Hi Martin, You might also be interested to know about 'lsblk' which looks like it can detect whether discard is supported on device-mapper devices:
(one version of is supported) $ lsblk -Dl NAME DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO sda 0 4K 2G 1 sda1 0 4K 2G 1 sys-rootfs-real (dm-4) 0 4K 2G 1 sys-rootfs (dm-0) 0 4K 2G 1 sys-20141008--rootfs--snap (dm-3) 0 4K 2G 1 sys-20141008--rootfs--snap-cow (dm-5) 0 4K 2G 1 sys-20141008--rootfs--snap (dm-3) 0 4K 2G 1 sda2 0 4K 2G 1 sdb 0 0B 0B 0 sdb1 0 0B 0B 0 sr0 0 0B 0B 0 (one version of not supported) # lsblk -lD NAME DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO vda 0 0B 0B 0 vda1 0 0B 0B 0 vda2 0 0B 0B 0 sys-swap (dm-1) 0 0B 0B 0 sys-rootfs-real (dm-3) 0 0B 0B 0 sys-rootfs (dm-0) 0 0B 0B 0 sys-20141008--rootfs--snap (dm-2) 0 0B 0B 0 sys-20141008--rootfs--snap-cow (dm-4) 0 0B 0B 0 sys-20141008--rootfs--snap (dm-2) 0 0B 0B 0 sr0 0 0B 0B 0 Thanks! C. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
