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]> > 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]] *On > Behalf Of *Wandschneider, Scott > *Sent:* Tuesday, September 15, 2009 2:53 PM > > *To:* [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]] *On > Behalf Of *Scott Rohling > *Sent:* Tuesday, September 15, 2009 4:50 PM > *To:* [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]> 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 > > Confidentiality Note: This e-mail, including any attachment to it, may > contain material that is confidential, proprietary, privileged and/or > "Protected Health Information," within the meaning of the regulations under > the Health Insurance Portability & Accountability Act as amended. If it is > not clear that you are the intended recipient, you are hereby notified that > you have received this transmittal in error, and any review, dissemination, > distribution or copying of this e-mail, including any attachment to it, is > strictly prohibited. If you have received this e-mail in error, please > immediately return it to the sender and delete it from your system. Thank > you. > > > > -- Kris Buelens, IBM Belgium, VM customer support
