Bob Williams posted on Thu, 11 Sep 2014 10:56:14 +0100 as excerpted:
> So if a RAID1/two disk system uses the disks symmetrically, why did my
> balance command take 22 hours? That's what puzzles me, as my
> understanding of RAID1 is that the disk use *is* symmetrical.
What you're missing is what
On 10/09/14 19:43, Goffredo Baroncelli wrote:
> On 09/10/2014 02:27 PM, Bob Williams wrote:
>> I have two 2TB disks formatted as a btrfs raid1 array, mirroring both
>> data and metadata. Last night I started
>>
>> # btrfs filesystem balance
>
>
> May be that I am missing something obvious, howev
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On 11/09/14 05:30, Zygo Blaxell wrote:
> On Wed, Sep 10, 2014 at 01:27:36PM +0100, Bob Williams wrote:
>> I have two 2TB disks formatted as a btrfs raid1 array, mirroring
>> both data and metadata. Last night I started
>>
>> # btrfs filesystem balance
Zygo Blaxell posted on Wed, 10 Sep 2014 23:51:19 -0400 as excerpted:
> Spinning disks stop being able to position their heads properly around
> -10C or so, a fact that will be familiar to anyone who's tried to use a
> laptop outside in winter.
Depends on where that winter is. Here in Phoenix, sn
On Wed, Sep 10, 2014 at 01:27:36PM +0100, Bob Williams wrote:
> I have two 2TB disks formatted as a btrfs raid1 array, mirroring both
> data and metadata. Last night I started
>
> # btrfs filesystem balance
>
> and it is still running 18 hours later. This suggests that most stuff
> only gets wri
On Wed, Sep 10, 2014 at 11:51:19PM -0400, Zygo Blaxell wrote:
> This is a complex topic.
I agree, and I make no claim to be an expert in any of this.
> Some disks have bugs in their firmware, and some of those bugs make the
> data sheets and most of this discussion entirely moot. The firmware i
On Wed, Sep 10, 2014 at 09:25:17PM -0400, Sean Greenslade wrote:
> On Thu, Sep 11, 2014 at 12:28:56AM +0200, Goffredo Baroncelli wrote:
> > The WD datasheet says something different. It reports "Non-recoverable
> > read errors per bits read" less than 1/10^14. They express the number of
> > error
On Thu, Sep 11, 2014 at 12:28:56AM +0200, Goffredo Baroncelli wrote:
> The WD datasheet says something different. It reports "Non-recoverable
> read errors per bits read" less than 1/10^14. They express the number of
> error in terms of number of bit reading.
>
> You instead are saying that the
On 09/10/2014 09:32 PM, Sean Greenslade wrote:
> On Wed, Sep 10, 2014 at 08:43:25PM +0200, Goffredo Baroncelli wrote:
>> May be that I am missing something obvious, however I have to ask which
>> would be the purpose to balance a two disks RAID1 system.
>> The balance command should move the data
On Wed, Sep 10, 2014 at 08:43:25PM +0200, Goffredo Baroncelli wrote:
> May be that I am missing something obvious, however I have to ask which
> would be the purpose to balance a two disks RAID1 system.
> The balance command should move the data between the disks in order to
> avoid some disk full
On 09/10/2014 02:27 PM, Bob Williams wrote:
> I have two 2TB disks formatted as a btrfs raid1 array, mirroring both
> data and metadata. Last night I started
>
> # btrfs filesystem balance
May be that I am missing something obvious, however I have to ask which
would be the purpose to balance a
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On 10/09/14 14:06, Austin S Hemmelgarn wrote:
> On 2014-09-10 08:27, Bob Williams wrote:
>> I have two 2TB disks formatted as a btrfs raid1 array, mirroring
>> both data and metadata. Last night I started
>>
>> # btrfs filesystem balance
>>
> In gen
On 2014-09-10 09:48, Rich Freeman wrote:
> On Wed, Sep 10, 2014 at 9:06 AM, Austin S Hemmelgarn
> wrote:
>> Normally, you shouldn't need to run balance at all on most BTRFS
>> filesystems, unless your usage patterns vary widely over time (I'm
>> actually a good example of this, most of the files i
On Wed, Sep 10, 2014 at 9:06 AM, Austin S Hemmelgarn
wrote:
> Normally, you shouldn't need to run balance at all on most BTRFS
> filesystems, unless your usage patterns vary widely over time (I'm
> actually a good example of this, most of the files in my home directory
> are relatively small, exce
On 2014-09-10 08:27, Bob Williams wrote:
> I have two 2TB disks formatted as a btrfs raid1 array, mirroring both
> data and metadata. Last night I started
>
> # btrfs filesystem balance
>
In general, unless things are really bad, you don't ever want to use
balance on such a big filesystem withou
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I have two 2TB disks formatted as a btrfs raid1 array, mirroring both
data and metadata. Last night I started
# btrfs filesystem balance
and it is still running 18 hours later. This suggests that most stuff
only gets written to one physical device,
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