Re: bcache using in case of 5 hdd disks

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Hi,

Op 28/01/14 14:56 schreef Thierry De Leeuw <thierry@xxxxxxxxxxxx>:

>The documentation at
>http://evilpiepirate.org/git/linux-bcache.git/plain/Documentation/bcache.t
>xt?h=bcache-dev 
>explains how to do it.
>
>Look at the "Getting started" and "ATTACHING" section.
>
>Bottom line to create one cache (sdc) and 2 backing (sda and sdb)
>devices, use
>
>make-bcache -B /dev/sda /dev/sdb -C /dev/sdc

And (from the same documentation) if you¹ve created (make-bcache) and
registered the caching and backing devices separately, you can attach them
like this:

echo <CSET-UUID> > /sys/block/bcache0/bcache/attach

echo <CSET-UUID> > /sys/block/bcache1/bcache/attach


Assuming that /dev/sda and /dev/sdb have shown up as /dev/bcache0 and
/dev/bcache1 as their bcached counterparts after registering, and
<CSET-UUID> being the UUID of the cache device to be found in
/sys/fs/bcache.

Rolf

>
>
>Best regards
>
>Thierry
>
>
>On 01/28/2014 01:31 PM, Vasiliy Tolstov wrote:
>> 2014-01-28 Rolf Fokkens<rolf@xxxxxxxxxxxxxx>
>>> Op 27/01/14 21:38 schreef Patrick Zwahlen<paz@xxxxxxxxxxx>:
>>>
>>>> My understanding is that a single "cacheset" (in your case, your SSD)
>>>>can
>>>> be
>>>> shared between multiple backing devices.
>>>>
>>>> You should be able to attach a single cacheset's UUID to multiple
>>>>devices.
>>>>
>>>> Can anyone else confirm ?
>>> Yep, confirmed!
>>>
>>> Rolf
>> Can you explain for me how can i do that?
>>
>>
>
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