On 31/12/11 23:48, Milko Krachounov wrote:
> So, is btrfsck going to be released by the end of 2011?
Doesn't seem so...
What is the next big date?
Debian 7 will probably be `frozen' within the next few months - if
btrfsck is available in time, maybe they will be able to offer btrfs as
a defaul
These are the btrfs-tools versions on Debian:
squeeze:
kernel: 2.6.32
tools: 0.19+20100601-3
squeeze-backports:
kernel: 2.6.39
tools: nothing (so user ends up with 0.19+20100601-3)
wheezy/testing/sid:
kernel: 3.1.6-1
tools: 0.19+2005-2
Using the 2.6.39 kernel from squeeze-backports, do I
>
> Note that you really want to be running the latest kernel possible if
> using btrfs; since 2.6.39 there have been several major performance
> fixes, stability fixes, crash-corruption fixes, which users did hit on
> a somewhat regular basis. Btrfs is not yet stable for the typical
> user who
>It's actually not possible in general. Since it's possible to have
> different bits of the FS (data vs metadata) with different replication
> levels, one byte written to the FS could take up either 1 or 2 bytes
> of raw disk storage, and there's no way of predicting what the overall
> usage w
>> I am looking at what metrics are needed to monitor btrfs in production.
>> I actually look after the ganglia-modules-linux package, which includes
>> some FS space metrics, but I figured that btrfs throws all that out the
>> window.
>>
>> Can you suggest metrics that would be meaningful, do I
>
> From there on, one could potentially create a matrix: (proportional
> font art, apologies):
>
> | subvol1 | subvol2 | subvol3 |
> --+--+--+--+
> subvol1 | 200M | 20M | 50M |
> --+--+--+--+
> subvol2
I had a system that experienced a kernel panic and after rebooting, one
of the btrfs filesystems doesn't mount on the first attempt
The filesystem does mount if I run the mount command manually in the
emergency shell
The following messages appear in the kernel log:
BTRFS critical (device sdc1)
There are two large disks, part of the disks partitioned for MD RAID1
and the rest of the disks partitioned for BtrFs RAID1
One of the disks (/dev/sdd) appears to have failed, there were plenty of
alerts from MD (including dmesg and emails) but nothing from the BtrFs
filesystem
Could this just
On 05/01/12 11:09, Daniel Pocock wrote:
>
>>
>> From there on, one could potentially create a matrix: (proportional
>> font art, apologies):
>>
>> | subvol1 | subvol2 | subvol3 |
>> --+--+--+--+
>&
Hi all,
The FAQ has a couple of sections on encryption (general and dm-crypt)
One thing that isn't explained there: if you create multiple encrypted
volumes (e.g. using dm-crypt) and use Btrfs to combine them into RAID1,
how does error recovery work when a read operation returns corrupted data?
There is various information about
- enterprise-class drives (either SAS or just enterprise SATA)
- the SCSI/SAS protocols themselves vs SATA
having more advanced features (e.g. for dealing with error conditions)
than the average block device
For example, Adaptec recommends that such drives will
>> - if a non-RAID SAS card is used, does it matter which card is chosen?
>> Does btrfs work equally well with all of them?
>
> If you're using btrfs RAID, you need a HBA, not a RAID card. If the RAID
> card can work as a HBA (usually labelled as JBOD mode) then you're good to
> go.
>
> For ex
I notice this question on the wiki/faq:
https://btrfs.wiki.kernel.org/index.php/UseCases#What_is_best_practice_when_partitioning_a_device_that_holds_one_or_more_btr-filesystems
and as it hasn't been answered, can anyone make any comments on the subject
Various things come to mind:
a) partiti
On 12/08/12 22:48, Fajar A. Nugraha wrote:
> On Sun, Aug 12, 2012 at 11:46 PM, Daniel Pocock wrote:
>>
>>
>> I notice this question on the wiki/faq:
>>
>>
>> https://btrfs.wiki.kernel.org/index.php/UseCases#What_is_best_practice_when_partitioning_a_device
I created a 1TB RAID1. So far it is just for testing, no important data
on there.
After a reboot, I tried to mount it again
# mount /dev/mapper/vg00-btrfsvol0_0 /mnt/btrfs0
mount: wrong fs type, bad option, bad superblock on
/dev/mapper/vg00-btrfsvol0_0,
missing codepage or helper prog
On 19/08/12 14:15, Hugo Mills wrote:
> On Sun, Aug 19, 2012 at 02:08:17PM +0000, Daniel Pocock wrote:
>>
>>
>> I created a 1TB RAID1. So far it is just for testing, no important data
>> on there.
