<br><br><div><span class="gmail_quote">On 7/24/07, <b class="gmail_sendername">Lars Ellenberg</b> <<a href="mailto:lars.ellenberg@linbit.com">lars.ellenberg@linbit.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
please, when posting to mailing lists,<br>do use text/plain mail.<br><br>On Tue, Jul 24, 2007 at 09:07:23AM +0200, caubert wrote:<br>><br>> Hi list,<br>> I have got a serious problem with drbd-0.7.21-1 between two server
<br>> installed with Suse Linux Enterprise Server 9 SP3.<br>> Sometime synchronization is down and `cat /proc/drbd`show this errors<br>> : "ServerForDLess" and "DiskForDLess"<br><br>if you had looked into the kernel log,
<br>you had seen the io subsystem report io errors.</blockquote><div><br>What in his /proc/drbd output specifically points that out? <br><br>BTW - I'm following your thread on the linux kernel list - Though I don't have any pull there, I did plug drbd on kerneltrap :-)
<br><br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">your hard drive is broken.<br><br>unfortunatley, sometimes it cannot<br>cope with failing hardware gracefully, and gets stuck...
<br><br>one typical operating system behaviour in presence of io errors<br>is to become unresponsive... linux does not too bad, though.<br><br>drbd 8 has much improvements in coping with hardware<br>(well, lower-layer) errors. but still,
<br>drbd cannot fix hardware.<br><br>you should have a raid1 (raid5, ...) below drbd.<br>you should have monitoring in place to alert you<br>when there are io errors, e.g. SMART monitor your disks,<br>monitor your hardware raid status. at minimum have a logcheck
<br>that scans for certain patterns in log files.<br><br>--<br>: Lars Ellenberg Tel +43-1-8178292-0 :<br>: LINBIT Information Technologies GmbH Fax +43-1-8178292-82 :<br>: Vivenotgasse 48, A-1120 Vienna/Europe
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