XFS on x86_64 Linux Question

XFS on x86_64 Linux Question

[Justin Piszcz]

Hello--

Had a quick question, if I re-provision a host with an Intel Core Duo CPU 
with x86_64 Linux; I create a software raid array and use the XFS 
filesystem-- all in 64bit space...

If I boot a recovery image such as Knoppix, it will not be able to work on 
the filesystem correct?  I would need a 64bit live CD?

Does the same apply to software raid?  Can I mount a software raid created 
in a 64bit environment in a 32bit environment?

Justin.

Re: XFS on x86_64 Linux Question

[Justin Piszcz]

With correct CC'd address.


On Sat, 28 Apr 2007, Justin Piszcz wrote:

> Hello--
>
> Had a quick question, if I re-provision a host with an Intel Core Duo CPU 
> with x86_64 Linux; I create a software raid array and use the XFS 
> filesystem-- all in 64bit space...
>
> If I boot a recovery image such as Knoppix, it will not be able to work on 
> the filesystem correct?  I would need a 64bit live CD?
>
> Does the same apply to software raid?  Can I mount a software raid created in 
> a 64bit environment in a 32bit environment?
>
> Justin.
>

Re: XFS on x86_64 Linux Question

[Raz Ben-Jehuda(caro)]

Justin hello
I have tested 32 to 64 bit porting of linux raid5 and xfs and LVM
it worked. though i cannot say I have tested throughly. it was a POC.

On 4/28/07, Justin Piszcz <jpiszcz@lucidpixels.com> wrote:
> With correct CC'd address.
>
>
> On Sat, 28 Apr 2007, Justin Piszcz wrote:
>
> > Hello--
> >
> > Had a quick question, if I re-provision a host with an Intel Core Duo CPU
> > with x86_64 Linux; I create a software raid array and use the XFS
> > filesystem-- all in 64bit space...
> >
> > If I boot a recovery image such as Knoppix, it will not be able to work on
> > the filesystem correct?  I would need a 64bit live CD?
> >
> > Does the same apply to software raid?  Can I mount a software raid created in
> > a 64bit environment in a 32bit environment?
> >
> > Justin.
> >
> -
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>


-- 
Raz

Re: XFS on x86_64 Linux Question

[Justin Piszcz]

Wow, probably better to stick with 32bit then?

On Sat, 28 Apr 2007, Raz Ben-Jehuda(caro) wrote:

> Justin hello
> I have tested 32 to 64 bit porting of linux raid5 and xfs and LVM
> it worked. though i cannot say I have tested throughly. it was a POC.
>
> On 4/28/07, Justin Piszcz <jpiszcz@lucidpixels.com> wrote:
>> With correct CC'd address.
>> 
>> 
>> On Sat, 28 Apr 2007, Justin Piszcz wrote:
>> 
>> > Hello--
>> >
>> > Had a quick question, if I re-provision a host with an Intel Core Duo CPU
>> > with x86_64 Linux; I create a software raid array and use the XFS
>> > filesystem-- all in 64bit space...
>> >
>> > If I boot a recovery image such as Knoppix, it will not be able to work 
>> on
>> > the filesystem correct?  I would need a 64bit live CD?
>> >
>> > Does the same apply to software raid?  Can I mount a software raid 
>> created in
>> > a 64bit environment in a 32bit environment?
>> >
>> > Justin.
>> >
>> -
>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>> 
>
>
> -- 
> Raz
>

RE: XFS on x86_64 Linux Question

[Daniel Korstad]

Short answer, yep, I have done it. 

 

I don't know exactly what you are looking for, or what tools you need. 
The follow is my very recent experience. 

 

I have a FC4  x86_64 that I have been using for awhile.  I have a
raided OS (raid 1on using the two separate IDE controllers) and raided data
drives (9 in a RAID6 on SATA controllers) 

 

I had replace the original OS drives with larger ones.  I wanted to take
the new larger drives’ capacity and put that in the ext3 fs on the raid 1. 

