Hi everybody!
For those who would like to have the AHCI option in the bios enabled
(for parallel Vista for example) rather than "IDE mode":
I found out that it is also possible to use the libata option
"force=noncq". It may be implemented under Debian (and Ubuntu perhaps
too, I don't have it so please verify) by adding the line
libata force=noncq
to the file "/etc/initramfs-tools/modules" and then doing a
"update-initramfs -u".
Further more I created a new file "options.conf" in the directory
"/etc/modprobe.d" with the line
options libata force=noncq
in it and then rebooted. My linux then booted without the mysterious
SATA errors in AHCI mode. I have a Hitachi Disk HTS545032B9A300 in my 3810T.
I don't know which option is better "libata noacpi=1" or "libata
force=noncq". Found the clue for disabling NCQ on a website:
http://lkml.indiana.edu/hypermail/linux/kernel/0706.1/0237.html
.Probably not all hard disk drives support the NCQ (Native command
queuing, see Wikipedia
http://en.wikipedia.org/wiki/Native_command_queuing). If someone knows
more, thanks for telling me.
Remark: For adding the kernel boot parameters it did not work for me to
just add "libata.force=noncq" or "libata.noacpi=1" to the grub
parameters. It did not recognize the option and ignored it. This is why
I did the "more complicated" way described above, works also if you
prefer using the noacpi=1 variant.
Best regards
Alex
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