On Thu, 20 Nov 2003, Jim Sibley wrote: > Would that the developers had used a VTOC that showed > the pack 100% full and we would have no problem.
A hearty "amen" to that! Remember AIX/370? Sure you do, if only because we have made mention of it here from time to time. AIX/370 did not do the low-level format. That is, it would not pre-block your CKD disks for you. You had to use CMS FORMAT for that. But CMS FORMAT naturally also slapped a CMS filesystem on it. After the CMS FORMAT step, you could use a volume with AIX and put (prabably UFS) a Unix filesystem onto it. Trouble was that the Unix FS did not obliterate the CMS FS. The disk *looked* like an empty CMS minidisk from some angles. I got bitten pretty severely by this. So to prepare for "crossing over" from one system to another (which is the obvious goal of CDL), it is incumbent upon us to do more due diligence. (Love that term, eh?) Any subsystem which impinges upon multiple environments must account for the impact and perception in all environments. -- R;
