On Wed, Jan 08, 2025 at 12:52:50PM +0000, Philip Pemberton wrote: > I'm trying to connect an old Iomega Zip 100 ATAPI to a B550-chipset Ryzen > system, to exchange files with an even older system. The Gigabyte B550 AORUS > ELITE AX V2 rev1.3 motherboard doesn't have any PATA ports, so I'm using a > SATA to PATA adapter. > > Sadly it will not work in the B550 system (Kernel 6.8.0-51-generic x86_64, > Linux Mint 21.3 based on Ubuntu 22.04). When I have the Zip drive connected, > I get the following in dmesg and the sd device never appears: > > ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300) > ata3.00: ATAPI: IOMEGA ZIP 100 ATAPI, 12.A, max PIO3, CDB intr, > DMADIR > ata3.00: applying bridge limits > ata3.00: configured for PIO0 > ata3.00: qc timeout after 5000 msecs (cmd 0xa0) > ata3.00: failed to clear UNIT ATTENTION (err_mask=0x5) Since we see that the drive name is printed, the ATAPI IDENTIFY command succeded (ATA_CMD_ID_ATAPI (0xA1)). The command that timed out is ATA_CMD_PACKET 0xA0, so a regular ATAPI command. The UNIT ATTENTION print is just from atapi_eh_clear_ua(), which seems to be called by ata_eh_recover() unconditionally for ATAPI devices, because they always need to clear UNIT ATTENTION after a reset: https://github.com/torvalds/linux/blob/v6.8/drivers/ata/libata-eh.c#L3232-L3234 But the reset is of course only triggered because a command has timed out. Kind regards, Niklas
