On 11/06/2010 12:45 PM, Jan Ceuleers wrote:
> On 06/11/10 17:02, Phil Turmel wrote:
>> Indeed. The sysfs layout changed since kernel 2.6.18. I'm guessing the use of
>> CONFIG_SYSFS_DEPRECATED and/or CONFIG_SYSFS_DEPRECATED_V2 will interfere with my
>> script in current kernels.
>
> Nice.
>
> Output on one of my machines is however not as expected:
>
> Controller device @ pci0000:00/0000:00:1c.1/0000:02:00.0 [ahci]
> SATA controller: JMicron Technology Corp. JMB360 AHCI Controller (rev 02)
> host4: [Empty]
> Controller device @ pci0000:00/0000:00:1f.2 [ata_piix]
> IDE interface: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA IDE Controller (rev 06)
> host0: /dev/sda ATA WDC WD20EADS-00R {SN: WD-WCAVY4080404}
> host1: /dev/sdb ATA ST3500418AS {SN: 9VMK33L9}
> host1: /dev/sdc ATA ST3500418AS {SN: 9VMM6EY4}
> Controller device @ pci0000:00/0000:00:1f.5 [ata_piix]
> IDE interface: Intel Corporation 5 Series/3400 Series Chipset 2 port SATA IDE Controller (rev 06)
> host2: [Empty]
> host3: [Empty]
>
> This machine has seven SATA ports: one provided by the JMicron chip, the other six by the Intel H55 south bridge. Only three ports are currently used, but I had expected another [Empty] entry.
>
> Here's what's in /sys/devices:
>
> root@zotac:~# find /sys/devices/ -name scsi_host
> /sys/devices/pci0000:00/0000:00:1c.1/0000:02:00.0/host4/scsi_host
> /sys/devices/pci0000:00/0000:00:1f.2/host0/scsi_host
> /sys/devices/pci0000:00/0000:00:1f.2/host1/scsi_host
> /sys/devices/pci0000:00/0000:00:1f.5/host2/scsi_host
> /sys/devices/pci0000:00/0000:00:1f.5/host3/scsi_host
>
> Not sure what to make of that...
I'm guessing it's an artifact of IDE compatibility mode. You can see host1 reports two drives, and my script is only expecting one. Master vs. slave emulation, perhaps? Can you check your BIOS for legacy IDE vs. AHCI mode setting?
I suspect my script will have similar problems with port multipliers.
Phil
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