Handling HAL implementation: storage.cdrom.write_speeds

Question

device.get('storage.cdrom.write_speeds')

This returns HAL list of ints, like:

[4284, 2342, 1202, 800]

How should these be handled, to recieve writing speed? Or better, how does one retrieve speeds for all media type burner can write: DVDs, CDs...

According to wikipedia, calculation should be: value/150 for normal CDs, value/172.3 for audio CDs, value/1.32MB for DVDs. Which one to apply?

Also HAL specification seems to be saying that returned list of ints has metric value of kb/s, even though it seems to be in kB/s

Answer 1

AH! HAL really pises me off. Looks like it caches settings for last inserted medium. So, before I had anything in my burner, output looked like this:

$ lshal | grep write_speeds
storage.cdrom.write_speeds = {'4234', '2822', '1764', '706'} (string list)

After I inserted blank DVD:

$ lshal | grep write_speeds
storage.cdrom.write_speeds = {'11080', '5540'} (string list)

Maybe it helps to someone, HAL #fail