* doubt about raid 'quality'
@ 2012-07-16 15:56 Roberto Spadim
2012-07-17 0:34 ` Mathias Burén
0 siblings, 1 reply; 6+ messages in thread
From: Roberto Spadim @ 2012-07-16 15:56 UTC (permalink / raw)
To: Linux-RAID
hi guys, some days ago, i lost some data from my mysql database, it
was running nice, but start given bad record (one of my disks is bad)
i read some time ago about checks on md raids, could it be done
weekly? it´s a raid1 md device, i don´t know if it´s possible because
i read about raid5/6 devices only
it´s a newbie question, sorry
--
Roberto Spadim
Spadim Technology / SPAEmpresarial
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: doubt about raid 'quality'
2012-07-16 15:56 doubt about raid 'quality' Roberto Spadim
@ 2012-07-17 0:34 ` Mathias Burén
2012-07-17 3:00 ` Roberto Spadim
0 siblings, 1 reply; 6+ messages in thread
From: Mathias Burén @ 2012-07-17 0:34 UTC (permalink / raw)
To: Roberto Spadim; +Cc: Linux-RAID
On 16 July 2012 16:56, Roberto Spadim <roberto@spadim.com.br> wrote:
> hi guys, some days ago, i lost some data from my mysql database, it
> was running nice, but start given bad record (one of my disks is bad)
> i read some time ago about checks on md raids, could it be done
> weekly? it´s a raid1 md device, i don´t know if it´s possible because
> i read about raid5/6 devices only
> it´s a newbie question, sorry
>
> --
> Roberto Spadim
> Spadim Technology / SPAEmpresarial
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
Doesn't
echo check >> /sys/block/md0/md/sync_action
work?
Mathias
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: doubt about raid 'quality'
2012-07-17 0:34 ` Mathias Burén
@ 2012-07-17 3:00 ` Roberto Spadim
2012-07-17 8:12 ` Igor M Podlesny
0 siblings, 1 reply; 6+ messages in thread
From: Roberto Spadim @ 2012-07-17 3:00 UTC (permalink / raw)
To: Mathias Burén; +Cc: Linux-RAID
humm and how i know if the check is ok?
2012/7/16 Mathias Burén <mathias.buren@gmail.com>:
> On 16 July 2012 16:56, Roberto Spadim <roberto@spadim.com.br> wrote:
>> hi guys, some days ago, i lost some data from my mysql database, it
>> was running nice, but start given bad record (one of my disks is bad)
>> i read some time ago about checks on md raids, could it be done
>> weekly? it´s a raid1 md device, i don´t know if it´s possible because
>> i read about raid5/6 devices only
>> it´s a newbie question, sorry
>>
>> --
>> Roberto Spadim
>> Spadim Technology / SPAEmpresarial
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>
> Doesn't
>
> echo check >> /sys/block/md0/md/sync_action
>
> work?
>
> Mathias
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> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
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--
Roberto Spadim
Spadim Technology / SPAEmpresarial
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: doubt about raid 'quality'
2012-07-17 3:00 ` Roberto Spadim
@ 2012-07-17 8:12 ` Igor M Podlesny
2012-07-17 8:33 ` Roberto Spadim
0 siblings, 1 reply; 6+ messages in thread
From: Igor M Podlesny @ 2012-07-17 8:12 UTC (permalink / raw)
To: Roberto Spadim; +Cc: Mathias Burén, Linux-RAID, NeilBrown
On 17 July 2012 11:00, Roberto Spadim <roberto@spadim.com.br> wrote:
> humm and how i know if the check is ok?
Kinda like that: watch -n3 cat /proc/mdstat
/sys/block/md123/md/mismatch_cnt -- if you want to keep your finger on
its pulse, or simply cat the counter's file when it's done.
Neil, I have already thought bout it -- maybe check/repair action
should output mismatch_cnt into dmesg's buffer after its completion?
--
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: doubt about raid 'quality'
2012-07-17 8:12 ` Igor M Podlesny
@ 2012-07-17 8:33 ` Roberto Spadim
2012-07-17 9:40 ` Igor M Podlesny
0 siblings, 1 reply; 6+ messages in thread
From: Roberto Spadim @ 2012-07-17 8:33 UTC (permalink / raw)
To: Igor M Podlesny; +Cc: Mathias Burén, Linux-RAID, NeilBrown
hum, and what happen if mismatch_cnt get bigger and bigger... it´s a
problem? what it´s mean? diferent blocks on mirrors (raid1)?
2012/7/17 Igor M Podlesny <for.poige+lsr@gmail.com>
>
> On 17 July 2012 11:00, Roberto Spadim <roberto@spadim.com.br> wrote:
> > humm and how i know if the check is ok?
>
> Kinda like that: watch -n3 cat /proc/mdstat
> /sys/block/md123/md/mismatch_cnt -- if you want to keep your finger on
> its pulse, or simply cat the counter's file when it's done.
>
> Neil, I have already thought bout it -- maybe check/repair action
> should output mismatch_cnt into dmesg's buffer after its completion?
>
> --
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
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--
Roberto Spadim
Spadim Technology / SPAEmpresarial
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: doubt about raid 'quality'
2012-07-17 8:33 ` Roberto Spadim
@ 2012-07-17 9:40 ` Igor M Podlesny
0 siblings, 0 replies; 6+ messages in thread
From: Igor M Podlesny @ 2012-07-17 9:40 UTC (permalink / raw)
To: Roberto Spadim; +Cc: Mathias Burén, Linux-RAID, NeilBrown
On 17 July 2012 16:33, Roberto Spadim <roberto@spadim.com.br> wrote:
> hum, and what happen if mismatch_cnt get bigger and bigger... it´s a
> problem? what it´s mean? diferent blocks on mirrors (raid1)?
exactly
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2012-07-17 9:40 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-07-16 15:56 doubt about raid 'quality' Roberto Spadim
2012-07-17 0:34 ` Mathias Burén
2012-07-17 3:00 ` Roberto Spadim
2012-07-17 8:12 ` Igor M Podlesny
2012-07-17 8:33 ` Roberto Spadim
2012-07-17 9:40 ` Igor M Podlesny
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