so with fresh and clean disks it works - even if using the not recommended way to use echo for setting the disks online (rather than the recommended way of using chzdev):
# during installation in d-i 0.0.0200 (configured) 0.0.0301 (configured) # minidisk 1st part or dasd 2605 mod09 0.0.0302 # minidisk 2nd part or dasd 2605 mod09 0.0.0303 # minidisk 2nd part or dasd 2605 mod09 # only the 1st part configured and used during installation, just to verify that it works in general ... # rough sample disk layout DASD 0.0.0200 (ECKD) - 7.4 GB IBM S390 DASD drive > #1 400.0 MB f ext2 /boot > #2 6.5 GB f ext4 / > #3 484.4 MB f swap swap > 49.2 kB unusable DASD 0.0.0301 (ECKD) - 2.5 GB IBM S390 DASD drive > #1 2.5 GB f ext4 /test301 - # after installation ubuntu@hwe0009:~$ lsdasd Bus-ID Status Name Device Type BlkSz Size Blocks ============================================================================== 0.0.0200 active dasda 94:0 ECKD 4096 7042MB 1802880 0.0.0301 active dasdb 94:4 ECKD 4096 2340MB 599040 ubuntu@hwe0009:~$ - # other minidisks visible ... ubuntu@hwe0009:~$ ls -la /sys/bus/ccw/devices/0.0.03* lrwxrwxrwx 1 root root 0 Nov 22 13:33 /sys/bus/ccw/devices/0.0.0301 -> ../../../devices/css0/0.0.0002/0.0.0301 lrwxrwxrwx 1 root root 0 Nov 22 13:33 /sys/bus/ccw/devices/0.0.0302 -> ../../../devices/css0/0.0.0003/0.0.0302 lrwxrwxrwx 1 root root 0 Nov 22 13:33 /sys/bus/ccw/devices/0.0.0303 -> ../../../devices/css0/0.0.0004/0.0.0303 - # setting 2nd part aka minidis online ubuntu@hwe0009:~$ cat /sys/bus/ccw/devices/0.0.0302/online 0 - # trial using echo to set device online (even if chzdev is recommended) root@hwe0009:~# echo 1 > /sys/bus/ccw/devices/0.0.0302/online root@hwe0009:~# cat /sys/bus/ccw/devices/0.0.0302/online 1 - # fully enabled disk in Linux using chzdev root@hwe0009:~# chzdev dasd 0.0.0302 -e ECKD DASD 0.0.0302 configured - # format works w/o any issues root@hwe0009:~# dasdfmt -b 4096 -d cdl -f /dev/disk/by-path/ccw-0.0.0302 -y Finished formatting the device. Rereading the partition table... ok root@hwe0009:~# - # disk is there root@hwe0009:~# lsdasd Bus-ID Status Name Device Type BlkSz Size Blocks ============================================================================== 0.0.0200 active dasda 94:0 ECKD 4096 7042MB 1802880 0.0.0301 active dasdb 94:4 ECKD 4096 2340MB 599040 0.0.0302 active dasdc 94:8 ECKD 4096 2340MB 599040 root@hwe0009:~# So this is a '+1' for Dimitris investigations that your issue is probably caused by the LVM config ... -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1643527 Title: dasdfmt fails after vary online. syslog show strange message "The disk layout of the DASD is not supported" Status in Ubuntu on IBM z Systems: New Status in linux package in Ubuntu: Incomplete Bug description: Problem description: procedure: echo 1 > /sys/bus/ccw/devices/0.0.0199/online /sbin/chzdev dasd-eckd 0199 -e -p /sbin/dasdfmt -b 4096 -d cdl -f /dev/disk/by-path/ccw-0.0.0199 -y dasdfmt fails with: /sbin/dasdfmt: Unable to open device /dev/disk/by-path/ccw-0.0.0199: No such device looking at the syslog i can see a strange message that only comes out when i am having this issue: Nov 21 08:52:12 JUUB16MS kernel: [ 67.412484] dasd-eckd 0.0.0199: The disk layout of the DASD is not supported lsdasd returns: root@JUUB16MS:~# lsdasd Bus-ID Status Name Device Type BlkSz Size Blocks ============================================================================== 0.0.0192 active dasda 94:0 ECKD 4096 5070MB 1298160 0.0.0195 active dasdb 94:4 FBA 512 40MB 81920 0.0.0193 n/f dasdc 94:8 ECKD 0.0.0196 active dasdd 94:12 FBA 512 40MB 81920 0.0.0194 n/f dasde 94:16 ECKD 0.0.0197 n/f dasdf 94:20 ECKD 0.0.0198 n/f dasdg 94:24 ECKD 0.0.0199 n/f dasdh 94:28 ECKD you can see that the 199 is not format and can't be formatted... a workaround is to vary the disk offline and then online again. this time it will start ok and you can format it and work with it. ------------------------------ just to be clear... this happens after linking to an un-formatted disk dynamically and then vary it online... for example: vmcp link '*' 199 199 echo 1 > /sys/bus/ccw/devices/0.0.0199/online /sbin/chzdev dasd-eckd 0199 -e -p /sbin/dasdfmt -b 4096 -d cdl -f /dev/disk/by-path/ccw-0.0.0199 -y To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1643527/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp