On Sat, Nov 21, 2009 at 12:58:03PM -0700, Matthew Wilcox wrote: > 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? I could easily, but it would be a very bad idea. -- 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
