please revert critical patch

[Tim Gardner]

realKano at directbox.com wrote:
> This is critical:
> 
> http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-jaunty.git;a=commit;h=0d3c04214230d4340345a7a5d5353883b3299d9f
> 
> 
> If HPA is disabled then my raid (via dmraid) does not work. Even
> worse, on a normal reboot without full poweroff i see only offline
> members of my raid. That's definitely not expected this way.
> 
> Best solution: tell people the correct override option if they need
> it - usually they don't need it if they set the jumpers correctly on
> the harddrive. When dmesg|grep HPA shows a 32 GB limit then it clear
> that those jumpers are wrongly set which limit the hd size.
> 
> Also new Gigabyte boards store a BIOS backup at the end of the drive
> and set then HPA. Would be no good idea if this space is reused and
> then overritten.
> 
> 
> 
> 

At the same time the kernel module default was changed, the modprobe
option was removed. The net effect is 'no change', e.g., Jaunty
continues to ignore HPA. In fact, the default has been to ignore HPA
since Feisty (IIRC).

You can always use a command line boot option for Jaunty:
libata.ignore_hpa=0

rtg
-- 
Tim Gardner tim.gardner at canonical.com