I forgot to put a subject. Now there’s one. :-) Don On Thu, Jun 28, 2018 at 14:27 Donald Russell <russell....@gmail.com> wrote:
> I have RHEL 7 system on a mod-9 (10016 cup) ECKD DASD and want to move it > to a mod-27 (32759 cyl). > > The disk is not in use, I used zVM/CMS to DDR the disk to the larger one. > Then I attached it to a zLinux system to format the back end of the disk. > After that I would remove the last partition and create a new partition > extending to the end of disk and finally resize the file system in that > partition. > > The dasdfmt -b 4096 --mode=expand worked great. Started formatting the > disk at track 150240 as expected. But then fdasd choked saying only the > first 10016 cylinders are formatted so I can’t create the new larger > partition. > > How can I coerce fdasd into doing the right thing? Whatever fdasd is > looking at for that cylinder count I expected dasdfmt to update. > > Where is that data, maybe I can just zap it with some other tool like cms > pipe read/write track. > > I also tried dasdfmt --mode=quick which fixed my fdasd issue. It now got > the right size of the disk but that removes the IPL record and who knows > what else so the disk was no longer bootable. > > Any suggestions beyond install from scratch on the larger disk? :-) > > Thanks, > Don > > Thu 28 Jun 20:58:17 UTC > [root@sl55zdump] ~ > #dasdfmt -b 4096 --mode=expand /dev/dasdr > Expansion mode active. Searching for starting position... > Done. Unformatted part starts at track 150240. > Drive Geometry: 32759 Cylinders * 15 Heads = 491385 Tracks > > I am going to format the device /dev/dasdr in the following way: > Device number of device : 0x200 > Labelling device : yes > Disk label : VOL1 > Disk identifier : 0X0200 > Extent start (trk no) : 150240 > Extent end (trk no) : 491384 > Compatible Disk Layout : yes > Blocksize : 4096 > Mode : Expand > > Type "yes" to continue, no will leave the disk untouched: yes > Formatting the device. This may take a while (get yourself a coffee). > > Finished formatting the device. > Rereading the partition table... ok > > Thu 28 Jun 21:05:40 UTC > [root@sl55zdump] ~ > #fdasd /dev/dasdr > reading volume label ..: VOL1 > reading vtoc ..........: ok > WARNING: This device is not fully formatted! Only 10016 of 32759 cylinders > are available. > > > > > > > > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
