libata and software RAID

[Oliver Tennert <tennert@science-computing.de>]

Hello Jeff (and others),

I am currently running a 2.6.9 kernel on my system, and everything's fine,
 but for a little issue:

I have an ASUS A7N8X Deluxe board with on-board nforce2-chipset and a SiS
S-ATA controller.

Previously, my two S-ATA drives had been driven by the IDE driver, and were
assembled to a  RAID-1 MD device (via software RAID) on them.

Now, with 2.6.9, the libata driver takes over, and my md device seems no
longer present (booting to an older 2.6.5 kernel, however, makes them visible
again). The IDE driver seems not to probe for the S-ATA drives in the first
hand:

<dmesg>
NFORCE2: IDE controller at PCI slot 0000:00:09.0
NFORCE2: chipset revision 162
NFORCE2: not 100% native mode: will probe irqs later
NFORCE2: 0000:00:09.0 (rev a2) UDMA133 controller
    ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:DMA
    ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:DMA, hdd:DMA
Probing IDE interface ide0...
Probing IDE interface ide1...
...
...
libata version 1.02 loaded.
sata_sil version 0.54
ACPI: PCI interrupt 0000:01:0b.0[A] -> GSI 18 (level, high) -> IRQ 209
ata1: SATA max UDMA/100 cmd 0xF909A080 ctl 0xF909A08A bmdma 0xF909A000 irq
 209 ata2: SATA max UDMA/100 cmd 0xF909A0C0 ctl 0xF909A0CA bmdma 0xF909A008
 irq 209 usb 1-2: new low speed USB device using address 3
ata1: dev 0 cfg 49:2f00 82:7c6b 83:7f09 84:4003 85:7c69 86:3e01 87:4003
88:207f
ata1: dev 0 ATA, max UDMA/133, 398297088 sectors: lba48
ata1: dev 0 configured for UDMA/100
scsi1 : sata_sil
ata2: dev 0 cfg 49:2f00 82:7c6b 83:7f09 84:4003 85:7c69 86:3e01 87:4003
88:207f
ata2: dev 0 ATA, max UDMA/133, 490234752 sectors: lba48
ata2: dev 0 configured for UDMA/100
scsi2 : sata_sil
  Vendor: ATA       Model: Maxtor 6Y200M0    Rev: YAR5
  Type:   Direct-Access                      ANSI SCSI revision: 05
SCSI device sdc: 398297088 512-byte hdwr sectors (203928 MB)
</dmesg>

Can you tell me how I either
a) am able to "import" the RAID-1 md device, the meta-information of which is
now located on SCSI drives, or
b) tell the IDE driver to probe the S-ATA bus and tell the libata driver to
NOT drive my S-ATA drives?

The other question is: libata seems to activate UDMA/100 for my S-ATA drives,
although they are able to run with UDMA/133. "hdparm" does not work with SCSI
drives, in this case. Can I tell libata to activate UDMA/133?

Many thanks for your help and best regards

Oliver Tennert

__
________________________________________creating IT solutions

Dr. Oliver Tennert   science + computing ag
phone   +49(0)7071 9457-598  Hagellocher Weg 71-75
fax     +49(0)7071 9457-411  D-72070 Tuebingen, Germany
O.Tennert@science-computing.de  www.science-computing.de

-------------------------------------------------------

-- 
__
________________________________________creating IT solutions

Dr. Oliver Tennert			science + computing ag
phone   +49(0)7071 9457-598		Hagellocher Weg 71-75	
fax     +49(0)7071 9457-411		D-72070 Tuebingen, Germany
O.Tennert@science-computing.de		www.science-computing.de