Am Mon, 08 Feb 2016 20:47:10 -0800
schrieb Nikolaus Rath <Nikolaus@xxxxxxxx>:
> Hello,
>
> If I'm understanding Documentation/bcache.txt correctly, I should be
> able to use one SSD to cache multiple spinning disks.
>
> However, I'm at a loss of how to set this up in practice. I believe I
> need to do
>
> make-bcache -B /dev/sda # spinning rust
> make-bcache -B /dev/sdb # spinning rust
> make-bcache -C /dev/sdc # ssd
>
> and then something like
>
> echo <CSET-UUID> > /sys/block/bcacheX/bcache/attach
>
>
> But what do I have to put for X, and what for CSET-UUID? I believe for
> at least one of those values I will have two options (because there
> are two backing devices).
Create it in one go:
make-bcache -C /dev/sdc -B /dev/sd{a,b}
It will take away the hassle. Everything should be setup now.
But if you want to do it manually: you have to run "echo" twice - for
each X (the backing devices). CSET-UUID comes from /sys/fs/bcache where
you will find a UUID per each bcache caching device, which is just one
for your case.
--
Regards,
Kai
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