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Under some conditions the zfcpconf.sh script fails, I believe it's when multipath is used. See bellow for journal content when booted with rd.udev.debug
[root@rock-kvmlp-fedora ~]# journalctl | grep zfcpconf
srp 20 07:48:37 rock-kvmlp-fedora.z14.bos.redhat.com systemd-udevd[446]: RUN '/sbin/zfcpconf.sh' /usr/lib/udev/rules.d/56-zfcp.rules:1
srp 20 07:48:37 rock-kvmlp-fedora.z14.bos.redhat.com systemd-udevd[459]: RUN '/sbin/zfcpconf.sh' /usr/lib/udev/rules.d/56-zfcp.rules:1
srp 20 07:48:37 rock-kvmlp-fedora.z14.bos.redhat.com [475]: starting '/sbin/zfcpconf.sh'
srp 20 07:48:37 rock-kvmlp-fedora.z14.bos.redhat.com [476]: starting '/sbin/zfcpconf.sh'
srp 20 07:48:37 rock-kvmlp-fedora.z14.bos.redhat.com systemd-udevd[459]: '/sbin/zfcpconf.sh'(err) '/sbin/zfcpconf.sh: line 50: echo: write error: Resource temporarily unavailable'
srp 20 07:48:37 rock-kvmlp-fedora.z14.bos.redhat.com systemd-udevd[459]: '/sbin/zfcpconf.sh'(err) '/sbin/zfcpconf.sh: line 52: /sys/bus/ccw/drivers/zfcp/0.0.3506/0x500507680b21ea4b/unit_add: No such file or directory'
srp 20 07:48:37 rock-kvmlp-fedora.z14.bos.redhat.com systemd-udevd[459]: '/sbin/zfcpconf.sh'(err) '/sbin/zfcpconf.sh: line 50: echo: write error: Resource temporarily unavailable'
srp 20 07:48:37 rock-kvmlp-fedora.z14.bos.redhat.com systemd-udevd[459]: '/sbin/zfcpconf.sh'(err) '/sbin/zfcpconf.sh: line 52: /sys/bus/ccw/drivers/zfcp/0.0.3506/0x500507680b21ea4a/unit_add: No such file or directory'
srp 20 07:48:37 rock-kvmlp-fedora.z14.bos.redhat.com systemd-udevd[459]: Process '/sbin/zfcpconf.sh' failed with exit code 1.
srp 20 07:48:39 rock-kvmlp-fedora.z14.bos.redhat.com systemd-udevd[446]: Process '/sbin/zfcpconf.sh' succeeded.
[root@rock-kvmlp-fedora ~]# cat /proc/cmdline
root=/dev/mapper/rhel_rock--kvmlp--fedora-root crashkernel=auto rd.lvm.lv=rhel_rock-kvmlp-fedora/root rd.zfcp=0.0.3506,0x500507680b21ea4b,0x0002000000000000 rd.zfcp=0.0.3506,0x500507680b21ea4a,0x0002000000000000 rd.lvm.lv=rhel_rock-kvmlp-fedora/swap cio_ignore=all,!condev rd.znet=qeth,0.0.1100,0.0.1101,0.0.1102,layer2=1,portno=0 rd.udev.debug
There are 2 instances started, one succeeds, the other fails. The result (discovered and enabled disks) isn't affected by this behaviour.
Version-Release number of selected component (if applicable):
s390utils-2.6.0-30.el8.s390x