Re: Number of MOD-27 Cylinders for a z/Linux guest

[Tom Rae]

Not quite. Sounds like the DS8000 architecture allocates DASD in 3390 
mod1-sized extents, so requesting a 1114 cylinder DASD results in the 
allocation of two 1113 cylinder extents. The first extent is fully 
utilized as the first 1113 cylinders of the requested DASD, but only the 
first cylinder of the second extent is used (as the last cylinder of the 
requested DASD) and the other 1112 cylinders are allocated but unusable.

(nb "extent" is used because it seems to fit, but it's probably not the 
correct term...)

zMan wrote:

"1112 cylinders are wasted" -- out of 1114? That can't be right!