Gee, I've been doing it the hard way! ;-)
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]
David Kreuter
<[EMAIL PROTECTED]
urces.com> To
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and z/VM cc
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<[EMAIL PROTECTED] Subject
.UARK.EDU> Re: DASD map tool?
10/28/2005 09:04
AM
Please respond to
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Discussions
<[EMAIL PROTECTED]
.UARK.EDU>
IEBIBALL only works in z/OS. We use VMFIBALL.
David
Bill Stephens wrote:
>Dave Kreuter wrote "I agree that a 1 cylinder scan is quite useful. I've
>used it myself.
>There are times though where a successful CMS access could be
>misleading. Any disk that was recomped such as the 190 will return
>incorrect results. It is also possible that a minidisk that has been
>deleted will still show up with its cylidner 1 intact potentially
>pointing at garbage. Just be aware of this and a DISCOVER tool is still
>quite effective.".
>
>This is quite correct. Usually, there will be a gap evident in the map
>file following the 190 disk, which +may+ give you a clue as to the correct
>size of the 190 mdisk (e.g., if in the directory, the 190 minidisk is
>immediately followed by another minidisk, then the ACCESS reported size
>plus the gap size is the true size). But that's only if there is no
actual
>gap between 190 and the next minidisk in the directory.
>
>Another issue that DISCOVER can't detect is when disks get "overlaid".
>Consider:
>
>1) user "A" has a minidisk allocated at cylinder 100 for 10 cylinders
>2) user "B" has a minidisk allocated at cylinder 105 for 4 cylinders
>(never mind how or why)
>
>In this case, DISCOVER will report that there is a minidisk at cylinder
100
>for 10 cylinders, and another minidisk at cylinder 105 for 4 cylinders.
>
>That's why the best use of DISCOVER is in conjunction with IEBIBALL.
>
>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]
>
>
>
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