Sometimes a useful trick is to change the input line separator ($/ - perlvar). Consider:
use strict;
use warnings;
local $/ = 'Pseudo name=';
/^(\w*).*?Logical device ID=(\w*)/s and print "$1, $2\n" while <DATA>;
__DATA__
Pseudo name=hdiskpower97
Symmetrix ID=000187751303
...
given all the samples data prints:
hdiskpower97, 0380
hdiskpower90, 0381
Perl is environmentally friendly - it saves trees
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