On Mon, 22 Aug 2011 23:51:55 -0400 Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > Is there any specific reason to require the external bitmap to be on > a file? Currently the code requires regular files to call bmap on them, > which is a fairly dangerous thing to start with. But why don't we just > allow using block devices to store the bitmap directly? No, no specific reason. The original requirement was for storage in a file so that is that was focused on. I can see no reason not to add support for storing directly to a block device. NeilBrown -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html