On Fri, Jan 21, 2011 at 07:43:47PM +0000, David Pottage wrote:

On 21/01/11 17:20, Rodney Beede wrote:

quoted

Any tools to go about zeroing about the free space on a btrfs file
system so I can shrink the VMware vmdk virtual disk?

I ran the VMware command, but the dynamic disk is still really big.  I
presume it is due to free space that isn't zeroed out.

Does btrfs issue TRIM commands to the underlying (virtual) block device?

  It does when mounted with - o discard.  IIRC, btrfs also supports
FITRIM ioctl (but I'm not 100% sure about this).
 
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