Re: 2.6.20-rc6: known unfixed regressions (v2) (part 2)

[Jeff Garzik <jgarzik@pobox.com>]

Mike Christie wrote:
> Strangely, if I use the sata driver, then nero uses the sg driver
> (drivers/scsi/sg.c) instead of the block layer sg io code. But the sata
> code spits out:
> 
> Jan 29 12:03:21 madmax kernel: ata1.00: ATAPI check failed
> Jan 29 12:03:21 madmax kernel: ata1.00: exception Emask 0x0 SAct 0x0
> SErr 0x0 action 0x2 frozen
> Jan 29 12:03:21 madmax kernel: ata1.00: cmd
> a0/00:00:00:00:20/00:00:00:00:00/a0 tag 0 cdb 0xac data 808 in
> Jan 29 12:03:21 madmax kernel:          res
> 51/51:03:00:00:20/00:00:00:00:00/a0 Emask 0x3 (HSM violation)
> Jan 29 12:03:21 madmax kernel: ata1: soft resetting port
> Jan 29 12:03:21 madmax kernel: ATA: abnormal status 0xD0 on port 0x1F7
> Jan 29 12:03:21 madmax kernel: ata1.00: failed to IDENTIFY (I/O error,
> err_mask=0x2)
> Jan 29 12:03:21 madmax kernel: ata1.00: revalidation failed (errno=-5)

-5 == EIO


> Jan 29 12:03:21 madmax kernel: ata1: failed to recover some devices,
> retrying in 5 secs
> Jan 29 12:03:33 madmax kernel: ata1: port is slow to respond, please be
> patient (Status 0xd0)
> Jan 29 12:03:56 madmax kernel: ata1: port failed to respond (30 secs,
> Status 0xd0)
> Jan 29 12:03:56 madmax kernel: ata1: soft resetting port
> Jan 29 12:03:57 madmax kernel: ata1.00: configured for PIO4
> Jan 29 12:03:57 madmax kernel: ata1: EH complete


It's not critical for 2.6.20, since the default recommendation for PATA 
is still "use drivers/ide", but Alan Cox (and Tejun and me) should be 
aware of cases where drivers/ide works but libata does not.

So, if you could post some machine and .config info regarding this to 
linux-ide (CC'ing Alan), that would be appreciated.

	Jeff