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

Open Source and information security mailing list archives

Date:	Sun, 25 Jan 2009 07:28:28 -0500 (EST)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	xfs@....sgi.com
Subject: Re: Switching from (deprecated) IDE driver -> SATA (PATA support)

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?

$ ls -l
total 0
lrwxrwxrwx 1 root root  9 2009-01-25 01:54 203fcd30-4e56-40e9-a8e5-93ddc8eb536a -> ../../md0
lrwxrwxrwx 1 root root 10 2009-01-25 01:54 2ef862e1-cf78-4065-a205-d1784716d633 -> ../../sdd1
lrwxrwxrwx 1 root root 10 2009-01-25 01:54 77ae4251-631f-4656-a365-c5723f5c5da8 -> ../../sdd2

p254:~# find /proc/|grep -i uuid
/proc/sys/kernel/random/uuid
p254:~# find /sys/|grep -i uuid 
p254:~#

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