Use the command ‘cat /proc/scsi/scsi‘ to check attached scsi devices. Below example shows IBM Ultrium generation 6 (LTO-6) Tape Drives attached to this Linux system.
# cat /proc/scsi/scsi Attached devices: Host: scsi10 Channel: 00 Id: 00 Lun: 00 Vendor: IBM Model: ULT3580-TD6 Rev: F9A0 Type: Sequential-Access ANSI SCSI revision: 06 Host: scsi3 Channel: 00 Id: 00 Lun: 00 Vendor: IBM Model: ULT3580-TD6 Rev: F9A0 Type: Sequential-Access ANSI SCSI revision: 06
# yum install sg3_utils
# sg_map -i -x /dev/sg2073 12 0 0 0 1 /dev/nst0 IBM ULT3580-TD6 F9A0 /dev/sg2075 10 0 0 0 1 /dev/nst2 IBM ULT3580-TD6 F9A0
Command ‘systool’ shows WWPN of Tape Devices attached to Linux System. Command ‘systool’ requires the libsysfs and sysfsutils packages to be installed. You need to install them first if they are not installed.
# yum install libsysfs # yum install sysfsutils
# systool -c fc_transport -v
Class = "fc_transport"
Class Device = "0:0"
Class Device path = "/sys/devices/pci0000:80/0000:80:02.0/0000:84:00.0/host3/rport-3:0-0/target3:0:0/fc_transport/target3:0:0"
node_name = "0x500308c3a30dc094"
port_id = "0x511d00"
port_name = "0x500308c3a30dc095"
uevent =
Device = "target3:0:0"
Device path = "/sys/devices/pci0000:80/0000:80:02.0/0000:84:00.0/host3/rport-3:0-0/target3:0:0"
uevent = "DEVTYPE=scsi_target"
Class Device = "0:0"
Class Device path = "/sys/devices/pci0000:c0/0000:c0:02.0/0000:c4:00.1/host10/rport-10:0-0/target10:0:0/fc_transport/target10:0:0"
node_name = "0x500308c3a30dc0a8"
port_id = "0x511b00"
port_name = "0x500308c3a30dc0a9"
uevent =
Device = "target10:0:0"
Device path = "/sys/devices/pci0000:c0/0000:c0:02.0/0000:c4:00.1/host10/rport-10:0-0/target10:0:0"
uevent = "DEVTYPE=scsi_target"