linux-kernel - Re: 2.6.27.10: ata1.00: HPA detected: current 293044655, native 293046768

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Date:	Sat, 3 Jan 2009 08:15:52 -0500 (EST)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	Mark Lord <liml@....ca>
cc:	Robert Hancock <hancockr@...w.ca>, linux-ide@...r.kernel.org,
	linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: 2.6.27.10: ata1.00: HPA detected: current 293044655, native  
 293046768



On Wed, 31 Dec 2008, Mark Lord wrote:

> Robert Hancock wrote:
>> Justin Piszcz wrote:
>>> On one system, two Raptor 150s:
>>> 
>>> [    0.739402] ata1.00: HPA detected: current 293044655, native 293046768
> ..
>> Presumably somebody or something set up a host protected area on one drive 
>> and not the other.. I believe there are some utilities out there that can 
>> be used to disable the HPA and allow the full capacity to be used.
> ..
>
> "hdparm -N" can do this, temporarily or permanently.
> Get the latest version from Sourceforge, and see the manpage for details.
>
> -ml
>
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>

Just incase someone Google's this later on, this is what it looks like,
for my case:

The /dev/sda (first disk) is the one with the problem.

root@...ppix:~/hpa# hdparm -N /dev/sda

/dev/sda:
  max sectors   = 293044655/293046768, HPA is enabled
root@...ppix:~/hpa# hdparm -N /dev/sdb

/dev/sdb:
  max sectors   = 293046768/293046768, HPA is disabled
root@...ppix:~/hpa# hdparm -N p293046768 /dev/sda

/dev/sda:
  setting max visible sectors to 293046768 (permanent)
  max sectors   = 293046768/293046768, HPA is disabled
root@...ppix:~/hpa#

root@...ppix:~# hdparm -N /dev/sda

/dev/sda:
  max sectors   = 293046768/293046768, HPA is disabled
root@...ppix:~#

1. I backed up the volume of the RAID-1 array.
2. Failed out the disk with the problem.
3. Then ran the commands above.
4. Reboot back to the OS.
5. Re-add the disk back into the RAID-1.


Justin.

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