Tejun Heo wrote: > Simon Farnsworth wrote: >> Just a thought; is it possible to trigger libata EH from userspace? If >> so, we could write a small utility to disable write cache, then force EH >> to detect the change. > > That's automatically done. libata snoops cache on/off and triggers > revalidation but you can request manual rescan by echoing "- - -" to > /sys/class/scsi_host/hostX/scan. > Would it be worth changing our code to do "hdparm -W1 /dev/sda && hdparm -W0 /dev/sda", or would this not show anything. The lack of revalidation on some drives is what's worrying me a little here. -- Simon Farnsworth - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
