<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7652.24">
<TITLE>Questions regarding offsite disaster/recovery (from stacked drbd device)</TITLE>
</HEAD>
<BODY>
<!-- Converted from text/rtf format -->
<P><FONT SIZE=2 FACE="Arial">Hi list,</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">i've successfully implemented a three-node setup with an offsite node via drbd stacked-device as explained in the users-guide</FONT></P>
<P><FONT SIZE=2 FACE="Arial">( </FONT><A HREF="http://www.drbd.org/users-guide/s-pacemaker-stacked-resources.html"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">http://www.drbd.org/users-guide/s-pacemaker-stacked-resources.html</FONT></U></A><FONT SIZE=2 FACE="Arial"> )</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">the offsite drbd-device status is always 'secondary' because it has to stay in sync with the 'primary' (stacked) device managed by pacemaker crm.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">afaik 'secondary' devices cannot be mounted/accessed.</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">so, how can i access the offsite data, assumed all nodes in my ha-cluster failed?</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">how to handle the different states, the offsite-device can be in and how to do a recovery from it?</FONT>
<BR><FONT SIZE=2 FACE="Arial">i can think these:</FONT>
<BR><FONT SIZE=2 FACE="Arial"> - cs:WFConnection ro:Secondary/Unknown ds:UpToDate/DUnknown</FONT>
<BR><FONT SIZE=2 FACE="Arial"> - cs:WFConnection/Unknown ro:Secondary/Primary ds:Outdated/DUnknown</FONT>
<BR><FONT SIZE=2 FACE="Arial"> - cs:WFConnection/Unknown ro:Secondary/Primary ds:Consistent/DUnknown</FONT>
<BR><FONT SIZE=2 FACE="Arial"> - cs:WFConnection/Unknown ro:Secondary/Primary ds:Inconsistent/DUnknown</FONT>
</P>
<BR>
<P><FONT SIZE=2 FACE="Arial">is there a possibility to make the data on the offsite node permanently available (read only)?</FONT>
<BR><FONT SIZE=2 FACE="Arial"> e.g. so i can always 'clone' my production data to my test-environment from the state:</FONT>
<BR><FONT SIZE=2 FACE="Arial"> cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate</FONT>
</P>
<BR>
<P><FONT COLOR="#000000" SIZE=2 FACE="Arial">Mit freundlichen Grüßen / with kind regards</FONT>
</P>
<P><B><FONT COLOR="#000000" FACE="Arial">Torsten Schmidt</FONT></B>
</P>
</BODY>
</HTML>