It may be that due to the dynamic nature of TDISK allocation, 240
contiguous cylinders are not available.  Consider the following example
based on a 100 cylinder TDISK area:

1) User A allocates 25 cylinders - 75 cylinders free (cyls 0-24 allocated,
25-99 free)
2) User B allocates 25 cylinders - 50 cylinders free (cyls 0-49 allocated,
50-99 free)
3) User C allocates 25 cylinders - 25 cylinders free (cyls 0-74 allocated,
75-99 free)
4) User B gives up his 25 cylinders - 50 cylinders free (cyls 0-24 and
50-74 allocated, 25-49 and 75-99 free)
5) User D attempts to allocate 50 cylinders and cannot, because 50
contiguous cylinders are not available.
6) User D allocates 25 cylinders, and gets it (cyls 0-74 allocated, 75-99
free)
7) User D allocates 25 cylinders, and gets it (cyls 0-99 allocated, 0 free)

Regards,
Bill Stephens
Sr. Technology Analyst, High Availability
SunGard Availability Services
10th floor
401 North Broad Street
Philadelphia, PA 19108
Phone: (215) 351-1099
Fax: (215) 451-2045
[EMAIL PROTECTED]
___________________________________________
Keeping People and Information Connected (TM)
http://www.availability.sungard.com



                                                                           
             Mary Zervos                                                   
             <[EMAIL PROTECTED]                                             
             n.edu>                                                     To 
             Sent by: VM/ESA           [email protected]           
             and z/VM                                                   cc 
             Discussions                                                   
             <[EMAIL PROTECTED]                                     Subject 
             .UARK.EDU>                Tdisk question                      
                                                                           
                                                                           
             01/24/2006 09:17                                              
             AM                                                            
                                                                           
                                                                           
             Please respond to                                             
              VM/ESA and z/VM                                              
                Discussions                                                
             <[EMAIL PROTECTED]                                             
                .UARK.EDU>                                                 
                                                                           
                                                                           




I have 500 cyl. of tdisk defined on one pack and 50 cyl. of tdisk
defined on another.  One user used the 50 cyl. on the second pack  and
about 24 users have used 215 cyl.(43%used) on the first pack.  Why is it
that I can only allocate a 130 cyl. maximum tdisk on the first pack but
can then go ahead and allocate a 110 cyl. tdisk, instead of being able
to allocate *one* 240 cyl. tdisk?

Thanks for any help.

Mary Zervos
VM Systems Programmer
Binghamton University
[EMAIL PROTECTED]

Reply via email to