So far I reproduced this with 3.4.0. I'll try a more recent kernel tomorrow. It reproduces with both loopback and iSCSI backends. Here is it with loopback. The configuration is: cd /sys/kernel/config/target mkdir -p core/pscsi_0/sda echo scsi_host_id=0,scsi_channel_id=0,scsi_target_id=0,scsi_lun_id=0 > core/pscsi_0/sda/control echo /dev/sda > core/pscsi_0/sda/udev_path echo 1 > core/pscsi_0/sda/enable mkdir -p loopback/naa.600140554cf3a18e/tpgt_1 mkdir -p loopback/naa.600140554cf3a18e/tpgt_1/lun/lun_1 cd loopback/naa.600140554cf3a18e/tpgt_1 echo naa.60014053226f0388 > nexus ln -sf ../../../core/pscsi_0/sda lun/lun_1/virtual_scsi_port echo '- - -' > `echo /sys/bus/tcm_loop_bus/drivers/tcm_loop/tcm_loop_adapter_0/host*/scsi_host/host*/scan` This works: # sg_read blk_sgio=1 if=/dev/sdb skip=20807 count=2 cdbsz=10 > /dev/null Assume default 'bs' (block size) of 512 bytes reading: SCSI status: Check Condition Fixed format, current; Sense key: Illegal Request Additional sense: Logical block address out of range sg_read: SCSI READ failed Some error occurred, remaining block count=2 0+0 records in # sg_read blk_sgio=1 if=/dev/sda skip=20807 count=2 cdbsz=10 > /dev/null Assume default 'bs' (block size) of 512 bytes reading: SCSI status: Check Condition Fixed format, current; Sense key: Illegal Request Additional sense: Logical block address out of range sg_read: SCSI READ failed Some error occurred, remaining block count=2 0+0 records in This doesn't: # sg_read blk_sgio=1 if=/dev/sda skip=0x80000000 count=2 cdbsz=10 > /dev/null Assume default 'bs' (block size) of 512 bytes reading: SCSI status: Check Condition Fixed format, current; Sense key: Illegal Request Additional sense: Logical block address out of range sg_read: SCSI READ failed Some error occurred, remaining block count=2 0+0 records in # sg_read blk_sgio=1 if=/dev/sdb skip=0x80000000 count=2 cdbsz=10 > /dev/null Assume default 'bs' (block size) of 512 bytes reading: SCSI status: Check Condition Fixed format, current; Sense key: Illegal Request vendor specific ASC=80, ASCQ= 0 sg_read: SCSI READ failed Some error occurred, remaining block count=2 0+0 records in and leaves this in dmesg: [ 196.672498] LBA: 2147483648 Sectors: 2 exceeds transport_dev_end_lba(): 20809 HTH, Paolo -- 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
