[LinuxBIOS] sata issues on tyan s2891
ward at gnu.org
Mon Sep 24 22:41:28 CEST 2007
I finally got our tyan s2891 to boot LinuxBIOS (the ck804 chipset can't
emulate SATA disks as IDE, so you need linux-as-a-bootloader + kexec to make
it boot), but it turns out there are some issues with SATA.
This machine has 4 sata ports, to three of which a drive is connected. All
drives are identical.
I'm testing using a stock 18.104.22.168, 64 bit, no special boot parameters.
When booted into the proprietary BIOS, all three drives are properly and
swiftly detected during boot.
There is a bit of confusion: the Linux kernel sees sata controller 1 as the
second controller, and sata controller 2 as the first.
The drives are physically connected to sata controller 1 (drive 1,2) and sata
controller 2 (drive 3). Position 4 on sata controller 2 is empty.
The kernel sees the drives as controller 1 position 2, and controller 2 position
When booting with LinuxBIOS, only one of the drives is detected. (as it so
happens, drive 3 on sata controller 2). The drive in position 4 on controller
2 is half detected as you'll see in the logs - the drive type is read out,
but detection times out.
The drive at position 2 on controller 1 is not detected at all.
I have saved boot logs, lspci -vvvnx, lspci, lshw and x86info -mp output, all
of which you can find here:
The linuxbios boot log is somewhat complicated - you'll see the machine boots
a stripped-down 22.214.171.124 first (from rom, LAB), and then kexecs into a
The system does boot eventually, but only because those 3 drives happen to be
configured as software raid-1. It also takes a long time for the system to
come up, because the sata detection on the drive in position 4 times out for
Ward Vandewege <ward at fsf.org>
Free Software Foundation - Senior System Administrator
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