The command is probably DRAIN rather than STOP, is it not? START reverses the 
DRAIN.


Regards,
Richard Schuh





________________________________
From: The IBM z/VM Operating System [mailto:[email protected]] On Behalf 
Of Kris Buelens
Sent: Tuesday, September 15, 2009 11:44 PM
To: [email protected]
Subject: Re: Adding TDISK

You use STOP to avoid new stuff gets placed on the affected disk (TDISK, Page, 
Spool).  When new stuff is welcome again, you use START.  To have CP read the 
allocation map, an ATTACH to SYSTEM needs to be done, and that's impossible 
when the disk is still attached to SYSTEM.

2009/9/16 Schuh, Richard <[email protected]<mailto:[email protected]>>
The question is, can you start a disk that is al;ready started. Earlier 
discussions seemed to say that the allocation map is only read when the disk is 
attached to system. That would indicate that the START  command would be 
ineffective at increasing the amount of TDISK on an already started device.


Regards,
Richard Schuh





________________________________
From: The IBM z/VM Operating System 
[mailto:[email protected]<mailto:[email protected]>] On Behalf Of 
Wandschneider, Scott
Sent: Tuesday, September 15, 2009 2:53 PM

To: [email protected]<mailto:[email protected]>
Subject: Re: Adding TDISK


I thought a "START" disk command would do just that, reread the allocation - 
No?  Just start a drain volume?



Thank you,



Scott



From: The IBM z/VM Operating System 
[mailto:[email protected]<mailto:[email protected]>] On Behalf Of 
Scott Rohling
Sent: Tuesday, September 15, 2009 4:50 PM
To: [email protected]<mailto:[email protected]>
Subject: Re: Adding TDISK



Unfortunately - I don't believe you can get zVM to reread the allocation table 
unless you detach/attach..  which you obviously can't do with your SYSRES..  so 
you'd have to re-IPL to get VM to see it...

Scott

On Tue, Sep 15, 2009 at 3:37 PM, Wandschneider, Scott 
<[email protected]<mailto:[email protected]>>
 wrote:

How I "start" TDISK?  The following is the procedure I followed.  Any
help is appreciated.  Thanks.

I did a CPFMTXA ALLOCATE on my 54BRES volume with the following command:

CPFMTXA 123 54BRES ALLOCATE
TDISK 1325.600
END

Result:
         CYLINDER ALLOCATION CURRENTLY IS AS FOLLOWS:
         TYPE     START      END        TOTAL
         ----     -----      ---        -----
         PERM     0          0          1
         DRCT     1          20         20
         PERM     21         38         18
         PARM     39         158        120
         PARM     159        278        120
         PARM     279        398        120
         PERM     399        1324       926
         TDSK     1325       1924       600
         PERM     1925       3338       1414

I have issued the following:

sta dasd 891a TDISK

Command complete

<MAINT AT Z800ZVM > Ready; T=0.01/0.01 17:33:38

q alloc

DASD 891A 54BRES 3390 CKD-ECKD (UNITS IN CYLINDERS)

    TDISK TOTAL=00000000000 INUSE=00000000000 AVAIL=00000000000

    PAGE  TOTAL=00000000000 INUSE=00000000000 AVAIL=00000000000

    SPOOL TOTAL=00000000000 INUSE=00000000000 AVAIL=00000000000

    DRCT  TOTAL=00000000020 INUSE=00000000001 AVAIL=00000000019, ACTIVE



Thank you,
Scott R Wandschneider

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--
Kris Buelens,
IBM Belgium, VM customer support

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