Hi, I'm experimenting with the libata-pata drivers in linux 2.6.19. So far it looks good, great job Alan! We obviously have some drives that due to their damaged nature have some funny behaviour. One of them is that some drives really don't like DMA mode anymore and can only be reliably recovered in PIO mode. With the old IDE drivers that was easy: hdparm -d 0 /dev/hda . Unfortunately I can't find a way to do the same with libata-pata. The libata-pata drivers have a set_piomode method that gets called in libata-core.c:ata_set_mode(), which is only called from the bus probe function and the exception handler. What is needed to force a drive into PIO mode from userspace? Erik -- +-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 -- | Lab address: Delftechpark 26, 2628 XH, Delft, The Netherlands - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html