The track number in MVS 3.8 is 16 bit signed. Patched for TK4- for
unsigned. IBM had to fix it for when 3390-2s came out later.
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On Tue, Jan 12, 2021 at 5:07 PM Drew Derbyshire <swhobbit@...> wrote:
On 1/12/21 2:54 PM, Mike Schwab wrote:
POs are 16 extents, 1 volume. 1 volume limited to 32K tracks TK3
(3390-1.9) or 64K tracks TK4- (3390-3.8)
PS are 16 extents 4GB.
That's 16 extents per volume. Default (for example, on tape) is six
volumes; you can raise the limit.
Most older types (3380 and older?) are smaller than 4 GB. Where does
that limit come, and is per volume or per dataset?
VSAM 4GB over 12x extents 59 volumes.
On Tue, Jan 12, 2021 at 4:20 PM Mark Waterbury
<mark.s.waterbury@...> wrote:
Does anyone recall the maximum size of files (PS, PO, DA, and VSAM) that can be created in MVS 3.8J?
Also, considering that 3380 and 3390 support have apparently been "retrofitted" to the TK4- version ...
Thanks in advance.
--
Drew Derbyshire
WNTC radio - Why Not Try Clyde?
--
Mike A Schwab, Springfield IL USA
Where do Forest Rangers go to get away from it all?
