To facilitate testing Linux 64 bit LUNs (the kernel holds only 32 bit LUNs internally at the moment), I have put up beta versions of lsscsi and the sg3_utils packages, see the top of this page: http://sg.danny.cz/sg/ lsscsi version 0.27 (beta 1) adds a --lunhex (-x) option, here is an example of its use: # lsscsi -gs [0:0:0:0] disk ATA INTEL SSDSC2CW12 400i /dev/sda /dev/sg0 [7:0:0:1] disk Linux scsi_debug 0004 /dev/sdb /dev/sg1 [7:0:0:49409]wlun Linux scsi_debug 0004 - /dev/sg2 # lsscsi -g --lunhex [0:0:0:0x0000] disk ATA INTEL SSDSC2CW12 400i /dev/sda [7:0:0:0x0001] disk Linux scsi_debug 0004 /dev/sdb [7:0:0:0xc101] wlun Linux scsi_debug 0004 - # lsscsi -xx [0:0:0:0x0000000000000000] disk ATA INTEL SSDSC2CW12 400i /dev/sda [7:0:0:0x0001000000000000] disk Linux scsi_debug 0004 /dev/sdb [7:0:0:0xc101000000000000] wlun Linux scsi_debug 0004 - Additionally if sysfs offers a 64 bit (unsigned) integer in decimal for a LUN then this version will use it (previous lsscsi versions would have truncated the LUN to 32 bits). In the sg3_utils beta the sg_luns utility is expanded to better handle T10 (SAM-5) LUNs and represent them in Linux 'word flipped' form if requested. sg_luns has an additional --test=LUNHEX option that can be used for decoding arbitrary T10 LUNs, for example: # sg_luns --test=020304aa01bb00ff Decoded LUN: Peripheral device addressing: bus_id=2, target=3 >>Second level addressing: Peripheral device addressing: bus_id=4, target=170 >>Third level addressing: Peripheral device addressing: bus_id=1, target=187 >>Fourth level addressing: Peripheral device addressing: lun=255 # sg_luns --test=020304aa01bb00ff -H Decoded LUN: Peripheral device addressing: bus_id=0x02, target=0x03 >>Second level addressing: Peripheral device addressing: bus_id=0x04, target=0xaa >>Third level addressing: Peripheral device addressing: bus_id=0x01, target=0xbb >>Fourth level addressing: Peripheral device addressing: lun=0xff # sg_luns --test=020304aa01bb00ffL -H Linux 'word flipped' integer LUN representation: 0xff01bb04aa0203 Decoded LUN: Peripheral device addressing: bus_id=0x02, target=0x03 >>Second level addressing: Peripheral device addressing: bus_id=0x04, target=0xaa >>Third level addressing: Peripheral device addressing: bus_id=0x01, target=0xbb >>Fourth level addressing: Peripheral device addressing: lun=0xff Now I'm hoping Hannes Reinecke will issue a new set of the "scsi: 64-bit LUN support" patches that address the issues that have been brought up. Then the real testing can begin. Doug Gilbert -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
