Ed, My two cents here.
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. Also, 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. 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? 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. 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). Regards, Luis --- On Wed, 7/23/08, Ed Gulakowski <[EMAIL PROTECTED]> wrote: From: Ed Gulakowski <[EMAIL PROTECTED]> Subject: [Ocfs2-users] ORA-19870 and ORA-19502 During RMAN restore to OCFS2 filesystem To: [email protected] Date: Wednesday, July 23, 2008, 11:48 PM Hi, 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. ORA-19870: error reading backup piece /db/dumps/TR1_1/rmanbackup/TR1_88_1 ORA-19502: write error on file "/db/devices/db1/PR2/pr2_1/pr2.data1", blockno 1409 (blocksize=8192) ORA-27061: waiting for async I/Os failed Linux-x86_64 Error: 5: Input/output error Tried various Oracle init parameters for filesystem i/o SETALL, ASYNCH, DIRECT and also disk_asynch_io settings. 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. Let me know if you have any suggestions. Thanks, Ed _______________________________________________ Ocfs2-users mailing list [email protected] http://oss.oracle.com/mailman/listinfo/ocfs2-users
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