You might want to at least consider the possibility of multiple drives or other volume assignments: 

#! perl -slw
use strict;

my @vols = split "\n", `diskpart /s listvol.txt`;

print for @vols;

[download]

Where listvoe.txt contains: 

list volume

[download]

Will get you the volume list. You can then grep on /ROM/ and tease the line(s) apart to get the volume number.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
"I'd rather go naked than blow up my ass"

In reply to Re^5: How to change the drive letter for a CD/DVD drive on Windows? by BrowserUk
in thread How to change the drive letter for a CD/DVD drive on Windows <b>Update: with a script</b>? by matze77

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