November 2003
Intermediate to advanced
212 pages
6h 37m
English
book
S/390 PartnerWorld for Developers, ITSO/EFS Project EFS Systems on a Linux Base: Additional Topics
by Bill Ogden, Michael Ryan
Content preview from S/390 PartnerWorld for Developers, ITSO/EFS Project EFS Systems on a Linux Base: Additional Topics
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22 EFS Systems on a Linux Base: Additional Topics
The command can specify any device address on the control unit. The dedicated lines
column indicates the number of dedicated (non-floating) cache tracks. A clear
ckdcachestats cuu command can be used to reset the statistics. The
lines used column
includes any floating cache being used.
You can display the definition of an emulated disk with the d devstate cuu command:
flexes> d devstate A87
Filename: /s390/OS39HA State: OPEN, READY
Options: trackcachesize=30
2.5 How many emulated volumes
On a small EFS system all your S/390 DASD volumes are emulated on a small number of
“real” disks—in the most ex ...
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