Hi Wahyu, I guess that the warnings related to FCoE are not that important. I forgot to mention, that the images of the virtual machines are on the physical server. Thanks & Regards, Peter On 03/01/2012 01:02 AM, Wahyu Darmawan wrote: > Hi Peter, > > I saw from your log message that you've lost connection to the storage device which you use in the server machine. My suggestion is please examine the connection between server and storage. > CMIIW. > > Rgds, > Wahyu > > > Powered by Telkomsel BlackBerry® > > -----Original Message----- > From: Peter Hopfgartner<peter.hopfgartner at r3-gis.com> > Sender: centos-virt-bounces at centos.org > Date: Wed, 29 Feb 2012 08:53:09 > To: Discussion about the virtualization on CentOS<centos-virt at centos.org> > Reply-To: Discussion about the virtualization on CentOS > <centos-virt at centos.org> > Subject: [CentOS-virt] Guests pausing suddenly > > We have a CentOS 6.2 server with KVM. That server hosts 2 virtual > machines, both with Centos 6.2, too. > > Regularly, one or both of the virtual machines pass to state "pause" > without apparent reason. > On resume, I do get have messages, like the following in /var/log/messages. > > Feb 28 21:50:45 achernar fcoemon: Failed to connect to lldpad > Feb 29 08:23:56 achernar kernel: sd 0:0:0:0: [sda] Unhandled error code > Feb 29 08:23:56 achernar kernel: sd 0:0:0:0: [sda] Result: > hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT > Feb 29 08:23:56 achernar kernel: sd 0:0:0:0: [sda] CDB: Write(10): 2a 00 > 06 db 70 78 00 00 38 00 > Feb 29 08:23:56 achernar kernel: end_request: I/O error, dev sda, sector > 115044472 > Feb 29 08:23:56 achernar kernel: Buffer I/O error on device dm-0, > logical block 14252047 > Feb 29 08:23:56 achernar kernel: lost page write due to I/O error on dm-0 > Feb 29 08:23:56 achernar kernel: Buffer I/O error on device dm-0, > logical block 14252048 > Feb 29 08:23:56 achernar kernel: lost page write due to I/O error on dm-0 > Feb 29 08:23:56 achernar kernel: Buffer I/O error on device dm-0, > logical block 14252049 > Feb 29 08:23:56 achernar kernel: lost page write due to I/O error on dm-0 > Feb 29 08:23:56 achernar kernel: Buffer I/O error on device dm-0, > logical block 14252050 > Feb 29 08:23:56 achernar kernel: lost page write due to I/O error on dm-0 > Feb 29 08:23:56 achernar kernel: Buffer I/O error on device dm-0, > logical block 14252051 > Feb 29 08:23:56 achernar kernel: lost page write due to I/O error on dm-0 > Feb 29 08:23:56 achernar kernel: Buffer I/O error on device dm-0, > logical block 14252052 > Feb 29 08:23:56 achernar kernel: lost page write due to I/O error on dm-0 > Feb 29 08:23:56 achernar kernel: Buffer I/O error on device dm-0, > logical block 14252053 > Feb 29 08:23:56 achernar kernel: lost page write due to I/O error on dm-0 > Feb 29 08:23:57 achernar fcoemon: error 111 Connection refused > > > I could not find any sensible message on the pysical host, neither in > /var/log/messages nor in /var/log/libvirt. > > We do have an almost identical server, same hardware, same software > which does not have this problem. > > How could I proceed to better diagnose the cause of the troubles? > > Regards, > -- Peter Hopfgartner R3 GIS Srl - GmbH Via Johann Kravogl-Str. 2 I-39012 Meran/Merano (BZ) web : www.r3-gis.com mail : peter.hopfgartner at r3-gis.com phone: +39 0473 494949 fax : +39 0473 069902 ATTENZIONE! Le informazioni contenute nella presente e-mail e nei documenti eventualmente allegati sono confidenziali. La loro diffusione, distribuzione e/o riproduzione da parte di terzi, senza autorizzazione del mittente è vietata e può violare il D. Lgs. 196/2003. In caso di ricezione per errore, Vogliate immediatamente informare il mittente del messaggio e distruggere la e-mail. ACHTUNG! Die in dieser Nachricht oder in den beigelegten Dokumenten beinhalteten Informationen sind streng vertraulich. Ihre Verbreitung und/oder ihre Wiedergabe durch Dritte ist ohne Erlaubnis des Absenders verboten und verstößt gegen das Legislativdekret 196/2003. Sollten Sie diese Mitteilung irrtümlicherweise erhalten haben, bitten wir Sie uns umgehend zu informieren und anschließend die Mitteilung zu vernichten. WARNING! This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden and could be against the law (D. Lgs. 196/2003)