Re: 2.6.20 libata cdrom

From: Tejun Heo
Date: Mon Apr 30 2007 - 15:50:54 EST


William Thompson wrote:
> I've been playing with libata on a few machines and I found that this machine
> (An old Dell Dimension L866r) gives me this when it loads and does not give me
> access to the cdrom. This is the only machine that I've tested that I know
> for a fact cannot do DMA on the cdrom. I searched and noticed a similar
> problem with 2.6.19-rc versions but I'm not sure if it's the same problem.
> dmesg output:
> libata version 2.00 loaded.
> ata_piix 0000:00:1f.1: version 2.00ac7
> PCI: Setting latency timer of device 0000:00:1f.1 to 64
> ata1: PATA max UDMA/66 cmd 0x1F0 ctl 0x3F6 bmdma 0xFFA0 irq 14
> ata2: PATA max UDMA/66 cmd 0x170 ctl 0x376 bmdma 0xFFA8 irq 15
> scsi0 : ata_piix
> ata1.00: ATA-4, max UDMA/33, 10018890 sectors: LBA
> ata1.00: ata1: dev 0 multi count 16
> ata1.00: configured for UDMA/33
> scsi1 : ata_piix
> ata2.00: failed to IDENTIFY (I/O error, err_mask=0x1)

Hmm... IDENTIFY failed on the second port. How reproducible is the
problem? Every time? Does it work with the IDE driver? If so, please
post the result of 'hdparm -I /dev/hdX'.


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