Comment 7 for bug 231575

Some days ago, tired of not being able to use the devices fully, I've installed an extension SATA controller card based on the Sil 3114:
a similar problem showed up for some newly acquired SATA optical devices.

The problem seems to have disappeared after I've installed the extension card on a PCI slot with a reserved IRQ.

As the on-board SATA controller shares the IRQ with other devices on the motherboard, I'm asking myself if probably the problem is due to the ata driver not working properly with ATAPI devices on a controller in such configuration :/