> Actually, the key point is: > Ensure that the cylinders you _FORMAT_ with CPFMTXA for CP's use (as PAGE, > SPOL, DRCT) match exactly the cylinders that you _ALLOCATE_ with CPFMTXA > for those uses.
Much better worded. Yes, that's what I meant. Thanks, Mike. > IMHO, and as David implies, formatting new DASD specifying 0-END and > *then* performing the ALLOCATE is a good practice - even if you don't > actually plan to use all of the DASD for CP's use. By ensuring that the > cylinder formatting and allocation mapping match, you avoid the situation > where you missed formatting a single cylinder. Been there, done that - > forgetting to include cylinder zero in the total cylinder count back in my > young pup days (i.e. a 3390-3 has 3339 cylinders, but ends with cylinder > 3338). I may just be paranoid, but I do this for ANY DASD that I get or recycle, regardless of whether I use it for CP areas or not. It's probably less necessary than it used to be now that most disk is emulated, but always doing a CP format on new/recycled DASD tends to help save you tracking down this kind of problem later.
