I logged perhaps the original service request on this but must admit we haven’t 
tried it of late as have worked around the issue.

From: [email protected] 
[mailto:[email protected]] On Behalf Of Knister, Aaron 
S. (GSFC-606.2)[COMPUTER SCIENCE CORP]
Sent: Thursday, 23 November 2017 4:21 PM
To: [email protected]
Subject: [gpfsug-discuss] tar sparse file data loss

Somehow this nugget of joy (that’s most definitely sarcasm, this really sucks) 
slipped past my radar:

http://www-01.ibm.com/support/docview.wss?uid=isg1IV96475


Anyone know if there’s a fix in the 4.1 stream?

In my opinion this is 100% a tar bug as the APAR suggests but GPFS has 
implemented a workaround. See this post from the tar mailing list:

https://www.mail-archive.com/[email protected]/msg04209.html


It looks like the troublesome code may still exist upstream:

http://git.savannah.gnu.org/cgit/tar.git/tree/src/sparse.c#n273

No better way to ensure you’ll hit a problem than to assume you won’t :)

-Aaron
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