* scrubbing in linux volume manager
@ 2011-01-27 5:02 sanoj
2011-01-27 23:32 ` Greg Freemyer
0 siblings, 1 reply; 6+ messages in thread
From: sanoj @ 2011-01-27 5:02 UTC (permalink / raw)
To: kernelnewbies
Hello,
I did not find any support for scrubbing in lvm, I would like to know id
this is right and the reason if so
I see 2 reasons => performance overhead
=> demerits of scrubbing when silent data corruption
and disk failure simultaneously ocurrs.
thanks,
sanoj
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* scrubbing in linux volume manager
2011-01-27 5:02 scrubbing in linux volume manager sanoj
@ 2011-01-27 23:32 ` Greg Freemyer
2011-01-28 0:55 ` Manish Katiyar
0 siblings, 1 reply; 6+ messages in thread
From: Greg Freemyer @ 2011-01-27 23:32 UTC (permalink / raw)
To: kernelnewbies
On Thu, Jan 27, 2011 at 12:02 AM, sanoj <k.u.sanoj@gmail.com> wrote:
> Hello,
> I did not find any support for scrubbing in lvm, I would like to know id
> this is right and the reason if so
> I see 2 reasons => performance overhead
> ? ? ? ? ? ? ? ? ? ? ?? => demerits of scrubbing when silent data corruption
> and disk failure simultaneously ocurrs.
>
>
> thanks,
> sanoj
What's "scrubbing"?
^ permalink raw reply [flat|nested] 6+ messages in thread
* scrubbing in linux volume manager
2011-01-27 23:32 ` Greg Freemyer
@ 2011-01-28 0:55 ` Manish Katiyar
2011-01-28 4:53 ` SandeepKsinha
0 siblings, 1 reply; 6+ messages in thread
From: Manish Katiyar @ 2011-01-28 0:55 UTC (permalink / raw)
To: kernelnewbies
On Thu, Jan 27, 2011 at 3:32 PM, Greg Freemyer <greg.freemyer@gmail.com> wrote:
> On Thu, Jan 27, 2011 at 12:02 AM, sanoj <k.u.sanoj@gmail.com> wrote:
>> Hello,
>> I did not find any support for scrubbing in lvm, I would like to know id
>> this is right and the reason if so
>> I see 2 reasons => performance overhead
>> ? ? ? ? ? ? ? ? ? ? ?? => demerits of scrubbing when silent data corruption
>> and disk failure simultaneously ocurrs.
>>
>>
>> thanks,
>> sanoj
>
> What's "scrubbing"?
I think he meant regular "disk scrubbing" to zero out the contents.
--
Thanks -
Manish
^ permalink raw reply [flat|nested] 6+ messages in thread
* scrubbing in linux volume manager
2011-01-28 0:55 ` Manish Katiyar
@ 2011-01-28 4:53 ` SandeepKsinha
2011-01-28 8:48 ` sanoj
0 siblings, 1 reply; 6+ messages in thread
From: SandeepKsinha @ 2011-01-28 4:53 UTC (permalink / raw)
To: kernelnewbies
On Fri, Jan 28, 2011 at 6:25 AM, Manish Katiyar <mkatiyar@gmail.com> wrote:
> On Thu, Jan 27, 2011 at 3:32 PM, Greg Freemyer <greg.freemyer@gmail.com> wrote:
>> On Thu, Jan 27, 2011 at 12:02 AM, sanoj <k.u.sanoj@gmail.com> wrote:
>>> Hello,
>>> I did not find any support for scrubbing in lvm, I would like to know id
>>> this is right and the reason if so
>>> I see 2 reasons => performance overhead
>>> ? ? ? ? ? ? ? ? ? ? ?? => demerits of scrubbing when silent data corruption
>>> and disk failure simultaneously ocurrs.
>>>
>>>
>>> thanks,
>>> sanoj
>>
>> What's "scrubbing"?
>
> I think he meant regular "disk scrubbing" to zero out the contents.
>
Disk Scrubbing typically refers to the verification of disk drives
against media errors.
> --
> Thanks -
> Manish
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
--
Regards,
Sandeep.
?To learn is to change. Education is a process that changes the learner.?
^ permalink raw reply [flat|nested] 6+ messages in thread
* scrubbing in linux volume manager
2011-01-28 4:53 ` SandeepKsinha
@ 2011-01-28 8:48 ` sanoj
2011-01-29 4:34 ` Greg Freemyer
0 siblings, 1 reply; 6+ messages in thread
From: sanoj @ 2011-01-28 8:48 UTC (permalink / raw)
To: kernelnewbies
On Fri, Jan 28, 2011 at 10:23 AM, SandeepKsinha <sandeepksinha@gmail.com>wrote:
>
> >>
> >> What's "scrubbing"?
> >
> > I think he meant regular "disk scrubbing" to zero out the contents.
> >
>
> >Disk Scrubbing typically refers to the verification of disk drives
> against media errors.
>
>
hello,
I referred to scrubbing which is used in RAID 4 / 5, which is used for
recovery of corrupted sectors in a stripe.
thanks,
sanoj
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* scrubbing in linux volume manager
2011-01-28 8:48 ` sanoj
@ 2011-01-29 4:34 ` Greg Freemyer
0 siblings, 0 replies; 6+ messages in thread
From: Greg Freemyer @ 2011-01-29 4:34 UTC (permalink / raw)
To: kernelnewbies
On Fri, Jan 28, 2011 at 3:48 AM, sanoj <k.u.sanoj@gmail.com> wrote:
>
>
> On Fri, Jan 28, 2011 at 10:23 AM, SandeepKsinha <sandeepksinha@gmail.com>
> wrote:
>>
>> >>
>> >> What's "scrubbing"?
>> >
>> > I think he meant regular "disk scrubbing" to zero out the contents.
>> >
>>
>> >Disk Scrubbing typically refers to the verification of disk drives
>> against media errors.
>>
>
>
>
>
> hello,
>
> I referred to scrubbing which is used in RAID 4 / 5, which is used for
> recovery of corrupted sectors in a stripe.
>
> thanks,
> sanoj
It's news to me that LVM (device mapper) supports raid4/5 at all. So
I'm not surprised it doesn't support raid error scrubbing.
MD does support raid4 and raid5. It also supports scrubbing. (I
don't think they call it scrubbing. man mdadm should help you.)
LVM (device mapper) does offer raid1 support and in theory could
support scrubbing for that, but my guess is that raid support in
device mapper is just very immature and it has no real reason for not
being supported.
Greg
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-01-29 4:34 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2011-01-27 5:02 scrubbing in linux volume manager sanoj
2011-01-27 23:32 ` Greg Freemyer
2011-01-28 0:55 ` Manish Katiyar
2011-01-28 4:53 ` SandeepKsinha
2011-01-28 8:48 ` sanoj
2011-01-29 4:34 ` Greg Freemyer
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