Robert,
I have seen many layouts. Some ranging from what you talk about to the
other extreme where each minidisk is a separate device. Each has it;s
benefits. From a performance aspect, I would separate the system files
across multiple drives. Since 99% of MAINT's disks are rarely used I see
no problem with them all on one disk.
With Hercules ability to create disk devices that do not use the full
allocation (compressed disk) quickly, there is no advantage to packing
everything on a few devices.
George
Robert O'Hara wrote:
>
>
>
> I am looking at reworking the arrangement of disks in the VM 5-pack system.
>
> I have looked at the current disk utilization of MAINT, and I believe
> that all of his minidisks can comfortably fit on a single 3350. Also,
> all of the VM system disks (PERM, TDSK, TEMP) can fit on a single 3350.
>
> Now of course on a real mainframe we would want these disks spread out
> over several channels, but it seems to me that with Hercules it does not
> matter. Is that a correct assumption?
>
> I propose:
>
> disk 1: PERM, TEMP, TDSK
> disk 2: all of MAINT's disks
> disk 3: OPERATOR, RSCS, RSCS1, CPWATCH, AUTOLOG1, CMSBATCH,
> ALGOL, BREXX, COBOL, DOSVS, OSBASIC, PLI, PL360, RPG,
> SCRIPT, TAPEMAC, WATFIV
> disk 4: GCCCMS
> disk 5: REGINA, CMSUSER
>
> Comments on this layout?
>
> Thanks, Bob
>
>
