On Mar 18, 2013, at 1:18 PM, Chris Mason <chris.mason@xxxxxxxxxxxx> wrote: > > We don't do this now for other reasons mentioned in the thread. The > best path to get here is to use trim, and to find a device that supports > a secure erase trim (I don't know if this even exists, sorry). I'm not finding a reference to "secure erase trim". In any case I wouldn't expect it to differ from trim. The requirement for ATA SECURITY ERASE UNIT is to replace LBA 0 to READ NATIVE MAX contents with either 0s or 1s. ENHANCED SECURITY ERASE UNIT additional requires data overwrite, including sectors not in use. But there's no requirement for what kind of data is used for overwriting. 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
