Hufh, Unfortunately I don't have the patch anymore, but it should be in the archives (search for multihost RAID). Basically it locks a RAID volume on shared storage to a specific node in the cluster. This allows you to use RAID autostart on each node and during startup, the superblock will be checked to determine if the RAID volume specified in the superblock has the same SCSI host ID as the current host. Then you can specify different host adaptors for each host, which locks the RAID superblock to a specific host. This does not allow using multiple hosts to the SAME RAID volume, and only provides exclusive access. Note that the same thing can be done using a configuration file per node and using mdadm to only start the RAID volumes needed. This is the methodology recommended by RAID maintainer, Neil Brown, however, I find it difficult to setup which is why I proposed the patch. He could probably provide more info on that methodology or there is a discussion in the archives. If I ever get some time, I plan to implement shared access to the same RAID volume for usage in a clustered filesystem application such as GFS. On Tue, 2004-08-03 at 22:48, hufh@Lenovo.com wrote: > Mr Dake: > I am very sorry to bother you. I encountered some troubles. > MD device is used in my 3 node cluster, and each node need > access. I know you contribute a patch, but i cannot find it > in LKML, could you mail me and tell me it's main idea? > Thank you very much. > Best Regards! > > Yours Sincerely > Hu Fenghua > > - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
