an be used
and which does providde an overwrite/wipe guarantee. Maybe ATA has
something equivalent to
WRITESAME10/16.
I just want to say: be careful, sometimes these commands do not
provide a guarantee that they will actually
make the data overwritten/unretrievable.
ronnie sahlberg
On Thu, Dec 6,
I think it is just a matter of lack of resources.
The very few paid resources to work on btrfs probably does not have
priority to work on parity raid.
(And honestly, parity raid is probably much better implemented below
the filesystem in any case, i.e. in say the md driver or the array
itself).
Al
On Thu, Apr 13, 2017 at 8:47 PM, Duncan <1i5t5.dun...@cox.net> wrote:
> Ank Ular posted on Thu, 13 Apr 2017 14:49:41 -0400 as excerpted:
...
> OK, I'm one of the ones that's going to "go off" on you, but FWIW, I
> expect pretty much everyone else would pretty much agree. At least you
> do have bac
On Thu, Oct 20, 2016 at 7:44 AM, Austin S. Hemmelgarn
wrote:
> On 2016-10-20 09:47, Timofey Titovets wrote:
>>
>> 2016-10-20 15:09 GMT+03:00 Austin S. Hemmelgarn :
>>>
>>> On 2016-10-20 05:29, Timofey Titovets wrote:
Hi, i use btrfs for NFS VM replica storage and for NFS shared VM
>
On Tue, Oct 11, 2016 at 8:14 AM, Philip Louis Moetteli
wrote:
>
> Hello,
>
>
> I have to build a RAID 6 with the following 3 requirements:
You should under no circumstances use RAID5/6 for anything other than
test and throw-away data.
It has several known issues that will eat your data. Total da
On Sat, Jun 25, 2016 at 7:53 PM, Duncan <1i5t5.dun...@cox.net> wrote:
> Chris Murphy posted on Sat, 25 Jun 2016 11:25:05 -0600 as excerpted:
>
>> Wow. So it sees the data strip corruption, uses good parity on disk to
>> fix it, writes the fix to disk, recomputes parity for some reason but
>> does i
What I would do in this situation :
1, Immediately stop writing to these disks/filesystem. ONLY access it
in read-only mode until you have salvaged what can be salvaged.
2, get a new 5T UDB drive (they are cheap) and copy file by file off the array.
3, when you hit files that cause panics, make a
On Thu, Dec 31, 2015 at 5:27 PM, Chris Murphy wrote:
> On Thu, Dec 31, 2015 at 6:09 PM, ronnie sahlberg
> wrote:
>> Here is a kludge I hacked up.
>> Someone that cares could clean this up and start building a proper
>> test suite or something.
>>
>> Thi
On Thu, Dec 31, 2015 at 5:27 PM, Chris Murphy wrote:
> On Thu, Dec 31, 2015 at 6:09 PM, ronnie sahlberg
> wrote:
>> Here is a kludge I hacked up.
>> Someone that cares could clean this up and start building a proper
>> test suite or something.
>>
>> Thi
loop.
It is fairly trivial to trigger dataloss when devices are bounced like this.
You have to run the script as root due to the calls to [u]mount and iscsiadm
On Thu, Dec 31, 2015 at 1:23 PM, ronnie sahlberg
wrote:
> On Thu, Dec 31, 2015 at 12:11 PM, Chris Murphy
> wrote:
>> This
On Thu, Dec 31, 2015 at 12:11 PM, Chris Murphy wrote:
> This is a torture test, no data is at risk.
>
> Two devices, btrfs raid1 with some stuff on them.
> Copy from that array, elsewhere.
> During copy, yank the active device.
>
> dmesg shows many of these:
>
> [ 7179.373245] BTRFS error (device
That does not look good.
See if you can find something in the samba logs on the server.
Look for messages about long running VFS operations and/or client
disconnecting wile a file is open for writing.
The CIFS/SMB protocol has hard real-time requirements in the windows
client redirector which le
Maybe hold off erasing the drives a little in case someone wants to
collect some extra data for diagnosing how/why the filesystem got into
this unrecoverable state.
A single device having issues should not cause the whole filesystem to
become unrecoverable.
On Wed, Oct 21, 2015 at 9:09 AM, Janos
If it is for mostly archival storage, I would suggest you take a look
at snapraid.
On Wed, Oct 21, 2015 at 9:09 AM, Janos Toth F. wrote:
> I went through all the recovery options I could find (starting from
> read-only to "extraordinarily dangerous"). Nothing seemed to work.
>
> A Windows based
On Mon, Dec 22, 2014 at 2:52 PM, Robert White wrote:
> On 12/22/2014 12:44 PM, Austin S Hemmelgarn wrote:
>>
>> On 2014-12-22 15:06, Richard Sharpe wrote:
>>>
>>> On Mon, Dec 22, 2014 at 10:43 AM, Chris Murphy
>>> wrote:
On Mon, Dec 22, 2014 at 11:09 AM, Austin S Hemmelgarn
wrote:
On Tue, Aug 5, 2014 at 5:20 AM, Russell Coker wrote:
>
> Based on what I've read on this list it seems that BTRFS is less stable in
> 3.15 than in 3.14. Even 3.14 isn't something I'd recommend to random people
> who want something to just work.
