[Lustre-discuss] Lost Files - How to remove from MDT

[Lundgren, Andrew]

I was also going to recommend the unlink.

We have had to do this as well, the unlink worked for us.  It did need to be run with privileges for the file.  (root in our case.)

--
Andrew

-----Original Message-----
From: lustre-discuss-bounces at lists.lustre.org [mailto:lustre-discuss-bounces at lists.lustre.org] On Behalf Of Andreas Dilger
Sent: Sunday, April 18, 2010 11:14 AM
To: Charles Taylor
Cc: Lustre User Discussion Mailing List
Subject: Re: [Lustre-discuss] Lost Files - How to remove from MDT

On 2010-04-18, at 07:16, Charles Taylor wrote:
> On Apr 18, 2010, at 9:35 AM, Miguel Afonso Oliveira wrote:
>> You are going to have to use "unlink" with something like this:
>>
>> for file in lost_files
>> 	unlink $file
>
> Nope.   That's really no different than "rm" and produces the same  
> result...
>
> unlink /scratch/crn/bwang/NCS/1O5P/1o5p_wat.prmtop
> unlink: cannot unlink `/scratch/crn/bwang/NCS/1O5P/1o5p_wat.prmtop':  
> Invalid argument

This surprises me that "unlink" doesn't work, since that is the answer  
I was going to give also.  Did you also verify that after this message  
is posted, that the file isn't actually unlinked?  I suspect that the  
file name was unlinked, but an error is returned from destroying the  
OST object, but that is fine since the OST is dead and gone anyway.

What error messages are posted on the console log (dmesg/syslog)?

Cheers, Andreas
--
Andreas Dilger
Principal Engineer, Lustre Group
Oracle Corporation Canada Inc.

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