I'm trying to set up an SSD as a cache to my external HDD (which is where my installation of Debian testing/stretch is installed). My installation is using LVM 2. I'm trying to have the SSD cache the entire external HDD, and not just one of the partitions (such as the root or home partitions).
Here are the relevant outputs.
uname -a: (Yes, I'm using the Debian stable kernel with Debian testing.)
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3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u3 (2015-08-04) x86_64 GNU/Linux
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NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 149.1G 0 disk
sdb 8:16 0 111.8G 0 disk
sdc 8:32 0 298.1G 0 disk
├─sdc1 8:33 0 243M 0 part /boot
└─sdc5 8:37 0 297.8G 0 part
└─sdb5_crypt 254:0 0 297.8G 0 crypt
├─mydebianhostname--vg-root 254:1 0 14.3G 0 lvm /
├─mydebianhostname--vg-swap_1 254:2 0 11.5G 0 lvm [SWAP]
└─mydebianhostname--vg-home 254:3 0 267G 0 lvm /home
sr0 11:0 1 25M 0 rom
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Can't open dev /dev/sdc: Device or resource busy
Could someone help me get this to work please?
Any input would be greatly appreciated!