On Mon, 19 Mar 2007 16:46:40 -0400
Jeff Garzik <jeff@xxxxxxxxxx> wrote:
> Stephen Hemminger wrote:
> > On Mon, 19 Mar 2007 11:01:37 -0400
> > Jeff Garzik <jgarzik@xxxxxxxxx> wrote:
> >
> >> Stephen Hemminger wrote:
> >>> This is a new drive, so I suspect some driver incompatibility between the
> >>> driver (AHCI) and the hard drive (WD Raptor 10K 74G).
> >> Driver incompatibilities between the driver (LLDD or libata-core) and a
> >> hard drive are extremely rare.
> >>
> >> The most common problem on modern SATA drives is drive firmware bugs, at
> >> the moment.
> >>
> >
> > I moved the drive to another machine with ICH7 and it seems to work fine
> > there. Strange?
>
> Does dmesg reflect any difference in AHCI version or PHY speed, on
> either machine? Did you use the same cables in both tests?
>
> AHCI version ("0001.0100" == AHCI 1.1):
> ...
> ahci 0000:00:1f.2: AHCI 0001.0100 32 slots 4 ports 3 Gbps 0xf impl SATA mode
> ...
On the good machine:
[ 30.728849] ata1: SATA max UDMA/133 cmd 0x000000000001e400 ctl 0x000000000001e082 bmdma 0x000000000001d880 irq 23
[ 30.890918] ata1.00: ATA-7: WDC WD740ADFD-00NLR1, 20.07P20, max UDMA/133
[ 30.890966] ata1.00: 145226112 sectors, multi 16: LBA48 NCQ (depth 0/32)
[ 30.900957] ata1.00: configured for UDMA/133
Maybe since AHCI isn't enabled in the BIOS on the good machine,
we aren't doing NCQ?
> PHY configuration and speed:
> ...
> ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> ...
>
> SATA headers (ports) on the motherboard and SATA cables are known to be
> weak links in the chain, commonly.
I tried a port and cable swap on the bad machine. The good machine
had a new cable, so it still could be the cable.
--
Stephen Hemminger <shemminger@xxxxxxxxxxxxxxxxxxxx>
-
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
