Remove the check for more than one open if one is a write op. This allows using DVD+RW and DVD-RW as random storage, provided the 32K blocksize is honoured for DVD-RW (DVD+RW has built in read-modify-write).
Remove the check for more than one open if one is a write op.
This allows using DVD+RW and DVD-RW as random storage, provided
the 32K blocksize is honoured for DVD-RW (DVD+RW has built in
read-modify-write).

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