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<p><tt><font size="2">Dan,</font></tt><br>
<br>
<tt><font size="2">A "new" GPFS should be able to mount and interact with file systems with "old" versions. Specifically I do not believe you will have trouble getting GPFS 3.5 to talk to an FS created on </font></tt><tt><font size="2">GPFS 3.3.0.2. </font></tt><br>
<br>
<tt><font size="2">The "Concepts, planning, and install guide" provides information about migrating to GPFS 4.1 from GPFS 3.2 or earlier; this would implies file systems created at GPFS 3.2 being supported on GPFS 4.1, which is even more compatibility than you are asking about. The section to which I refer is titled "</font></tt><tt><font size="2">Migrating to GPFS 4.1 from GPFS 3.2 or earlier releases of GPFS</font></tt><tt><font size="2">".</font></tt><br>
<br>
<tt><font size="2">Note that without running </font></tt><tt><font size="2">mmchfs -V {full|compat} </font></tt><tt><font size="2">you will not have access to some of the newer GPFS features. See the section titled "</font></tt><tt><font size="2">Completing the migration to a new level of GPFS</font></tt><tt><font size="2">", also in the concepts guide.</font></tt><br>
<br>
<tt><font size="2">Hope this helps,</font></tt><br>
<br>
<tt><font size="2">Jamie</font></tt><br>
<br>
<font size="2" face="sans-serif">Jamie Davis<br>
GPFS Functional Verification Test (FVT)<br>
jamiedavis@us.ibm.com</font><br>
<br>
<img width="16" height="16" src="cid:1__=0ABBF4A5DFD6B88C8f9e8a93df938@us.ibm.com" border="0" alt="Inactive hide details for Dan Foster ---29-04-2015 03:51:16 AM---Hi All, I'm trying to determine which versions of the GPFS fil"><font size="2" color="#424282" face="sans-serif">Dan Foster ---29-04-2015 03:51:16 AM---Hi All, I'm trying to determine which versions of the GPFS file system format</font><br>
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<font size="1" color="#5F5F5F" face="sans-serif">From: </font><font size="1" face="sans-serif">Dan Foster <Dan.Foster@bristol.ac.uk></font><br>
<font size="1" color="#5F5F5F" face="sans-serif">To: </font><font size="1" face="sans-serif">gpfsug main discussion list <gpfsug-discuss@gpfsug.org></font><br>
<font size="1" color="#5F5F5F" face="sans-serif">Date: </font><font size="1" face="sans-serif">29-04-15 03:51 AM</font><br>
<font size="1" color="#5F5F5F" face="sans-serif">Subject: </font><font size="1" face="sans-serif">[gpfsug-discuss] file system format version / software version compatibility matrix</font><br>
<font size="1" color="#5F5F5F" face="sans-serif">Sent by: </font><font size="1" face="sans-serif">gpfsug-discuss-bounces@gpfsug.org</font><br>
<hr width="100%" size="2" align="left" noshade style="color:#8091A5; "><br>
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<br>
<tt><font size="2">Hi All,<br>
<br>
I'm trying to determine which versions of the GPFS file system format<br>
are compatible with certain versions of the GPFS software.<br>
Specifically in this instance I'm interested if file system format<br>
v11.05 (from GPFS 3.3.0.2) is compatible with GPFS 3.5 .<br>
<br>
The "File system format changes between versions of GPFS" [1] chapter<br>
mentions format levels as old a v6, which infers that they are<br>
compatible. But it would be useful to know for certain.<br>
<br>
Thanks,<br>
Dan.<br>
<br>
[1] </font></tt><tt><font size="2"><a href="http://www-01.ibm.com/support/knowledgecenter/SSFKCN_3.5.0/com.ibm.cluster.gpfs.v3r5.gpfs100.doc/bl1adm_fsmigissues.htm?lang=en">http://www-01.ibm.com/support/knowledgecenter/SSFKCN_3.5.0/com.ibm.cluster.gpfs.v3r5.gpfs100.doc/bl1adm_fsmigissues.htm?lang=en</a></font></tt><tt><font size="2"><br>
-- <br>
Dan Foster | Senior Storage Systems Administrator | IT Services<br>
e: dan.foster@bristol.ac.uk | t: 0117 3941170 [x41170]<br>
m: Advanced Computing Research Centre, University of Bristol,<br>
8-10 Berkeley Square, Bristol BS8 1HH<br>
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