====== Howto set a persistent / permanent device name (or change device name) ====== ===== Example with network adapter ===== Template for are located in /lib/udev/rules.d/ Copy the right template corresponding to your wish in /etc/udev/rules.d/ ==== Use the PCI bus identifier as reference to rename your adapter ==== # lspci 00:03.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 02) # ifconfig -a ens192: flags=4163 mtu 1500 inet 172.11.1.1 netmask 255.255.255.0 broadcast 172.16.2.255 inet6 fe80::2d97:92df:16f7:e385 prefixlen 64 scopeid 0x20 ether 00:50:56:bc:4a:86 txqueuelen 1000 (Ethernet) ... lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10 ... Copy the file /lib/udev/rules.d/60-net.rules to /etc/udev/rules.d/60-net.rules Edit the file to interface: SUBSYSTEM=="net", ACTION=="add", KERNELS=="0000:00:03.0", NAME=="eth0" And restart the service, or better reboot # systemctl restart systemd-udevd Or # systemctl reboot Now the adapter name is **eth0**, you can reconfigure the IP address,... # ifconfig -a eth0: flags=4163 mtu 1500 inet6 fe80::2d97:92df:16f7:e385 prefixlen 64 scopeid 0x20 ether 00:50:56:bc:4a:86 txqueuelen 1000 (Ethernet) ... lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10 ... And test the config: # udevadm test /sys/class/net/eth0 ==== Use the MAC address as reference to rename your adapter ==== SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:50:56:bc:4a:86", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" ===== Example with IBM tape library ===== http://www-01.ibm.com/support/docview.wss?uid=swg21664258 To be sure that we can use a unique device name on multiple TSM server for a tape library, we can use the serial number: First install IBM Atape drive (download from FixCentral) Effective drives defined on linux [root@rhtsmp01 dev]# cat /proc/scsi/IBMtape lin_tape version: 3.0.3 lin_tape major number: 247 Attached Tape Devices: Number model SN HBA SCSI FO Path 0 ULT3580-TD5 1068051xxx lpfc 1:0:0:0 NA 1 ULT3580-TD5 9168016xxx lpfc 1:0:1:0 NA 2 ULT3580-TD6 9068800xxx lpfc 1:0:2:0 NA 3 ULT3580-TD6 10WT005xxx lpfc 1:0:3:0 NA 4 ULT3580-TD6 10WT000xxx lpfc 1:0:4:0 NA 5 ULT3580-TD6 10WT000xxx lpfc 1:0:5:0 NA 6 ULT3580-TD3 1210070xxx lpfc 1:0:6:0 NA 7 ULT3580-TD3 1210082xxx lpfc 1:0:7:0 NA 8 ULT3580-TD5 1068055xxx lpfc 2:0:0:0 NA 9 ULT3580-TD6 9068800xxx lpfc 2:0:1:0 NA 10 ULT3580-TD6 10WT000xxx lpfc 2:0:2:0 NA 11 ULT3580-TD6 10WT005xxx lpfc 2:0:3:0 NA 12 ULT3580-TD6 10WT000xxx lpfc 2:0:4:0 NA 13 ULT3580-TD3 1210082xxx lpfc 2:0:5:0 NA 14 ULT3580-TD3 1210177xxx lpfc 2:0:6:0 NA Effective library changer defined on linux [root@rhtsmp01 dev]# cat /proc/scsi/IBMchanger lin_tape version: 3.0.3 lin_tape major number: 247 Attached Changer Devices: Number model SN HBA SCSI FO Path 0 3576-MTL 000001323333_LLA lpfc 1:0:0:1 NA 1 3576-MTL 000001321220_LLA lpfc 1:0:5:1 NA 2 3576-MTL 000001321220_LLA lpfc 2:0:2:1 NA 3 3576-MTL 000001301984_LLB lpfc 2:0:5:1 NA 4 3576-MTL 000001301984_LLB lpfc 2:0:6:1 NA Assign alias to drives [root@rhtsmp01 dev]# cat /etc/udev/rules.d/98-lin_tape.rules