On Thu, 2011-10-06 at 01:21 +0530, Amit Sahrawat wrote: > > The best we could probably offer is an interface to turn on the WCE bit > > in software (technically, you can do this today > > in /scsi/class/scsi_disk/<disk>/cache_type, it's just that it will try > > to commit the change as a MODE_SELECT which will presumably fail). > Thanks James, is this related with SCSI command MODE_SELECT? and this > is to be passed when there is some failure? > or simply doing an "echo <value>" to > /scsi/class/scsi_disk/<disk>/cache_type? can you please elaborate a > little You tell me since you have the device. What that echo does is that it does try to make the change permanent with a mode select ... that likely won't work and the cache change only takes if the revalidated disk says the write back has been enabled (which I really think it won't). So I think you need an additional software bit to flip for the case where the device lies. James -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
