On 04.02.2003 at 09:12:39, James Melin <[EMAIL PROTECTED]> wrote: > As I am sitting here designating the file system for my next Linux LPAR, It > occurs to me that it will be advantageous to take the 2 remaining 3390-mod > 3 1 gig custom volumes I have and make them into a single 2 gig volume with > LVM. My management wants all this done in CDL so that we can take volume > backups, etc. via S/390.
I hope it\'s safe to assume that you did not really mean 3390 Mod 3, since they are actually 2GB already... > The question I have is this - what are the implications/problems/concerns > with having 2 CDL volumes (2 vtocs, etc) in a Linux managed LVM? There should be no major issues that you need to concern yourself with, other than the well-known requirement to have your Linux system down when you are taking the backup. I\'m thinking that with LVM involved this is particularly important. Make sure that the backup takes all the CDL datasets that comprise a given LVM set at the same time, and that they are restored (if required) from the same backup, to make sure that you have no issues with inconsistencies in LVM metadata. Remember that the VTOC (what there is of one) does not contain any information about the contents of the Linux filesystem. Think about the HFS datasets on your OS/390 systems: they just look like big sequential datasets to MVS. Linux is oblivious to the fact that the VTOC even exists (except for its creation using the fdasd command). Hope this helps. Cheers, Vic Cross
