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Re: Question: Old Irix tape backup. Recovery on Linux (xfsdump/xfsrestor

To: Andrew Ho <andrewho@xxxxxxxxxxxxx>, Eric Sandeen <sandeen@xxxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
Subject: Re: Question: Old Irix tape backup. Recovery on Linux (xfsdump/xfsrestore)
From: Anthony l <Martinezant2141@xxxxxxxx>
Date: Fri, 1 Jul 2016 18:23:21 +0000
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Thread-topic: Question: Old Irix tape backup. Recovery on Linux (xfsdump/xfsrestore)

Thanks for the suggestions again. 

Still banging my head against a wall. 

So  I was trying a bunch of xfsrestore commands anything from -m -k -b to all three but still the same result every time. 

xfsrestore -K -m -b 4096 -f /dev/nst0 ./

xfsrestore  -K -r -f /dev/nst0 ./ 


I don't think this is a corrupt tape or anything because I have around 7 -10 tapes that are all made on the irix machine, but all behave the same. I have tried tar before but I get this is not a tar file or gzip file something like that. 

But I do have an observation. I had a tape (not made on the irix system) and I was able to pull a direct transfer of files with the dd command. i.e dd if=/dev/nst0 of=./somefile1 ibs =64k 

And I would only have to do this 3 -4 times to get like 30+ GBs of data off the tapes and a simple tar xvf command extracted these files just fine. But my question is how come when I try to do these with the tapes made on the Irix machine I only get about 200 mb at a time and there are like 190+ files on each tape. Is this normal for an xfs file system on a tape drive?


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