 

Last night I did this on the system; 

mdadm --grow /dev/md0 --size=max 

 

But I had older resize2fs, it does not support ext resize on a live mount
filesystem, and since this partition was my / partition... 

 

I rebooted my system with knoppix and did; 

 

mdadm --assemble /dev/md0 /dev/hda1 /dev/hdc1 

fsck.ext /dev/md0 

resize2fs /dev/md0 

 

And reboot back to operational without any problems. 

 

My data raid6 is on a XFS.  It support live filesystem expansion
(xfs_growfs while mounted).   I have not done anything with my xfs in
knoppix but I am sure some tools are in there too. 

 

This is not a thorough test of tools on knoppix on my 64bit system but from my
experience, I can boot into it and assemble my raid within it. 

 

Dan.


 

----- Inline Message Follows ----- 

To: xfs@oss.sgi.com 

Cc: linux-raid@vger.kernel.org 

From: Justin Piszcz 

Subject: Re: XFS on x86_64 Linux Question 

 


With correct CC'd address. 
 
 
On Sat, 28 Apr 2007, Justin Piszcz wrote: 
 
> Hello-- 
> 
> Had a quick question, if I re-provision a host with an Intel Core Duo CPU  
> with x86_64 Linux; I create a software raid array and use the XFS  
> filesystem-- all in 64bit space... 
> 
> If I boot a recovery image such as Knoppix, it will not be able to work on  
> the filesystem correct?  I would need a 64bit live CD? 
> 
> Does the same apply to software raid?  Can I mount a software raid created in  
> a 64bit environment in a 32bit environment? 
> 
> Justin. 
> 
- 
To unsubscribe from this list: send the line "unsubscribe linux-raid" in 
the body of a message to majordomo@vger.kernel.org 
More majordomo info at  http://vger.kernel.org/majordomo-info.html 
 

-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: XFS on x86_64 Linux Question

[Justin Piszcz]

On Sat, 28 Apr 2007, Andi Kleen wrote:

> Justin Piszcz <jpiszcz@lucidpixels.com> writes:
>
>> Had a quick question, if I re-provision a host with an Intel Core Duo
>> CPU with x86_64 Linux; I create a software raid array and use the XFS
>> filesystem-- all in 64bit space...
>>
>> If I boot a recovery image such as Knoppix, it will not be able to
>> work on the filesystem correct?  I would need a 64bit live CD?
>
> There used to be a XFS bug that 32bit journals couldn't
> be replayed on 64bit and vice versa. This means you couldn't mount
> a dirty file system on the other architecture. But this bug has been
> long fixed and mounting clean file systems always worked.
>
> -Andi
>

Thanks for the prompt reply!  I have more confidence in trying x86_64 now 
:)

Justin.

Re: XFS on x86_64 Linux Question

[Andi Kleen]

Justin Piszcz <jpiszcz@lucidpixels.com> writes:

> Had a quick question, if I re-provision a host with an Intel Core Duo
> CPU with x86_64 Linux; I create a software raid array and use the XFS
> filesystem-- all in 64bit space...
> 
> If I boot a recovery image such as Knoppix, it will not be able to
> work on the filesystem correct?  I would need a 64bit live CD?

There used to be a XFS bug that 32bit journals couldn't 
be replayed on 64bit and vice versa. This means you couldn't mount
a dirty file system on the other architecture. But this bug has been 
long fixed and mounting clean file systems always worked.

-Andi

RAID6 question

[Guy Watkins]

I read in processor.com that Adaptec has a RAID 6/60 that is patented.

Does Linux RAID6 have a conflict?

