Here is some more info. In initrd are modules for multipathing and rdac failover, but mkinitrd does not add multipath.conf to the initrd file. Don't know why.
2 servers are connected to to disk array (IBM DS4700) via 2 FC switches and 2 FC cards (in eatch server). There are 2 paths seen - active and passive. The paths connections are separated. Regards, Krzysztof [email protected] — zapisano w dniu 2010-07-28 11:26:07: > > [rhelv5-list] RHEL5 multipathing rdac - error messages during startup. > > Hi everone, > > I managed to configure the multipathing devices with device-mapper- > multipathing rdac (active-passive), however while system is booting > I can see a lot of messages like: > > Buffer I/O error on device sdaa, logical block 0 > end_request: I/O error, dev sdab, sector 0 > end_request: I/O error, dev sdac, sector 0 > end_request: I/O error, dev sdad, sector 0 > end_request: I/O error, dev sdaf, sector 0 > end_request: I/O error, dev sdae, sector 524287992 > end_request: I/O error, dev sdz, sector 524287936 > end_request: I/O error, dev sdab, sector 0 > printk: 6 messages suppressed. > Buffer I/O error on device sdab, logical block 0 > end_request: I/O error, dev sdac, sector 0 > end_request: I/O error, dev sdad, sector 0 > end_request: I/O error, dev sdaf, sector 0 > end_request: I/O error, dev sdae, sector 524287992 > end_request: I/O error, dev sdz, sector 524287984 > end_request: I/O error, dev sdab, sector 0 > […] > > Probably nash or something else during startup is checking all the > devices (including the passive ones) that cause the very long system > startup (we have like 26 FC devices). > After startup device multipathig works fine, /dev/mapper is full of > aliased devices, but still, from time to time, there are some error > messages appering on the console. Like system was checking the passive nodes. > > Is there any way to prevent such behavior ? > > Restards, > Krzysztof _______________________________________________ > rhelv5-list mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/rhelv5-list
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