On Sat, Apr 29, 2017 at 2:46 AM, Christophe de Dinechin <dinechin@xxxxxxxxxx> wrote: > Are there btrfs commands I could run on a read-only filesystem that would give me this information? qemu-img info <file> will give you the status of lazy refcounts. lsattr will show a capital C in the 3rd to last position if it's nocow filefrag -v will show many extents with the "unwritten" flag if the file is fallocated. $ lsattr ------------------- ./Desktop ------------------- ./Downloads ------------------- ./Templates ------------------- ./Public ------------------- ./Documents ------------------- ./Music ------------------- ./Pictures ------------------- ./Videos --------c---------- ./tmp ##enable compression ------------------- ./Applications ----------------C-- ./hello.qcow2 ##this is nocow -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
