<table cellspacing='0' cellpadding='0' border='0' ><tr><td valign='top' style='font: inherit;'>Ed,<br><br> My two cents here.<br><br> I have some 3Gb datafiles here and restore to OCFS2 using rman with no problems. But I am using Linux 32bits and the backup is read from veritas netbackup so it is not exactly the same environment.<br><br> Also, <font><font size="2">1409*8192 gives about 11Mb, so you are well under 2Gb when the problem occurs. The fact that it is occuring on the larger files may be a coincidence. <br><br> You may be running into some operating system error or some other issue. Check /var/log/messages and dmesg to see if something is appearing. Are your ext3 filesystem also on the SAN?<br><br> Also, just a hunch, check if you are reaching the maximum AIO operations, the default on RedHat 4.0 is way low and this caused us some headaches when we implemented 10g, I never looked
how this is set on RH 5.0.<br><br> The current aio pending operations shows on /proc/sys/fs/aio-nr, the maximum is on /proc/sys/fs/aio-max-nr, if you are hitting the maximum AIO try to increase it, we set this to 1000000 here on /etc/sysctl.conf (fs.aio-max-nr = 1000000). <br><br>Regards,<br>Luis<br></font></font><br>--- On <b>Wed, 7/23/08, Ed Gulakowski <i><edgulak@gmail.com></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;">From: Ed Gulakowski <edgulak@gmail.com><br>Subject: [Ocfs2-users] ORA-19870 and ORA-19502 During RMAN restore to OCFS2 filesystem<br>To: ocfs2-users@oss.oracle.com<br>Date: Wednesday, July 23, 2008, 11:48 PM<br><br><div id="yiv1107269700"><font size="2">
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<div>Hi,</div>
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<div>When attempting to restore to LINUX RHEL5 - OCFS2 filesystem received the following error during RMAN restore for nearly all of the datafiles attempted to restore with exception of a couple of smaller datafiles which were smaller < 2GB.</div>
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<div>ORA-19870: error reading backup piece /db/dumps/TR1_1/rmanbackup/TR1_88_1</div>
<p>ORA-19502: write error on file "/db/devices/db1/PR2/pr2_1/pr2.data1", blockno 1409 (blocksize=8192)</p>
<p>ORA-27061: waiting for async I/Os failed</p>
<div>Linux-x86_64 Error: 5: Input/output error</div>
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<div>Tried various Oracle init parameters for filesystem i/o SETALL, ASYNCH, DIRECT and also disk_asynch_io settings.</div>
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<div>After this failure tried to used a non ocfs2 filesytem (ext3) for the source RMAN backup files, however the error still occurred. For testing purposes specified a non ocfs2 filesystem ( ext3 ) as restore target filesystem and the RMAN restore completed successfully without any errors.</div>
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<div>Let me know if you have any suggestions.</div>
<div>Thanks,<br>Ed</div>
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