<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style></style></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><div>Q: Can I reboot one node in a two-node cluster and have it rejoin the cluster?<o:p></o:p><o:p> </o:p>I’ve a two-node cluster which recently had HBAs replaced on both cluster nodes.<o:p></o:p>Node 1 was ejected sometime after its latest reboot, and now won’t mount its OCFS volumes. The volumes’ headers are verified from n1, i.e., it can see the volumes, but mounting fails. Restarting o2cb yields “modprobe: FATAL: Module ocfs2_stackglue not found.”<o:p></o:p><o:p> </o:p>I want to reboot n1 IFF this will have it rejoin the cluster – unless there’s another way to have n1 rejoin the cluster w/o reboot.<o:p></o:p><o:p> </o:p>Status for n1:<o:p></o:p>n1# service o2cb status<o:p></o:p>Driver for "configfs": Loaded<o:p></o:p>Filesystem "configfs": Mounted<o:p></o:p>Driver for "ocfs2_dlmfs": Loaded<o:p></o:p>Filesystem "ocfs2_dlmfs": Mounted<o:p></o:p>Checking O2CB cluster ocfs2: Online<o:p></o:p>Heartbeat dead threshold = 61<o:p></o:p> Network idle timeout: 30000<o:p></o:p> Network keepalive delay: 2000<o:p></o:p> Network reconnect delay: 2000<o:p></o:p>Checking O2CB heartbeat: Not active<o:p></o:p>n1#<o:p></o:p><o:p> </o:p>Status for n2:<o:p></o:p>n2# service o2cb status<o:p></o:p>service o2cb status<o:p></o:p>Driver for "configfs": Loaded<o:p></o:p>Filesystem "configfs": Mounted<o:p></o:p>Driver for "ocfs2_dlmfs": Loaded<o:p></o:p>Filesystem "ocfs2_dlmfs": Mounted<o:p></o:p>Checking O2CB cluster ocfs2: Online<o:p></o:p>Heartbeat dead threshold = 61<o:p></o:p> Network idle timeout: 30000<o:p></o:p> Network keepalive delay: 2000<o:p></o:p> Network reconnect delay: 2000<o:p></o:p>Checking O2CB heartbeat: Active<o:p></o:p>n2# <o:p></o:p></div></div></body></html> This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase & Co., its subsidiaries and affiliates. This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. Please refer to http://www.jpmorgan.com/pages/disclosures for disclosures relating to European legal entities.