KERNEL=="IBMtape*[!n]", ATTR{serial_num}=="10WT002226", SYMLINK="lin_tape/by-id/10WT002226_LTO6D1", MODE="0666" KERNEL=="IBMtape*[!n]", ATTR{serial_num}=="10WT009976", SYMLINK="lin_tape/by-id/10WT009976_LTO6D3", MODE="0666" KERNEL=="IBMtape*[!n]", ATTR{serial_num}=="9068802254", SYMLINK="lin_tape/by-id/9068802254_LTO6D2", MODE="0666" KERNEL=="IBMtape*[!n]", ATTR{serial_num}=="10WT004428", SYMLINK="lin_tape/by-id/10WT004428_LTO6D4", MODE="0666" KERNEL=="IBMtape*[!n]", ATTR{serial_num}=="1068055542", SYMLINK="lin_tape/by-id/1068055542_LTO5D1", MODE="0666" KERNEL=="IBMtape*[!n]", ATTR{serial_num}=="9168016299", SYMLINK="lin_tape/by-id/9168016299_LTO5D2", MODE="0666" KERNEL=="IBMtape*[!n]", ATTR{serial_num}=="1068055766", SYMLINK="lin_tape/by-id/1068055766_LTO5D3", MODE="0666" KERNEL=="IBMtape*[!n]", ATTR{serial_num}=="1068052558", SYMLINK="lin_tape/by-id/1068052558_LTO5D4", MODE="0666" KERNEL=="IBMchanger*",, ATTR{serial_num}=="000001323333_LLA", SYMLINK="lin_tape/by-id/00000132333_LLA_TS3310ROC", MODE="0666" KERNEL=="IBMchanger*",, ATTR{serial_num}=="000001321220_LLA", SYMLINK="lin_tape/by-id/000001321220_LLA_TS3310ROOS", MODE="0666" Scan SCSI bus (FC adapters) [root@rhtsmp01 rc3.d]# ls /sys/class/scsi_host/host*/scan /sys/class/scsi_host/host0/scan /sys/class/scsi_host/host3/scan /sys/class/scsi_host/host1/scan /sys/class/scsi_host/host4/scan /sys/class/scsi_host/host2/scan [root@rhtsmp01 rc3.d]# echo "- - -" > /sys/class/scsi_host/host0/scan [root@rhtsmp01 rc3.d]# echo "- - -" > /sys/class/scsi_host/host1/scan [root@rhtsmp01 rc3.d]# echo "- - -" > /sys/class/scsi_host/host2/scan [root@rhtsmp01 rc3.d]# echo "- - -" > /sys/class/scsi_host/host3/scan [root@rhtsmp01 rc3.d]# echo "- - -" > /sys/class/scsi_host/host4/scan Or rescan-scsi-bus.sh List SCSI devices [root@rhtsmp01 rc3.d]# lsscsi [0:0:0:0] enclosu IBM VSBPD12M1 6GSAS 03 - [0:0:1:0] enclosu IBM VSBPD12M1 6GSAS 03 - [0:0:2:0] cd/dvd TSSTcorp CDDVDW TS-L633B IB03 /dev/sr0 [0:3:0:0] no dev IBM 57D7001SISIOA 0150 - [1:0:0:0] tape IBM ULT3580-TD5 G360 - [1:0:0:1] mediumx IBM 3576-MTL 680G - [1:0:1:0] tape IBM ULT3580-TD5 G360 - [1:0:2:0] tape IBM ULT3580-TD6 G350 - [1:0:3:0] tape IBM ULT3580-TD6 G350 - [1:0:4:0] tape IBM ULT3580-TD6 G350 - [1:0:5:0] tape IBM ULT3580-TD6 G350 - [1:0:5:1] mediumx IBM 3576-MTL 670G - [1:0:6:0] tape IBM ULT3580-TD3 93GP - [1:0:7:0] tape IBM ULT3580-TD3 93GP - [2:0:0:0] tape IBM ULT3580-TD5 G360 - [2:0:1:0] tape IBM ULT3580-TD6 G350 - [2:0:2:0] tape IBM ULT3580-TD6 G350 - [2:0:2:1] mediumx IBM 3576-MTL 670G - [2:0:3:0] tape IBM ULT3580-TD6 G350 - [2:0:4:0] tape IBM ULT3580-TD6 G350 - [2:0:5:0] tape IBM ULT3580-TD3 93GP - [2:0:5:1] mediumx IBM 3576-MTL 640G - [2:0:6:0] tape IBM ULT3580-TD3 93GP - [2:0:6:1] mediumx IBM 3576-MTL 640G - [3:0:0:0] disk IBM 2145 0000 /dev/sda [3:0:1:0] disk IBM 2145 0000 /dev/sdb [3:0:2:0] disk IBM 2145 0000 /dev/sdc [3:0:2:1] disk IBM 2145 0000 /dev/sdd On TSM, define the drive and the drive path using the device persistent name. For example : DEFINE DRIVE LIBRARY_Name DRV_LTO6D1 SERial=AUTOD element=AUTOD Online=YES DEFINE PATH SERVER_NAME DRV_LTO6D1 SRCT=server DESt=drive LIBRARY=LIBRARY_Name device=/dev/lin_tape/by-id/10WT002226_LTO6D1 online=yes