If Michael used "yast dasd" to enable the disk, this would have internally used dasd_configure and that indeed necessary part would be good. However, there are more things necessary regarding root-fs to make it sufficient:

http://www.mail-archive.com/[email protected]/msg67867.html
http://www.mail-archive.com/[email protected]/msg67849.html
(I recommend to use "dracut -f" instead of "mkinitrd")

meanwhile we specifically give hints:

SLES12 http://www.ibm.com/support/knowledgecenter/linuxonibm/com.ibm.linux.z.lhdd/lhdd_t_pitfall_scsi.html#lhdd_t_pitfall_scsi

Ubuntu 16.04 http://www.ibm.com/support/knowledgecenter/en/linuxonibm/com.ibm.linux.z.ludd/ludd_t_pitfall_scsi.html#ludd_t_pitfall_scsi

RHEL 7 http://www.ibm.com/support/knowledgecenter/linuxonibm/com.ibm.linux.z.lgdd/lgdd_c_ipl_ramdisk.html (this book is a bit older than the other two and thus does not describe the steps in detail; they are: dracut -f && zipl; see also https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/chap-post-installation-configuration-s390.html#sect-post-installation-dasds-on-root-s390)

On 11/17/2016 12:57 AM, Marcy Cortes wrote:
This generally happens when you miss the dasd_configure step which adds it into 
/etc/udev/rules.d/


-----Original Message-----
From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Michael 
Weiner
Sent: Wednesday, November 16, 2016 3:55 PM
To: [email protected]
Subject: [LINUX-390] Expanding disk

Hi group!

I have created an LVM on root root and about a month ago I expanded / resized 
it using yast.

I formatted the DASD
CreAted the partition
Added the volume to vgroot
Expanded the LVM and finished.

Today I went to bring up the machine and it was complaining about lvroot that 
it was missing a disk.

If I followed the above process, why would the disk be missing?

Did I miss something?

Thanks!!!

Mike

--
Mit freundlichen Grüßen / Kind regards
Steffen Maier

Linux on z Systems Development

IBM Deutschland Research & Development GmbH
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