About physically swapping backing and cache device

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Hello,


I have been using bcache for some months. Now I am with 3.12.6 kernel
(stable! :)
Thanks and congratulations for the good work.

I have in the laptop this configuration:

/dev/sda7 as backing device (hard drive partition)
/dev/sdb as cache device (SSD)

1) I would like to physically swap sda and sdb (a matter of different
bus speeds) in order to improve ata speed for SSD. The fact is that in
a case of this, would I have to "reregister" anything in bcache, or it
will run referenced to UUIDs and so?

2) I think I would have to install GRUB into /dev/sdb (it has no
partitions defined). Would it be safe installing GRUB in a cache
device? Future configuration would be /dev/sda for the cache (SSD) and
/dev/sdb for the backing device (hard drive).



-- 
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Salutacions...Josep
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