Wow this is old. I just saw the closing bug notification.
Sorry for not following up on this.
My excuse: I switched to new hardware a long time ago and I haven't seen this
problem ever again
on my new hardware with later Ubuntu versions.
Just to close with a tiny bit more info:
DMA (hdparm /dev/hdc) has always been set here (used to show as using_dma = 1
(on))
so the problem must have been elsewhere. Unfortunately, I no longer use that
old hardware
to record the full output of 'hdparm /dev/hdc'
As Chuck mentioned it may well have been a defective hardware/firmware.
Thanks, ariel
--
CD/DVD: hdc: packet command error: error=0x54 { AbortedCommand
LastFailedSense=0x05 }
https://bugs.launchpad.net/bugs/27472
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