I followed your procedure,  still shows  10 Cylinders.  Here is what I did:

B e f o r e  mdisk change:
 q disk
LABEL  VDEV M  STAT   CYL TYPE BLKSZ   FILES  BLKS USED-(%) BLKS LEFT  BLK TOTAL
MNT191 191  A   R/W    10 3390 4096       74        856-48        944       1800
D991   991  C   R/W    10 3390 4096        0          7-00       1793       1800
D992   992  D   R/W    10 3390 4096        0          7-00       1793       1800
MNT190 190  S   R/O   207 3390 4096      694      18493-50      18767      37260
MNT19E 19E  Y/S R/O   500 3390 4096     1136      30522-34      59478      90000

rel d (det
DASD 0992 DETACHED

rel c
det 991
DASD 0991 DETACHED

< User Direct change & DIrectxa by MAINT620 >
MDISK 991 3390 746   20  M01W02  MR READ     WRITE    MULTIPLE  < - New
*MDISK 991 3390 746   10  M01W02  MR READ     WRITE    MULTIPLE < - Old
*MDISK 992 3390 756   10  M01W02  MR READ     WRITE    MULTIPLE < - Old

A f t e r   MDISK change:

link xecck6d 991 991 mr

q v 991
DASD 0991 3390 M01W02 R/W         20 CYL ON DASD  7F05 SUBCHANNEL = 0005

format 991 (recomp
DMSPCL386E Missing operand(s)
Ready(00024); T=0.01/0.01 11:26:51

format 991 20 (recomp
DMSPCL389E Invalid filemode: 20
Ready(00024); T=0.01/0.01 11:27:15

format 991 c 20 (recomp
DMSFOR069E Filemode C(991) not accessed
Ready(00036); T=0.01/0.01 11:27:34

acc 991 c
Ready; T=0.01/0.01 11:27:45

format 991 c 20 (recomp
LABEL  VDEV M  STAT   CYL TYPE BLKSZ   FILES  BLKS USED-(%) BLKS LEFT  BLK TOTAL
D991   991  C   R/W    10 3390 4096        0          7-00       1793       1800
Ready; T=0.01/0.01 11:27:59

q v 991
DASD 0991 3390 M01W02 R/W         20 CYL ON DASD  7F05 SUBCHANNEL = 0005
Ready; T=0.01/0.01 11:28:13

Joseph Vitale
Technology Services Group
Mainframe Operating Systems

Pershing Plaza
95 Christopher Columbus Drive
Floor 14   
Jersey City,  N.J.  07302
Work  201-395-1509
Cell    917-903-0102


-----Original Message-----
From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Rick Troth
Sent: Monday, February 02, 2015 10:39 AM
To: [email protected]
Subject: Re: Expanding CMS Mini Disk - DDR or Copyfile? - still not expanding

On 02/02/2015 09:42 AM, Vitale, Joseph wrote:
> I tried your approach, the number of cylinders never expanded. What I 
> did, all is on  CKD  IBM 3390-9 disk

Sorry for the confusion. I think they way I wrote that was a little hard to 
follow.

To reduce some of your effort, just DETACH and LINK rather than LOGOFF and 
LOGON.

Seeing you're using DIRECTXA, here is a recipe for in-place expand:

  * define 10 cyls after the existing minidisk, call it 992
  * DIRECTXA that update so CP knows about it
  * link to the 992 minidisk and FORMAT it (to get it blocked, in case
    it is not already)
  * detach the 992
  * redefine the 991 as 20 cyls, removing the temporary 992
    now 991 occupies all 20 cyls but starts at same as it did originally
  * DIRECTXA that so it's online and CP knows
  * release the 991 and detach it
  * re-link the 991 and access it
  * Q V 991 to confirm CP is giving you all 20 cyls
  * FORMAT (RECOMP


FORMAT (RECOMP should detect the number of cylinders it gets from CP and give 
you the full 20.

I HAVE NOT tested the above steps, but have tested FORMAT (RECOMP in similar 
change-up.

The only tricky part to expanding a minidisk in place is that the new storage 
must be blocked same as the existing cylinders.



--

Rick Troth
Senior Software Developer

Velocity Software Inc.
Mountain View, CA 94041
Main: (877) 964-8867
Direct: (614) 594-9768
[email protected] <mailto:[email protected]>

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