Hi Jose, On Fri, 2012-10-26 at 10:46 +0200, JOSE wrote: > We tried to write to this file but we can't save the changes. The file > isn't writeable > Please don't top-post, as it makes responses harder to read.. FYI, this topic was discussed on the list recently here: http://comments.gmane.org/gmane.linux.scsi.target.devel/2703 The vpd_unit_serial configfs attribute for EVPD=0x80 is in fact writeable and saved across target restart, but what is returned by EVPD=0x83 device identifier (which is what ESX uses for SCSI world-wide naming) is not writeable because SPC defines a specific format this value needs to be. Thus far I've not heard a good reason for exposing configurable EVPD=0x83 data to configfs. However, note that vpd_unit_serial is currently used to build up the VENDOR SPECIFIC areas of EVPD=0x83 device identifier to ensure world-wide uniqueness. --nab -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html