Thanks,
Guy

Adaptec also has announced a new family of Unified Serial (meaning 3Gbps
SAS/SATA) RAID controllers for PCI Express. Five models include cards with
four, eight, 12, and 16 internal ports, plus one groundbreaking SKU with
eight external ports and dual path failover. The new controllers support
RAIDs 0, 1, 5, 10, 50, 5EE, and the patented RAID 6/60, which Adaptec says
can survive two simultaneous drive failures. 
investor.adaptec.com/ReleaseDetail.cfm?ReleaseID=233555 
investor.adaptec.com/ReleaseDetail.cfm?ReleaseID=233556

http://www.processor.com/editorial/article.asp?article=articles%2Fp2912%2F02
p12%2F02p12.asp&guid=&searchtype=&WordList=&bJumpTo=True

http://tinyurl.com/2kdzcb

RE: RAID6 question

[Guy Watkins]

} -----Original Message-----
} From: linux-raid-owner@vger.kernel.org [mailto:linux-raid-
} owner@vger.kernel.org] On Behalf Of Guy Watkins
} Sent: Saturday, April 28, 2007 8:52 PM
} To: linux-raid@vger.kernel.org
} Subject: RAID6 question
} 
} I read in processor.com that Adaptec has a RAID 6/60 that is patented.
} 
} Does Linux RAID6 have a conflict?
} 
} Thanks,
} Guy
} 
} Adaptec also has announced a new family of Unified Serial (meaning 3Gbps
} SAS/SATA) RAID controllers for PCI Express. Five models include cards with
} four, eight, 12, and 16 internal ports, plus one groundbreaking SKU with
} eight external ports and dual path failover. The new controllers support
} RAIDs 0, 1, 5, 10, 50, 5EE, and the patented RAID 6/60, which Adaptec says
} can survive two simultaneous drive failures.
} investor.adaptec.com/ReleaseDetail.cfm?ReleaseID=233555
} investor.adaptec.com/ReleaseDetail.cfm?ReleaseID=233556
} 
} http://www.processor.com/editorial/article.asp?article=articles%2Fp2912%2F
} 02
} p12%2F02p12.asp&guid=&searchtype=&WordList=&bJumpTo=True
} 
} http://tinyurl.com/2kdzcb

No feedback.  Is no news good news?

RE: RAID6 question

[Neil Brown]

On Friday May 4, linux-raid@watkins-home.com wrote:
> } -----Original Message-----
> } From: linux-raid-owner@vger.kernel.org [mailto:linux-raid-
> } owner@vger.kernel.org] On Behalf Of Guy Watkins
> } Sent: Saturday, April 28, 2007 8:52 PM
> } To: linux-raid@vger.kernel.org
> } Subject: RAID6 question
> } 
> } I read in processor.com that Adaptec has a RAID 6/60 that is patented.
> } 
> } Does Linux RAID6 have a conflict?
> } 
> } Thanks,
> } Guy
> } 
> } Adaptec also has announced a new family of Unified Serial (meaning 3Gbps
> } SAS/SATA) RAID controllers for PCI Express. Five models include cards with
> } four, eight, 12, and 16 internal ports, plus one groundbreaking SKU with
> } eight external ports and dual path failover. The new controllers support
> } RAIDs 0, 1, 5, 10, 50, 5EE, and the patented RAID 6/60, which Adaptec says
> } can survive two simultaneous drive failures.
> } investor.adaptec.com/ReleaseDetail.cfm?ReleaseID=233555
> } investor.adaptec.com/ReleaseDetail.cfm?ReleaseID=233556
> } 
> } http://www.processor.com/editorial/article.asp?article=articles%2Fp2912%2F
> } 02
> } p12%2F02p12.asp&guid=&searchtype=&WordList=&bJumpTo=True
> } 
> } http://tinyurl.com/2kdzcb
> 
> No feedback.  Is no news good news?

No, no news is no news.
If someone has a patent, then that might be nice for them, but is of
little interest to me.

If anyone takes patent action against any one about any code in the
kernel (or elsewhere in widely used FLOSS code) then that is a concern
to lots of people and (providing it becomes know) I suspect that a
lot of people will take interest.

However unless and until that happens, my personal attitude to other
people's patents is that they aren't my problem.  BUGs are my problem
not patents.

NeilBrown