Mark Lord wrote:
Hi. I'm copying your posting for the linux-ide mailing list,
where the libata designers hang out.
Robert Wruck wrote:
Hi,
I'm having problems booting from a SATA disk with 2.6.19-rc2.
Grub loads fine, but when the kernel boots, it *sometimes* ends up with
VFS: Cannot open root device "sda5" or unknown-block(0,0)
The strange thing is that this happens only in 2/3 of the boot attempts.
If I reset the machine, the next attempt is likely to succeed.
I first noted this when switching from 2.6.17 (2.6.17.11, IIRC) to
2.6.18 and it persists in 2.6.19-rc2 (Windows does not encounter similar
problems on the same machine).
I attached a diff of a successful and an unsuccessful netconsole log
below. It seems that the drive is sometimes simply not detected...
I'm not using an initrd and changing the kernel command line from
root=/dev/sda5 to root=0x0805 did not help.
The controller is:
00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA
Controller (rev 03)
Any ideas? Please CC me, as I'm not subscribed.
Robert
Can you give a shot at the latest -mm (2.6.19-rc2-mm2)? It contains
device-detection-via-polling which is supposed to fix problems similar
to yours.
--
tejun
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