Reallocating Diskette File Space - IBM 5110 User Manual

REALLOCATING DISKETTE FILE SPACE
Unlike tape files, when you re-mark an existing diskette file, no other
diskette files are affected. When you re-mark a diskette file to
increase the size, the file space presently allocated to that diskette file
is made available for other files being marked. The remarked file will
then be located on the diskette where there is enough continuous
storage available for that file. For example, assume you want to
increase the size of file 4 from 10K to 15K by issuing a )MARK 15 1 4
11 command:
Disk
Cylinder
3
After you issue the )MARK command
this file space is no longer allocated
for File 4.
5
Once the file space previously occupied by file 4 is available, that file
space will be used by a subsequent )MARK command that marks a file
of 10K or smaller.
After the )MARK command is successfully completed, file 4 is
formatted on the diskette at a location where at least 15K of
continuous storage is available.
Diskette
Cylinder
Another
Diskette
Cylinder
3
\
Unallocated Diskette Storage
/
4
IW.
20K of unallocated diskette storage was
available at this location before the
)MARK command was issued.
5
10
Diskette Concepts 89