On Sat, Nov 21, 2009 at 05:13:56AM -0500, Christoph Hellwig wrote: > On Fri, Nov 20, 2009 at 09:45:21PM -0500, Martin K. Petersen wrote: > > The discard ioctl is used by mkfs utilities to clear a block device > > prior to putting metadata down. However, not all devices return zeroed > > blocks after a discard. Some drives return stale data, potentially > > containing old superblocks. It is therefore important to know whether > > discarded blocks are properly zeroed. > > At least for mkfs.xfs we make sure to still zero the important areas > after the TRIM ioctl anyway. Could you change that to zero _before_ the TRIM? -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
