How to set optical drive speed

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The speed of the optical drive is set separately for CD-ROM and DVD, and is reset at reboot and resume from suspend.

CD-ROM: use

hdparm -E num

or

eject -x num

DVD: use

speedcontrol -x num

(sourcecode here).

For recent ThinkPad models running Linux kernels older than 2.6.15, this may require the libata pass-through patch.

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