With Hitachi and IBM,
those 'mini's are really 1113 Cylinders. The
minimum space they reserve for such a volume
is a 3390-1.
What Ted said is true for the IBM DS8000 (2107) and DS6000 (1750). In
the DS8000 and DS6000 Planning Guides, it clearly states that "the
allocation unit for CKD volumes is a CKD extent, which is exactly 1113
cylinders" and "volumes which are an exact multiple of 1113 cylinders do
not waste any capacity in the last extent" (implying that volumes which
are NOT a 1113 multiple do waste space). So there is no point in
defining very small disks (less than 1113 cylinders) for special
purposes; make them at least 1113.
I don't know if this was true in the 2105 Shark.
--
Bruce A. Black
Senior Software Developer for FDR
Innovation Data Processing 973-890-7300
personal: [EMAIL PROTECTED]
sales info: [EMAIL PROTECTED]
tech support: [EMAIL PROTECTED]
web: www.innovationdp.fdr.com
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