Information request

Information request

[o1bigtenor]

Greetings


I managed to delete a file that would require a lot of hours to replace.
(I would be entering all the information again.)

The file is located on a Raid 10 array set up using mdadm - v4.1 - 2018-10-01.
Am running Debian Bullseye (testing).

Looking for suggestions on how to recover the file.

Not sure what other data might be required for anyone assisting so if
more information is required - - please indicate.

TIA

Re: Information request

[Andy Smith]

Hello,

On Mon, Nov 16, 2020 at 08:43:12PM -0600, o1bigtenor wrote:
> I managed to delete a file that would require a lot of hours to replace.

[…]

> Looking for suggestions on how to recover the file.

This is really a filesystem question - files are not something that
RAID concerns itself with. So, what filesystem and what type of
file? You might get lucky running photorec (it's not just for
images) on the block device while it's unmounted.

    https://www.cgsecurity.org/wiki/PhotoRec_Step_By_Step

Cheers,
Andy

Re: Information request

[o1bigtenor]

On Mon, Nov 16, 2020 at 10:43 PM Andy Smith <andy@strugglers.net> wrote:
>
> Hello,
>
> On Mon, Nov 16, 2020 at 08:43:12PM -0600, o1bigtenor wrote:
> > I managed to delete a file that would require a lot of hours to replace.
>
> […]
>
> > Looking for suggestions on how to recover the file.
>
> This is really a filesystem question - files are not something that
> RAID concerns itself with. So, what filesystem and what type of
> file? You might get lucky running photorec (it's not just for
> images) on the block device while it's unmounted.
>
>     https://www.cgsecurity.org/wiki/PhotoRec_Step_By_Step
>

Sorry for the noise folks!

Thanks for the tip Mr Andy - - - - had started that even before I
read your note. Help validate my findings!

Thanking you for your assistance (even if it weren't 100% raid
related - - - grin!).

Regards

Information Request

[Matias Seco]

Greetings,
i found very interesting about testing this filesystem. Unfortunately
i got late with my project, because i couldn't find useful resources
from google for reiser4,
mainly because the reiser4's kernel Wiki was down due to maintenaince.
After time, i saw that the page still didn't return: this is why i
would like to ask you, if you can point me resources, to understand
how to configure the reiser4 on my HDD.

Salut, Matias

Re: Information Request

[Dušan Čolić]

Hello,

You can find enough informations in a FAQ I made for Gentoo
http://forums.gentoo.org/viewtopic-p-5200706.html#5200706

Have fun

Dushan

On Mon, Oct 24, 2011 at 2:10 PM, Matias Seco <matias.jose.seco@gmail.com> wrote:
> Greetings,
> i found very interesting about testing this filesystem. Unfortunately
> i got late with my project, because i couldn't find useful resources
> from google for reiser4,
> mainly because the reiser4's kernel Wiki was down due to maintenaince.
> After time, i saw that the page still didn't return: this is why i
> would like to ask you, if you can point me resources, to understand
> how to configure the reiser4 on my HDD.
>
> Salut, Matias
> --
> To unsubscribe from this list: send the line "unsubscribe reiserfs-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
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Re: Information Request

[Edward Shishkin]

If you need reiser4 patches against some vanilla kernel, send me a
request.

NOTE: reiser4 is prone to crash under high workload because of
old bug, which is not yet fixed. Fsck copes with corruptions
caused by this bug (appearing objects with inconsistent key order),
however, this makes reiser4 improper for using in production
systems (file servers, etc.)

Thanks,
Edward.


On 10/24/2011 02:17 PM, Dušan Čolić wrote:
> Hello,
>
> You can find enough informations in a FAQ I made for Gentoo
> http://forums.gentoo.org/viewtopic-p-5200706.html#5200706
>
> Have fun
>
> Dushan
>
> On Mon, Oct 24, 2011 at 2:10 PM, Matias Seco<matias.jose.seco@gmail.com>  wrote:
>> Greetings,
>> i found very interesting about testing this filesystem. Unfortunately
>> i got late with my project, because i couldn't find useful resources
>> from google for reiser4,
>> mainly because the reiser4's kernel Wiki was down due to maintenaince.
>> After time, i saw that the page still didn't return: this is why i
>> would like to ask you, if you can point me resources, to understand
>> how to configure the reiser4 on my HDD.
>>
>> Salut, Matias
>> --
>> To unsubscribe from this list: send the line "unsubscribe reiserfs-devel" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
> --
> To unsubscribe from this list: send the line "unsubscribe reiserfs-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

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Re: Information Request

[Dušan Čolić]

