They are full pack over lays so that MAINT can see the whole disk. Used to be used to by the DIRECT(XA) command, to save (and backup) the CP NUCLEUS, to allow MAINT to format and areas used by CP for SPOOL and PAGING, and can also be used to DDRXA the whole system as a check point.
To be honest I can't say which (if any) of these are still needed. Dave Wade G4UGM Illegitimi Non Carborundum -----Original Message----- From: The IBM z/VM Operating System [mailto:[email protected]] On Behalf Of Martin, Terry R. (LOCKHEED MARTIN Performance Engineering/CTR) (CTR) Sent: 11 March 2009 22:07 To: [email protected] Subject: MDISK DEFINITION in MAINT DIRECTORY ENTRY Hi I did a DISKMAP USER DIRECTORY and while viewing the output I noticed that I had a few 'OVERLAYS'. In my MAINT directory entry I have the following: MDISK 122 3390 000 END 530SPL MR MDISK 123 3390 000 END 530RES MR MDISK 124 3390 000 END 530W01 MR MDISK 125 3390 000 END 530W02 MR MDISK 126 3390 000 END 530W03 MR Now, I reference these disks I other entries in the directory starting at location 001 for however many cylinders I need. As you can see the MDISK entries above start at 000 to END. The output from the DISKMAP shows the following: VOLUME USERID CUU DEVTYPE START END SIZE 530SPL $SPOOL$ B01 3390 00000 END ? MAINT 122 3390 00000 END ? *OVE 530W01 LNXADMIN 191 3390 00001 00100 00100 E49L021P 191 3390 00101 00102 00002 E49L054P 191 3390 00103 00104 00002 E49L124P 191 3390 00105 00106 00002 E49L046P 191 3390 00107 00108 00002 MAINT 124 3390 00000 END ? *OVE 530W02 E49L021P 910 3390 00001 00200 00200 E49L054P 910 3390 00201 00400 00200 E49L124P 910 3390 00401 00600 00200 E49L046P 910 3390 00801 01000 00200 MAINT 125 3390 00000 END ? *OVE I see what the problem is my question is do I need to have the entries for these disks in the MAINT directory entry? And what are the consequences if they are removed from the MAINT entry. This is the way the DIRECTORY was shipped on the install tape. Thanks for the help! Thank You, Terry Martin Lockheed Martin - Information Technology z/OS & z/VM Systems - Performance and Tuning Cell - 443 632-4191 Work - 410 786-0386 [email protected] Telecommuting on Fridays - Use my cell phone