>
> The Debian installer has BTRFS in a list of fil
look. I am more than happy to add additional
features that would make it even more useful for
filesystem-error-path-and-recovery-testing
regards
ronnie sahlberg
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On Sun, Jul 20, 2014 at 7:48 PM, Duncan <1i5t5.dun...@cox.net> wrote:
> ashford posted on Sun, 20 Jul 2014 12:59:21 -0700 as excerpted:
>
>> If you assume a 12ms average seek time (normal for 7200RPM SATA drives),
>> an 8.3ms rotational latency (half a rotation), an average 64kb write and
>> a 100M
On Fri, Jun 27, 2014 at 1:40 PM, Marc MERLIN wrote:
> On Fri, Jun 27, 2014 at 11:50:09AM -0700, Marc MERLIN wrote:
>> My laptop deadlocked some more times (everything works until it needs to
>> touch the filesystem, and then it's deadlocked).
>> Unfortunately, I can trigger sysrq, but it doesn't g
for linux.
regards
ronnie sahlberg
On Fri, Jun 27, 2014 at 8:44 AM, Zhe Zhang wrote:
> Hi,
>
> I setup 2 Linux servers to share the same device through iSCSI. Then I
> created a btrfs on the device. Then I saw the problem that the 2 Linux
> servers do not see a consistent file
start-btrfs-dmcrypt :
...
echo "$pwd" |
...
Hmmm. This makes the plaintext password visible in ps output.
It is probably better to pass this in by redirecting a file to stdin.
On Mon, May 5, 2014 at 2:25 PM, Marc MERLIN wrote:
> On Mon, May 05, 2014 at 10:51:46PM +0200, john terragon wrote:
>>
On Fri, Apr 25, 2014 at 8:20 AM, Marc MERLIN wrote:
> On Fri, Apr 25, 2014 at 04:47:04PM +0200, David Sterba wrote:
>> On Thu, Apr 24, 2014 at 04:14:56PM -0700, Marc MERLIN wrote:
>> > > > Netgear uses BTRFS as the filesystem in their refreshed ReadyNAS line.
>> > > > They apparently use Oracle's
On Sun, Mar 16, 2014 at 4:17 PM, Marc MERLIN wrote:
> On Sun, Mar 16, 2014 at 05:12:10PM -0600, Chris Murphy wrote:
>>
>> On Mar 16, 2014, at 4:55 PM, Chris Murphy wrote:
>>
>> > Then use btrfs replace start.
>>
>> Looks like in 3.14rc6 replace isn't yet supported. I get "dev_replace cannot
>> y
On Mon, Feb 10, 2014 at 7:13 PM, cwillu wrote:
> On Mon, Feb 10, 2014 at 7:02 PM, Roger Binns wrote:
>> -BEGIN PGP SIGNED MESSAGE-
>> Hash: SHA1
>>
>> On 10/02/14 10:24, cwillu wrote:
>>> The regular df data used number should be the amount of space required
>>> to hold a backup of that c
On Wed, Jan 22, 2014 at 1:16 PM, Chris Mason wrote:
> On Wed, 2014-01-22 at 13:06 -0800, ronnie sahlberg wrote:
>> On Wed, Jan 22, 2014 at 12:45 PM, Chris Mason wrote:
>> > On Tue, 2014-01-21 at 17:08 +, Duncan wrote:
>> >> Graham Fleming posted on Tue,
On Wed, Jan 22, 2014 at 12:45 PM, Chris Mason wrote:
> On Tue, 2014-01-21 at 17:08 +, Duncan wrote:
>> Graham Fleming posted on Tue, 21 Jan 2014 01:06:37 -0800 as excerpted:
>>
>> > Thanks for all the info guys.
>> >
>> > I ran some tests on the latest 3.12.8 kernel. I set up 3 1GB files and
>
Similar things happened to me. (See my unanswered posts ~1Sep, this fs
is not really ready for production I think)
When you get wrong transid errors and reports that you have checksums
being repaired,
that is all bad news and no one can help you.
Unfortunately there are, I think, no real tools to
This is great stuff.
Now, how can we get this into btrfs and md?
On Wed, Nov 20, 2013 at 1:23 PM, Andrea Mazzoleni wrote:
> Hi,
>
>> First, create a 3 by 6 cauchy matrix, using x_i = 2^-i, and y_i = 0 for i=0,
>> and y_i = 2^i for other i.
>> In this case: x = { 1, 142, 71, 173, 216, 108 } y
For crc32c you can use this one which is lgpl:
https://github.com/sahlberg/libiscsi/blob/master/lib/crc32c.c
You can use the generator at :
http://www.ross.net/crc/download/crc_v3.txt
to generate this (and others)
On Mon, Sep 9, 2013 at 3:50 PM, David Sterba wrote:
> On Mon, Sep 09, 2013 at 0
v/sde
eventually fails with :
btrfs-zero-log: ctree.c:342: __btrfs_cow_block: Assertion
`!(btrfs_header_generation(buf) > trans->transid)' failed.
Aborted
What should I try next?
regards
ronnie sahlberg
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ually does complete the filesystem remains unmountable.
Any advice ?
regards
ronnie sahlberg
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irrored onto all the
spindles in the filesystem, not just 2 in RAID1 or n in RAID6.
Im running a 3.8.0 kernel.
regards
ronnie sahlberg
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