Hello

2011/10/24 Edward Shishkin <edward.shishkin@gmail.com>:
> If you need reiser4 patches against some vanilla kernel, send me a
> request.
>
> NOTE: reiser4 is prone to crash under high workload because of
> old bug, which is not yet fixed. Fsck copes with corruptions
> caused by this bug (appearing objects with inconsistent key order),
> however, this makes reiser4 improper for using in production
> systems (file servers, etc.)
>
Could we get a list of confirmed bugs for latest R4, so that we know
its limitations and to avoid dangerous use cases.
Will kernel.org place for patches be back?
Can we get 3.0 patch and pitfall list :) ?
From all the FSes I try I still get the best data safety and response
time with R4, even in this state :)


Thanks

Dusan


> Thanks,
> Edward.
>
>
> On 10/24/2011 02:17 PM, Dušan Čolić wrote:
>>
>> Hello,
>>
>> You can find enough informations in a FAQ I made for Gentoo
>> http://forums.gentoo.org/viewtopic-p-5200706.html#5200706
>>
>> Have fun
>>
>> Dushan
>>
>> On Mon, Oct 24, 2011 at 2:10 PM, Matias Seco<matias.jose.seco@gmail.com>
>>  wrote:
>>>
>>> Greetings,
>>> i found very interesting about testing this filesystem. Unfortunately
>>> i got late with my project, because i couldn't find useful resources
>>> from google for reiser4,
>>> mainly because the reiser4's kernel Wiki was down due to maintenaince.
>>> After time, i saw that the page still didn't return: this is why i
>>> would like to ask you, if you can point me resources, to understand
>>> how to configure the reiser4 on my HDD.
>>>
>>> Salut, Matias
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe reiserfs-devel"
>>> in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe reiserfs-devel"
>> in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
>
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Re: Information Request

[Edward Shishkin]

On 10/25/2011 09:55 AM, Dušan Čolić wrote:
> Hello
>
> 2011/10/24 Edward Shishkin<edward.shishkin@gmail.com>:
>> If you need reiser4 patches against some vanilla kernel, send me a
>> request.
>>
>> NOTE: reiser4 is prone to crash under high workload because of
>> old bug, which is not yet fixed. Fsck copes with corruptions
>> caused by this bug (appearing objects with inconsistent key order),
>> however, this makes reiser4 improper for using in production
>> systems (file servers, etc.)
>>
> Could we get a list of confirmed bugs for latest R4,


All bugreports are resolved to only one bug.

The shit is in balancing code I didn't touch. The order of
keys gets inconsistent at TWIG level while handling secondary
COP_INSERT requests generated by new node insertions on LEAF
level.

And the broken order propagates to upper levels because of
delimiting keys assignment policy. As a result some objects
can not be found with the following kernel complaints about
inconsistent key order.


  so that we know
> its limitations and to avoid dangerous use cases.


You need to make sure you can easily fsck your reiser4 partition
at any time. So if you have root on reiser4, you also need to have
a rescue CD with reiser4 support, etc. Also for this reason try to
avoid too large partitions.


> Will kernel.org place for patches be back?


It is rather painful to follow their paranoid instructions.
I think to consider sourceforge.net as a such place (not sure
for now).


> Can we get 3.0 patch and pitfall list :) ?


I have a patch for .39. It also should work for 3.0
If you need this one, then send me a request.

Thanks,
Edward.
P.S. I'll be unreachable from Oct 26 to Nov 07.



>  From all the FSes I try I still get the best data safety and response
> time with R4, even in this state :)
>
>
> Thanks
>
> Dusan
>
>
>> Thanks,
>> Edward.
>>
>>
>> On 10/24/2011 02:17 PM, Dušan Čolić wrote:
>>>
>>> Hello,
>>>
>>> You can find enough informations in a FAQ I made for Gentoo
>>> http://forums.gentoo.org/viewtopic-p-5200706.html#5200706
>>>
>>> Have fun
>>>
>>> Dushan
>>>
>>> On Mon, Oct 24, 2011 at 2:10 PM, Matias Seco<matias.jose.seco@gmail.com>
>>>   wrote:
>>>>
>>>> Greetings,
>>>> i found very interesting about testing this filesystem. Unfortunately
>>>> i got late with my project, because i couldn't find useful resources
>>>> from google for reiser4,
>>>> mainly because the reiser4's kernel Wiki was down due to maintenaince.
>>>> After time, i saw that the page still didn't return: this is why i
>>>> would like to ask you, if you can point me resources, to understand
>>>> how to configure the reiser4 on my HDD.
>>>>
>>>> Salut, Matias
>>>> --
>>>> To unsubscribe from this list: send the line "unsubscribe reiserfs-devel"
>>>> in
>>>> the body of a message to majordomo@vger.kernel.org
>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe reiserfs-devel"
>>> in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
>>

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Re: Information Request

[Dušan Čolić]

> I have a patch for .39. It also should work for 3.0
> If you need this one, then send me a request.
>

.39 patch would be great. But people would probably like 3.0 more. I'm
fine with whichever gives you less trouble to make.

