>>> On 12/30/2016 at 09:42 AM, "Waite, Dick (External)" >>> <dick.wa...@softwareag.com> wrote: > Grand Foggy Day in Darmstadt, > > I wanted to know who's bright idea it was to change between SP-1 and SP-2
I don't believe this is completely accurate. See below. > the format of the udev... This amend and "zypper migration" gives you a good > SP-2 but where is the /boot/zipl ? it's got a SP-1 udev interface so can not > be found and it's a real PITA to get your system back. -snip- > Now I'm all in favour of making better interfaces, but the old interface > should still work, at least between And that is how it should be with SLES12 SP2. > http://www.ibm.com/support/knowledgecenter/linuxonibm/com.ibm.linux.z.lhdd/l > hdd_c_scsi_nodes.html > > An IBM paper that says: > > SCSI device names are assigned in the order in which the devices are > detected. In a typical SAN environment, this can mean a seemingly arbitrary > mapping of names to actual devices that can change between boots. Therefore, > using standard device nodes of the form /dev/<device_name> where > <device_name> is > the device name that the SCSI stack assigns to a device, can be a challenge. > > SUSE Linux Enterprise Server 12 SP2 provides udev to create device nodes for > you. Use the device nodes to identify the corresponding actual device. > > Device nodes that are based on bus IDsEnd of changeStart of changeudev > creates device nodes of the form > > /dev/disk/by-path/ccw-<device_bus_id>-fc-<wwpn>-lun-<lun> > > for whole SCSI device and > > /dev/disk/by-path/ccw-<device_bus_id>-fc-<wwpn>-lun-<lun>-part<n> > > for the <n>th partition, where <wwpn> is the worldwide port number of the > target > port and <lun> is the logical unit number that represents the target SCSI > device. > Note: The format of these udev-created device nodes has changed and now > matches the common code format. Device nodes of the prior form, > ccw-<device_bus_id>-zfcp-<wwpn>:<lun> or > ccw-<device_bus_id>-zfcp-<wwpn>:<lun>-part<n>, > are no longer created. I see those names as _additional_ names, not replacements. One one of my test systems, I booted SP2 and see this: 0:s390vsl133:~ # ll /dev/disk/by-path/ total 0 lrwxrwxrwx 1 root root 9 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630500873a-lun-0x4010400100000000 -> ../../sda lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630500873a-lun-0x4010400100000000-part1 -> ../../sda1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630500873a-lun-0x4010400100000000-part2 -> ../../sda2 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630500873a-lun-0x4010400100000000-part3 -> ../../sda3 lrwxrwxrwx 1 root root 9 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630500873a-lun-0x4011401100000000 -> ../../sdb lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630500873a-lun-0x4011401100000000-part1 -> ../../sdb1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630500873a-lun-0x4011401100000000-part2 -> ../../sdb2 lrwxrwxrwx 1 root root 9 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630510473a-lun-0x4010400100000000 -> ../../sdc lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630510473a-lun-0x4010400100000000-part1 -> ../../sdc1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630510473a-lun-0x4010400100000000-part2 -> ../../sdc2 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630510473a-lun-0x4010400100000000-part3 -> ../../sdc3 lrwxrwxrwx 1 root root 9 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630510473a-lun-0x4011401100000000 -> ../../sdd lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630510473a-lun-0x4011401100000000-part1 -> ../../sdd1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-fc-0x500507630510473a-lun-0x4011401100000000-part2 -> ../../sdd2 lrwxrwxrwx 1 root root 9 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630500873a:0x4010400100000000 -> ../../sda lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630500873a:0x4010400100000000-part1 -> ../../sda1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630500873a:0x4010400100000000-part2 -> ../../sda2 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630500873a:0x4010400100000000-part3 -> ../../sda3 lrwxrwxrwx 1 root root 9 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630500873a:0x4011401100000000 -> ../../sdb lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630500873a:0x4011401100000000-part1 -> ../../sdb1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630500873a:0x4011401100000000-part2 -> ../../sdb2 lrwxrwxrwx 1 root root 9 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630510473a:0x4010400100000000 -> ../../sdc lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630510473a:0x4010400100000000-part1 -> ../../sdc1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630510473a:0x4010400100000000-part2 -> ../../sdc2 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630510473a:0x4010400100000000-part3 -> ../../sdc3 lrwxrwxrwx 1 root root 9 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630510473a:0x4011401100000000 -> ../../sdd lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630510473a:0x4011401100000000-part1 -> ../../sdd1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 ccw-0.0.fa00-zfcp-0x500507630510473a:0x4011401100000000-part2 -> ../../sdd2 lrwxrwxrwx 1 root root 9 Jan 3 20:11 scsi-0:0:0:1073823760 -> ../../sda lrwxrwxrwx 1 root root 10 Jan 3 20:11 scsi-0:0:0:1073823760-part1 -> ../../sda1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 scsi-0:0:0:1073823760-part2 -> ../../sda2 lrwxrwxrwx 1 root root 10 Jan 3 20:11 scsi-0:0:0:1073823760-part3 -> ../../sda3 lrwxrwxrwx 1 root root 9 Jan 3 20:11 scsi-0:0:0:1074872337 -> ../../sdb lrwxrwxrwx 1 root root 10 Jan 3 20:11 scsi-0:0:0:1074872337-part1 -> ../../sdb1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 scsi-0:0:0:1074872337-part2 -> ../../sdb2 lrwxrwxrwx 1 root root 9 Jan 3 20:11 scsi-0:0:1:1073823760 -> ../../sdc lrwxrwxrwx 1 root root 10 Jan 3 20:11 scsi-0:0:1:1073823760-part1 -> ../../sdc1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 scsi-0:0:1:1073823760-part2 -> ../../sdc2 lrwxrwxrwx 1 root root 10 Jan 3 20:11 scsi-0:0:1:1073823760-part3 -> ../../sdc3 lrwxrwxrwx 1 root root 9 Jan 3 20:11 scsi-0:0:1:1074872337 -> ../../sdd lrwxrwxrwx 1 root root 10 Jan 3 20:11 scsi-0:0:1:1074872337-part1 -> ../../sdd1 lrwxrwxrwx 1 root root 10 Jan 3 20:11 scsi-0:0:1:1074872337-part2 -> ../../sdd2 As you can see the old names are still there. 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