> I have backed up using DFDSS three device units (123d, 123e, > 132f). I have > root filesystem on 123d. I am running LVM and I have > dedicated units 123e, > and 132f. <snip> > Assuming that I shut down Linux again, if I mirror the device > unit 123d > (where the root filesystem is located) to another device unit > (such as 1116, > how can I boot from 138a? Do I need to change the fstab, or the > /proc/dasd/devices file? The other two disk units are managed by LVM. >
If I understand your setup correctly, you want to be changing from using 123d as your root filesystem to using 1116, and you ipl 138a? Since all you want to change are addresses, you should be able to just run zipl with the new addresses in the dasd parameters and be all set at next ipl. Your /etc/fstab should be staying the same, and you shouldn't need to issue any commands into the /proc/dasd/devices interface. So you'll change the parameters line in zipl.conf from something quasi-resembling: parameters="root=/dev/dasdb1 dasd=138a,123d-123f" to parameters="root=/dev/dasdb1 dasd=138a,1116,123e-123f" (or possibly 1116-1118 if you want to use different addresses for LVM too). The order of these dasd addresses are important since it is their order that determines if an address corresponds to dasda or dasdb or dasdc etc... keep the order the same as you currently have. If all that are changing are the subchannel addresses, you copied the data full-volume, and you are mindful of dasd address ordering, then you don't have to worry about /etc/fstab since /dev/dasda1 /dev/dasdb1 etc should correspond to the same data (as backed up by DFDSS) as the originals. Also, you might want to do something about the volsers (unless it's no problem to have them the same). You can change them with fdasd (option v). ~ Daniel ----------------------------------------------------------------------- This message is the property of Time Inc. or its affiliates. It may be legally privileged and/or confidential and is intended only for the use of the addressee(s). No addressee should forward, print, copy, or otherwise reproduce this message in any manner that would allow it to be viewed by any individual not originally listed as a recipient. If the reader of this message is not the intended recipient, you are hereby notified that any unauthorized disclosure, dissemination, distribution, copying or the taking of any action in reliance on the information herein is strictly prohibited. If you have received this communication in error, please immediately notify the sender and delete this message. Thank you.
