
blog explaining how they got RAID10 (with imsm metadata) up and running,
and he mentions that he made sure to wait until resync was done before
mounting. I did the same thing, thinking that maybe I might break
something if I didn't.

Sandra

-----Original Message-----
From: NeilBrown [mailto:neilb@suse.de] 
Sent: Monday, June 27, 2011 1:47 AM
To: Sandra Escandor
Cc: linux-raid@vger.kernel.org
Subject: Re: clarifying what can be done during resync

On Thu, 23 Jun 2011 15:38:06 -0400 "Sandra Escandor"
<sescandor@evertz.com>
wrote:

> Hello,
> 
> Just wanted to make sure if this was a myth or not: Is it true that
when
> an array is in resync status, then mounting it is not at all possible?
>

Pure myth.  Where did you hear it?

Best approach is to try .. if it is not at all possible, then it won't
work.
But in fact it does :-)

NeilBrown

Re: clarifying what can be done during resync

[David Brown]

The whole point of raid is to minimize downtime - that means that if a 
disk fails, you can remove it, replace it, and resync while everything 
is running (albeit a bit slower).



On 27/06/2011 14:35, Sandra Escandor wrote:
> Thanks for clarifying, Neil. I actually came across this on someone's
> blog explaining how they got RAID10 (with imsm metadata) up and running,
> and he mentions that he made sure to wait until resync was done before
> mounting. I did the same thing, thinking that maybe I might break
> something if I didn't.
>
> Sandra
>
> -----Original Message-----
> From: NeilBrown [mailto:neilb@suse.de]
> Sent: Monday, June 27, 2011 1:47 AM
> To: Sandra Escandor
> Cc: linux-raid@vger.kernel.org
> Subject: Re: clarifying what can be done during resync
>
> On Thu, 23 Jun 2011 15:38:06 -0400 "Sandra Escandor"
> <sescandor@evertz.com>
> wrote:
>
>> Hello,
>>
>> Just wanted to make sure if this was a myth or not: Is it true that
> when
>> an array is in resync status, then mounting it is not at all possible?
>>
>
> Pure myth.  Where did you hear it?
>
> Best approach is to try .. if it is not at all possible, then it won't
> work.
> But in fact it does :-)
>
> NeilBrown
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