linux-kernel - Re: Switching from (deprecated) IDE driver -> SATA (PATA support)

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Message-ID: <49823F49.4000407@tmr.com>
Date:	Thu, 29 Jan 2009 18:44:09 -0500
From:	Bill Davidsen <davidsen@....com>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org, xfs@....sgi.com
Subject: Re: Switching from (deprecated) IDE driver -> SATA (PATA support)

Justin Piszcz wrote:
> 
> 
> On Sun, 25 Jan 2009, Bill Davidsen wrote:
> 
>> Justin Piszcz wrote:
>>>
>>>
>>> On Sun, 25 Jan 2009, Justin Piszcz wrote:
>>>
>>>>
>>>>
>>>> On Sun, 25 Jan 2009, Justin Piszcz wrote:
>>>>
>>>>>
>>>>>
>>>>> On Sun, 25 Jan 2009, Alan Cox wrote:
>>>>>
>>>>>> Easiest is to use labels. Old ide will keep hda,b,c,d constant
>>>>>> providing you have interfaces using the legacy IDE port mappings 
>>>>>> (0x1f0
>>>>>> and 0x170). Libata doesn't do that as pretty much every 
>>>>>> distribution had
>>>>>> already switched to volume labels, and the user space can do the 
>>>>>> job far
>>>>>> better than the kernel - especially as the newer devices with modern
>>>>>> interfaces don't have the old BIOS/DOS legacy ideas any more.
>>>>>>
>>>>>> Mount by label also means you can flip back and forth between the
>>>>>> different drivers and kernel revisions.
>>>>>>
>>>>>> Alan
>>>>>>
>>>> It comes with one :)
>>>> # xfs_admin -u  /dev/sdd2
>>>> UUID = 77ae4251-631f-4656-a365-c5723f5c5da8
>>>>
>>>> Will try to use this to boot; however, I'd prefer the labels over 
>>>> the UUID, wish there was an easy way to set it.
>>>>
>>>> Justin.
>>>>
>>>> _______________________________________________
>>>> xfs mailing list
>>>> xfs@....sgi.com
>>>> http://oss.sgi.com/mailman/listinfo/xfs
>>>>
>>>
>>> One final question, without udev, how does one determine the UUID of 
>>> a non-XFS
>>> partition, e.g., swap?
>>>
>> One uses blkid. Which suggests that you can solve your name problem by 
>> not using names and switching to UUID.
> 
> This will fix the /etc/fstab issue but not LILO/boot one, per the 
> earlier poster, need an initrd/etc for that.
> 
Good point, I have not used LILO since about Slackware 8.1, or any system w/o 
initrd in ages. I suppose there is a benefit to running without initrd, but I 
confess that I can't remember what it is. So I don't immediately consider the 
issues and limitations if you run without initrd.

Well I answered how to GET the UUID, he didn't ask me how to USE it. And I 
certainly didn't think of it, even though the info was there. :-(

-- 
Bill Davidsen <davidsen@....com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot
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