I think he is referring only to the CLVM Mirroring feature. AFAIK, you can put drbd on top of a raid device with no problem. -----Original Message----- From: linux-cluster-bounces@xxxxxxxxxx [mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of Gordan Bobic Sent: Tuesday, January 22, 2008 3:35 PM To: linux clustering Subject: Re: any timeline for supporting software RAID? Actually, can somebody elaborate what this means? Does it mean that it isn't possible to put a DRBD on top of a /dev/mdX device? Gordan Jeff Wasilko wrote: > Could someone comment on the potential timeline for supporting > software raid in CLVM? Any hopes of it soon? > > Thanks! > > (from http://www.redhat.com/magazine/009jul05/departments/tips_tricks/ > ) > > > Does Red Hat Cluster Suite support software RAID (like Veritas and HP)? > by John Berninger > > At the present time, software RAID drivers are not supported in the > Red Hat Cluster Suite (RHCS) due to state maintenance issues between nodes. > > The present versions of mdadm and RHCS are unable to transfer state > information from one node to another in a cluster, so the node not > actively using the file system is unable to determine the status of > the RAID in case of a fence or STONITH operation. This inability could > lead to file system corruption if a state is calculated incorrectly, > which would likely be worse than not having the RAID in place in the beginning. > > Red Hat engineers are working on a new volume manager, the Cluster > Logical Volume Manager (CLVM), which will enable the use of LVM on > shared storage. Once this work is complete, finalized testing and > quality assurance will begin on making multi-pathed CLVM available for > production use, which will act in place of software RAID in a cluster > environment, providing similar functionality through different means. > > > ---------------------------------------------------------------------- > -- > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
