Jeff,
I have a Dell Poweredge 750 with a pair of Maxtor 250GB SATA drives
running Fedora Core 1 + upgrades to support 2.6.
The Dell BIOS configures the controller in combined mode.
Kernel 2.6.7-bk5 boots, while 2.6.7-bk6,bk12 generate the following
timeout (copied by hand):
ata_piix: combined mode detected
ACPI: PCI interrupt 0000:1f.2[A]: no GSI
ata: 0x1f0 IDE port busy
ata1: SATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xFEA8 irq 15
ata1: dev 0 ATA, max UDMA/133 488281250 sectors: lba48
ata1: dev 1 ATA, max UDMA/133 488281250 sectors: lba48
ata1: dev0 configured for UDMA/133
ata1: dev1 configured for UDMA/133
scsi0: ata_piix
Vendor: ATA Model: Maxtor 7Y250M0 Rev: YAR5
Type: Direct Access ANSI SCSI revision: 05
SCSI device sda: 488281250 512-byte hdwr sectors (250000MB)
SCSI device sda: drive cache: write back
sda:<3>ata1: command 0x25 timeout, stat 0xd0 host_stat 0x64