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RE: SGI Version 1 XFS on Linux

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: RE: SGI Version 1 XFS on Linux
From: "Scott, Edmund J @ SSG - Link" <edmund.scott@xxxxxxxxxx>
Date: Wed, 6 May 2015 22:38:14 +0000
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Cc: Ben Myers <bpm@xxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
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In-reply-to: <20150506215816.GE4327@dastard>
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Thread-index: AdCIDxpplU8CdHWQQXuPofGKd7w1IgAOp8YAAAXQpjAABCt/AAAJtalw
Thread-topic: SGI Version 1 XFS on Linux
Hi,

Yep, you are right in that it is the directory version not the filesystem 
version. We are rapidly coming to the same conclusion about figuring a way to 
connect to an SGI box to get the info off. The drives are from the Onyx 
Stampede drive system that uses the high voltage SCSI, so it's kind of tough to 
interface to. We'll have to figure out if it is worth it. I think we might have 
some tapes around that may have the info. The tape part we already have figured 
out, it's just the drives would have been faster.

Oh well, where's my hammer.......

Thanks for the info, If I figure something out, I'll pass it along,
Ed


-----Original Message-----
From: Dave Chinner [mailto:david@xxxxxxxxxxxxx] 
Sent: Wednesday, May 06, 2015 3:58 PM
To: Scott, Edmund J @ SSG - Link
Cc: Ben Myers; xfs@xxxxxxxxxxx
Subject: Re: SGI Version 1 XFS on Linux

On Wed, May 06, 2015 at 07:47:51PM +0000, Scott, Edmund J @ SSG - Link wrote:
> Hi,
> 
> We are in a thunderstorm right now so we had to shut down, be a while 
> until we get things back up. We're in Utah with a rolling t-storm 
> coming through.
> 
> We did find documentation that XFS version 1 was pulled out of the 
> linux kernel around or after kernel 2.4. and the messages kind of 
> support that. I'm looking into digging up an old Red Hat OS to see if 
> it is old enough to have the version 1 XFS in it.

You'd be talking about the directory version, then, not the version of the 
filesystem? Irix 6.2 introduced Version 4 filesystems, but version 2 
directories didn't come along until a couple of years later. See Slides 6-7 
here:

http://events.linuxfoundation.org/sites/events/files/slides/dchinner-xfs-there-and-back.pdf

As it is, the dirv1 removal commit says "Never functioned on Linux, just pure 
bloat".

http://oss.sgi.com/cgi-bin/gitweb.cgi?p=archive/xfs-import.git;a=commitdiff;h=b84149405b9c2ecbc445d2684053e4acc03342ee

So I suspect that the only way you are going to be able to read those 
filesystems is with an Irix machine....

> While it was up, we've done the blkid command and it recognizes at 
> least 1 partition on the SGI drive to be xfs, others were efs. We also 
> used the hardware browser and got the same readings.

Yeah, that's old ;)

> We've also tried to make a disk image. If I try to mount the image on 
> the linux computer, it will essentially give me the same error about 
> version 1 xfs. Not that this was unexpected, it should error out just 
> like the drive did. I also happen to have an O2 up and running, so I 
> copied the image over to the O2 expecting to try and mount the image 
> so it would/should automatically handle the xfs issue, but it looks 
> like the O2 mount command does not have the loop or knows how to 
> handle mounting an image like the Linux does.

http://www.nekochan.net/wiki/Loopback_Filesystems

Nekochan is the place to go for information about old SGI boxes.
It might be worth posting there to see if there is anyone local to you with 
working hardware that would enable you to pull the information off the disks....

Cheers,

Dave.
--
Dave Chinner
david@xxxxxxxxxxxxx

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