Thanks
Dushan


> Thanks,
> Edward.
> P.S. I'll be unreachable from Oct 26 to Nov 07.
>
>
>
>>  From all the FSes I try I still get the best data safety and response
>> time with R4, even in this state :)
>>
>>
>> Thanks
>>
>> Dusan
>>
>>
>>> Thanks,
>>> Edward.
>>>
>>>
>>> On 10/24/2011 02:17 PM, Dušan Čolić wrote:
>>>>
>>>> Hello,
>>>>
>>>> You can find enough informations in a FAQ I made for Gentoo
>>>> http://forums.gentoo.org/viewtopic-p-5200706.html#5200706
>>>>
>>>> Have fun
>>>>
>>>> Dushan
>>>>
>>>> On Mon, Oct 24, 2011 at 2:10 PM, Matias Seco<matias.jose.seco@gmail.com>
>>>>  wrote:
>>>>>
>>>>> Greetings,
>>>>> i found very interesting about testing this filesystem. Unfortunately
>>>>> i got late with my project, because i couldn't find useful resources
>>>>> from google for reiser4,
>>>>> mainly because the reiser4's kernel Wiki was down due to maintenaince.
>>>>> After time, i saw that the page still didn't return: this is why i
>>>>> would like to ask you, if you can point me resources, to understand
>>>>> how to configure the reiser4 on my HDD.
>>>>>
>>>>> Salut, Matias
>>>>> --
>>>>> To unsubscribe from this list: send the line "unsubscribe
>>>>> reiserfs-devel"
>>>>> in
>>>>> the body of a message to majordomo@vger.kernel.org
>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>
>>>> --
>>>> To unsubscribe from this list: send the line "unsubscribe
>>>> reiserfs-devel"
>>>> in
>>>> the body of a message to majordomo@vger.kernel.org
>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>>>
>
>
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Re: Information Request

[Dušan Čolić]

Hello Edward

Could I get a .39 patch, I have vga_arbiter problems in .37 that
should be solved in that kernel.

Thanks
Dushan

2011/10/26 Dušan Čolić <dusanc@gmail.com>:
>> I have a patch for .39. It also should work for 3.0
>> If you need this one, then send me a request.
>>
>
> .39 patch would be great. But people would probably like 3.0 more. I'm
> fine with whichever gives you less trouble to make.
>
> Thanks
> Dushan
>
>
>> Thanks,
>> Edward.
>> P.S. I'll be unreachable from Oct 26 to Nov 07.
>>
>>
>>
>>>  From all the FSes I try I still get the best data safety and response
>>> time with R4, even in this state :)
>>>
>>>
>>> Thanks
>>>
>>> Dusan
>>>
>>>
>>>> Thanks,
>>>> Edward.
>>>>
>>>>
>>>> On 10/24/2011 02:17 PM, Dušan Čolić wrote:
>>>>>
>>>>> Hello,
>>>>>
>>>>> You can find enough informations in a FAQ I made for Gentoo
>>>>> http://forums.gentoo.org/viewtopic-p-5200706.html#5200706
>>>>>
>>>>> Have fun
>>>>>
>>>>> Dushan
>>>>>
>>>>> On Mon, Oct 24, 2011 at 2:10 PM, Matias Seco<matias.jose.seco@gmail.com>
>>>>>  wrote:
>>>>>>
>>>>>> Greetings,
>>>>>> i found very interesting about testing this filesystem. Unfortunately
>>>>>> i got late with my project, because i couldn't find useful resources
>>>>>> from google for reiser4,
>>>>>> mainly because the reiser4's kernel Wiki was down due to maintenaince.
>>>>>> After time, i saw that the page still didn't return: this is why i
>>>>>> would like to ask you, if you can point me resources, to understand
>>>>>> how to configure the reiser4 on my HDD.
>>>>>>
>>>>>> Salut, Matias
>>>>>> --
>>>>>> To unsubscribe from this list: send the line "unsubscribe
>>>>>> reiserfs-devel"
>>>>>> in
>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>
>>>>> --
>>>>> To unsubscribe from this list: send the line "unsubscribe
>>>>> reiserfs-devel"
>>>>> in
>>>>> the body of a message to majordomo@vger.kernel.org
>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>
>>>>
>>
>>
>
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