I have this setup: /dev/md127 - raid1 with one sata 3Tb drive /dev/sdb SSD disk with 240 Gb I'm succeseful create bcache0 device and format it to ext4. /dev/bcache0 /var/lib/libvirt/images ext4 rw,relatime,journal_checksum,journal_async_commit,errors=remount-ro,min_batch_time=15000,max_batch_time=60000,data=ordered 0 0 After that i'm install kvm virtual machine and tries to create some activity via iozone fio and other. But stats says nothing. What i miss? root@node03:~# cat /sys/fs/bcache/76907875-ef3b-48b1-8531-f880e64487a8/stats_day/* 0 0 0 0 0 0 0 0 -- Vasiliy Tolstov, e-mail: v.tolstov@xxxxxxxxx jabber: vase@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html