>>
>>
>> After a reboot, I tried to mount it again
&g
On 19/08/12 16:51, Hugo Mills wrote:
> On Sun, Aug 19, 2012 at 02:33:14PM +0000, Daniel Pocock wrote:
>> On 19/08/12 14:15, Hugo Mills wrote:
>>> On Sun, Aug 19, 2012 at 02:08:17PM +0000, Daniel Pocock wrote:
>>>> I created a 1TB RAID1. So far it is just for test
On 19/08/12 18:02, Daniel Pocock wrote:
>
>
> On 19/08/12 16:51, Hugo Mills wrote:
>> On Sun, Aug 19, 2012 at 02:33:14PM +, Daniel Pocock wrote:
>>> On 19/08/12 14:15, Hugo Mills wrote:
>>>> On Sun, Aug 19, 2012 at 02:08:17PM +, Daniel Pocock wrote:
It is well documented that btrfs data recovery (after silent corruption)
is dependent on the use of btrfs's own RAID1.
However, I'm curious about whether any hardware RAID vendors are
contemplating ways to integrate more closely with btrfs, for example,
such that when btrfs detects a bad checks
cksum' to refer to a
parity bit
On 22/08/12 13:05, Daniel Pocock wrote:
>
>
>
> It is well documented that btrfs data recovery (after silent corruption)
> is dependent on the use of btrfs's own RAID1.
>
> However, I'm curious about whether any hardware RAID ve
On 22/08/12 17:42, David Sterba wrote:
> On Tue, Aug 14, 2012 at 07:23:48AM -0400, Calvin Walton wrote:
>> A patch to add support for `btrfs fi defrag -c none ` or so would
>> make this easier, and shouldn't be to hard to do :)
>
> This one is on my list of 'nice to have', it's needed to extend
I've been able to run the Debian 7 installer (beta1) and get a working
Debian system on btrfs RAID1 root FS.
A few manual steps and patches required - it would be useful to get
feedback about this process. I might have a go at patching partman to
fully support this through the installer menu.
I just did a search and couldn't find any probe for btrfs RAID status
The "check_raid" plugin seems to recognise mdadm and various other types
of RAID but not btrfs
Has anybody seen a plugin for Nagios or could anybody comment on how it
should work if somebody wants to make one?
For example, wo
On 23/11/13 04:59, Anand Jain wrote:
>
>
>> For example, would the command
>>
>> btrfs filesystem show --all-devices
>>
>> give a non-zero error status or some other clue if any of the devices
>> are at risk?
>
> No there isn't any good way as of now. that's something to fix.
Does it re
On 23/11/13 09:37, Daniel Pocock wrote:
>
>
> On 23/11/13 04:59, Anand Jain wrote:
>>
>>
>>> For example, would the command
>>>
>>> btrfs filesystem show --all-devices
>>>
>>> give a non-zero error status or some other clu
On 23/11/13 11:35, Duncan wrote:
> Daniel Pocock posted on Sat, 23 Nov 2013 09:37:50 +0100 as excerpted:
>
>> What about when btrfs detects a bad block checksum and recovers data
>> from the equivalent block on another disk? The wiki says there will be
>> a syslog eve
Hi,
Can anybody comment on how BtrFs (particularly RAID1 mirroring)
interacts with drives that offer error recovery control (or TLER in WDC
terms)?
I generally prefer to buy this type of drive for any serious data
storage purposes
I notice ZFS gets a mention in the Wikipedia article about the
I've got a RAID1 on two 1TB partitions, /dev/sda3 and /dev/sdb3
I'm adding two new disks, they will have bigger partitions /dev/sdc3 and
/dev/sdd3
I'd like the BtrFs to migrate from the old partitions to the new ones as
safely and quickly as possible and if it is reasonable to do so, keeping
i
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On 24/01/15 15:36, Hugo Mills wrote:
> On Sat, Jan 24, 2015 at 03:32:44PM +0100, Daniel Pocock wrote:
>>
>>
>>
>> I've got a RAID1 on two 1TB partitions, /dev/sda3 and /dev/sdb3
>>
>> I'm addin
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