On 22/11/11 05:31, Justin Rush wrote:
I am running into the same issue with LVM, using the entire raid device, and using a single plain disk... I must be doing something wrong here.
You are.
~ # pvcreate /dev/md127
Physical volume "/dev/md127" successfully created
~ # vgcreate vg_500s_bcache /dev/md127
Volume group "vg_500s_bcache" successfully created
~ # lvcreate -L50G -nlv_bcache_test vg_500s_bcache
Logical volume "lv_bcache_test" created
~ # make-bcache -B /dev/vg_500s_bcache/lv_bcache_test
UUID: 0847db15-4d6b-4271-a052-4338752a704f
Set UUID: 06fa14ab-cbbe-4e10-ac5c-f48f92ffea39
nbuckets: 102400
block_size: 8
bucket_size: 1024
nr_in_set: 1
nr_this_dev: 0
first_bucket: 1
~ # echo /dev/vg_500s_bcache/lv_bcache_test>/sys/fs/bcache/register
~ # echo /dev/sdk1>/sys/fs/bcache/register
~ # echo "d5cadc1d-0fb6-4be5-bb32-f649c540c03d">/sys/block/bcache0/bcache/attach
-bash: echo: write error: No such file or directory
You are trying to attach a cache device directly to a backing device.
That won't work.
When you register the devices, do :
ls /sys/fs/bcache/
You will see a directory name in there. That is the UUID of the
"cache-set" you need to attach to your backing device. It is different
from the cache device itself.
Regards,
Brad
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