* Is it safe to shutdown while mdadm --grow is in progress.
@ 2014-10-12 5:46 Ram Ramesh
2014-10-12 8:35 ` NeilBrown
0 siblings, 1 reply; 4+ messages in thread
From: Ram Ramesh @ 2014-10-12 5:46 UTC (permalink / raw)
To: Linux Raid
I googled this topic and got differing answers. Some old ones report
horror stories and others suggest rebuild continues after reboot
normally. My array is rebuilding and it will take about 6 days to
complete. I am expecting bad weather in a couple of days and would like
to proactively shutdown the machine and reboot. Is this safe?
If the information is already available in a clear manner, please let me
know.
uname: Linux xxx 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:28:38
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
mdadm - v3.2.5 - 18th May 2012
Thanks for your help
Ramesh
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Is it safe to shutdown while mdadm --grow is in progress.
2014-10-12 5:46 Is it safe to shutdown while mdadm --grow is in progress Ram Ramesh
@ 2014-10-12 8:35 ` NeilBrown
2014-10-12 16:00 ` Ram Ramesh
0 siblings, 1 reply; 4+ messages in thread
From: NeilBrown @ 2014-10-12 8:35 UTC (permalink / raw)
To: Ram Ramesh; +Cc: Linux Raid
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On Sun, 12 Oct 2014 00:46:14 -0500 Ram Ramesh <rramesh2400@gmail.com> wrote:
> I googled this topic and got differing answers. Some old ones report
> horror stories and others suggest rebuild continues after reboot
> normally. My array is rebuilding and it will take about 6 days to
> complete. I am expecting bad weather in a couple of days and would like
> to proactively shutdown the machine and reboot. Is this safe?
>
> If the information is already available in a clear manner, please let me
> know.
>
> uname: Linux xxx 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:28:38
> UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
> mdadm - v3.2.5 - 18th May 2012
>
> Thanks for your help
>
It is certainly designed to be safe and my experience is that it is.
However it is difficult to test all corner cases so it is not impossible that
someone what quite work right.
If something does go wrong:
1/ don't panic
2/ don't try to --create the array to fix it
3/ report all details to this list and I'm 99.9% sure I can get your array
running again with all your data safe.
But I suspect it won't come to that.
NeilBrown
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Is it safe to shutdown while mdadm --grow is in progress.
2014-10-12 8:35 ` NeilBrown
@ 2014-10-12 16:00 ` Ram Ramesh
2014-10-12 22:15 ` NeilBrown
0 siblings, 1 reply; 4+ messages in thread
From: Ram Ramesh @ 2014-10-12 16:00 UTC (permalink / raw)
To: NeilBrown; +Cc: Linux Raid
Thanks. I appreciate you taking the time to respond. I would like to
forward this to those that maintain faq/wiki so that some one searches
gets the info and does not have to bother you. Is that OK?
I normally would go for backup before rebuild, but 15TB disk space is
too much to come up with, without serious $$ and need. Besides, these
are movies/recordings for htpc and the data is available on
dvds/internet. So there is inherent lack of importance. In other words,
I recommend backup as most do, but it looks like every one has some
justification not to do, and want some one else to assure them that it
is ok :-)
Thanks and Regards
Ramesh
On 10/12/2014 03:35 AM, NeilBrown wrote:
> On Sun, 12 Oct 2014 00:46:14 -0500 Ram Ramesh <rramesh2400@gmail.com> wrote:
>
>> I googled this topic and got differing answers. Some old ones report
>> horror stories and others suggest rebuild continues after reboot
>> normally. My array is rebuilding and it will take about 6 days to
>> complete. I am expecting bad weather in a couple of days and would like
>> to proactively shutdown the machine and reboot. Is this safe?
>>
>> If the information is already available in a clear manner, please let me
>> know.
>>
>> uname: Linux xxx 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:28:38
>> UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
>> mdadm - v3.2.5 - 18th May 2012
>>
>> Thanks for your help
>>
> It is certainly designed to be safe and my experience is that it is.
> However it is difficult to test all corner cases so it is not impossible that
> someone what quite work right.
> If something does go wrong:
> 1/ don't panic
> 2/ don't try to --create the array to fix it
> 3/ report all details to this list and I'm 99.9% sure I can get your array
> running again with all your data safe.
> But I suspect it won't come to that.
>
> NeilBrown
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Is it safe to shutdown while mdadm --grow is in progress.
2014-10-12 16:00 ` Ram Ramesh
@ 2014-10-12 22:15 ` NeilBrown
0 siblings, 0 replies; 4+ messages in thread
From: NeilBrown @ 2014-10-12 22:15 UTC (permalink / raw)
To: Ram Ramesh; +Cc: Linux Raid
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On Sun, 12 Oct 2014 11:00:54 -0500 Ram Ramesh <rramesh2400@gmail.com> wrote:
> Thanks. I appreciate you taking the time to respond. I would like to
> forward this to those that maintain faq/wiki so that some one searches
> gets the info and does not have to bother you. Is that OK?
Sure - anything on a public mailing list is public.
>
> I normally would go for backup before rebuild, but 15TB disk space is
> too much to come up with, without serious $$ and need. Besides, these
> are movies/recordings for htpc and the data is available on
> dvds/internet. So there is inherent lack of importance. In other words,
> I recommend backup as most do, but it looks like every one has some
> justification not to do, and want some one else to assure them that it
> is ok :-)
Quite understandable...
NeilBrown
>
> Thanks and Regards
> Ramesh
>
> On 10/12/2014 03:35 AM, NeilBrown wrote:
> > On Sun, 12 Oct 2014 00:46:14 -0500 Ram Ramesh <rramesh2400@gmail.com> wrote:
> >
> >> I googled this topic and got differing answers. Some old ones report
> >> horror stories and others suggest rebuild continues after reboot
> >> normally. My array is rebuilding and it will take about 6 days to
> >> complete. I am expecting bad weather in a couple of days and would like
> >> to proactively shutdown the machine and reboot. Is this safe?
> >>
> >> If the information is already available in a clear manner, please let me
> >> know.
> >>
> >> uname: Linux xxx 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:28:38
> >> UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
> >> mdadm - v3.2.5 - 18th May 2012
> >>
> >> Thanks for your help
> >>
> > It is certainly designed to be safe and my experience is that it is.
> > However it is difficult to test all corner cases so it is not impossible that
> > someone what quite work right.
> > If something does go wrong:
> > 1/ don't panic
> > 2/ don't try to --create the array to fix it
> > 3/ report all details to this list and I'm 99.9% sure I can get your array
> > running again with all your data safe.
> > But I suspect it won't come to that.
> >
> > NeilBrown
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^ permalink raw reply [flat|nested] 4+ messages in thread
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2014-10-12 5:46 Is it safe to shutdown while mdadm --grow is in progress Ram Ramesh
2014-10-12 8:35 ` NeilBrown
2014-10-12 16:00 ` Ram Ramesh
2014-10-12 22:15 ` NeilBrown
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