On 05/12/2014 14:05, Ming Lei wrote: > > [ 50.112885] sd 0:0:1:0: [sda] FAILED Result: hostbyte=DID_OK > driverbyte=DRIVER_SENSE > [ 50.113859] sd 0:0:1:0: [sda] Sense Key : Illegal Request [current] > [ 50.113859] sd 0:0:1:0: [sda] Add. Sense: Invalid field in cdb > [ 50.113859] sd 0:0:1:0: [sda] CDB: > [ 50.113859] Write same(16): 93 08 00 00 00 00 00 00 80 00 00 40 00 00 00 00 > [ 50.113859] blk_update_request: critical target error, dev sda, sector > 32768 So this command is zeroing 2^22 sectors (2GB) starting from sector 128. How did you run QEMU and what command produced this request? Paolo -- 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