Hi, I recently did a 'cp -r dir1 dir2' and noticed that it hanged -- no more I/O occurred after it hanged, and a reboot was necessary. I did this all within a ZFS pool, although it appears that this is not a ZFS issue, but probably deep down in some driver somewhere. I am using an MCP55 controller, which is built in to the Asus M2N-SLI Deluxe motherboard I am using for this ZFS fileserver.
To get all the details of the tests I performed, according to other forum members here, take a look at the following two threads, which was one thread that mysteriously split into two threads :) http://www.opensolaris.org/jive/thread.jspa?threadID=58652&tstart=0 http://www.opensolaris.org/jive/thread.jspa?threadID=59041&tstart=0 To save yourself a lot of time, I recommend reading the last part of page 2 of the second thread link. In a nutshell, it seems that the 'cp' command stresses the nv_sata driver, so to avoid lockup, my workaround is to avoid 'cp' and use 'rsync' for intra-pool copies as it stresses the system less. Of course, I would like to verify if this problem is indeed already known about, and to have an idea of when a fix will be available. My initial discovery of the problem was in snv_87, so it appears the problem has not been fixed in that release. If anyone knows any more about this, then I would like to hear about it. This was moved here from zfs-discuss, as it appears that the root cause lies outside ZFS. BTW, I'm using snv_85 currently. I first saw the problem on snv_87, but then went back and installed snv_85, hoping to get rid of the problem (but it didn't). Here is the list of bugs that appear to be more or less related to this: http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6658565 (Accepted) http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6642154 (dup of 6662881) http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6662881 (fixed in snv_87) http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6669134 (fixed in snv_90) http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6662400 (dup of 6669134) http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6671523 (Accepted) http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6672202 (Need more info) And here's a post with a similar complaint: http://de.opensolaris.org/jive/thread.jspa?threadID=51297&start=0&tstart=0 Thanks, Simon ============================================================== Blog: http://breden.org.uk ZFS articles: http://breden.org.uk/2008/03/02/a-home-fileserver-using-zfs/ ============================================================== This message posted from opensolaris.org _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
