HP StorageWorks XP Disk Array Mainframe Host Attachment and Operations Guide XP24000, XP20000 (A5951 - 96151, September 2007)

Return CodeStorage SystemArgumentCommand
CC = 12, F/M = 04 (EC=66BB) Error, not a
data check. Processing terminated.
XP disk array
CC = 0, Data/Nodata parameter not allowed.RAMACDATA, NODATA
CC=0XP disk array
CC = 0, ALT information not displayed.RAMACCONTROL
CC = 0, ALT information not displayed.XP disk array
CC = 0, ALT information not displayed.RAMACINIT
CC = 0XP disk array
CC = 0, ALT information not displayed.RAMACREFORMAT
CC=0XP disk array
CC = 0, Readcheck parameter not allowed.RAMACCPVOLUME
CC=0XP disk array
Readcheck parameter not allowed.RAMACAIXVOL
CC = 0XP disk array
z/OS (MVS) Cache Operations
To display the cache statistics under MVS DFSMS, use the following operator command: D SMS,
CACHE. The following example shows the cache statistics reported by the storage system. The storage
system reports cache statistics for each SSID in the storage system. Because the dynamic cache
management algorithm has been enhanced, the read and write percentages for the storage system
are displayed as N/A. For further information on MVS DFSMS cache reporting, see the IBM
documentation.
SSID DEVS READ WRITE HIT RATIO FW BYPASSES
0004 15 N/A N/A 50% 0
0005 11 N/A N/A 0% 0
0006 11 N/A N/A 87% 0
0007 10 N/A N/A 87% 0
****************************************************
SSID=SUBSYSTEM IDENTIFIER
DEVS=NUMBER OF MANAGED DEVICES ATTACHED TO SUBSYSTEM
READ=PERCENT OF DATA ON MANAGED DEVICES ELIGIBLE FOR CACHING
WRITE=PERCENT OF DATA ON MANAGED DEVICES ELIGIBLE FOR FAST WRITE
HIT RATIO=PERCENT OF READS WITH CACHE HITS
FW BYPASSES=NUMBER OF FAST WRITE BYPASSES DUE TO NVS OVERLOAD
The storage system supports the following MVS cache operations:
• IDCAMS LISTDATA COUNTS. When the <system> parameter is used with the LISTDATA command,
the user must issue the command once for each SSID to view the entire storage system image. The
following shows a JCL example of the LISTDATA COUNTS command.
XP Disk Array Mainframe Host Attachment and Operations Guide 55