Hi. I have a linux cluster using tgtd as a target and openiscsi as an initiator. At the moment, before export, I do something like tgtadm -L iscsi -m logicalunit -o update -t $TID -l 1 -P mode_page=8:0:18:0x10:0:0xff:0xff:0:0:0xff:0xff:0xff:0xff:0x80:0x14:0:0:0:0:0:0 to disable writeback caching on the target host. I'm wondering about dropping this, but I don't properly understand how iscsi handles write-caching at the target and therefore whether this is safe or not. If the target host crashes or suffers a power failure and is then restarted, the initiator will continue where it left off, but data in the target's writeback cache (presumably just page cache?) will have been lost. Will the initiator have retained the data that hadn't reached disk and understand that it needs to resend, or will the volume end up corrupted with the initiator's page cache not matching the real content on the disk? Best wishes, Chris. -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
