On Monday 24 September 2007 19:33:32 Chandra Seetharaman wrote: > On Mon, 2007-09-24 at 17:06 +0100, Nuno Fernandes wrote: > > hello, > > > > Just a question: > > > > With recent support for rdac hardware handler in kernel 2.6.23-rc7, what > > configuration should be in storage DS4700? AVT (Automatic Volume > > transfer) turned on or off? > > Hardware handler is needed only for RDAC mode, AVT would work without > the hardware handler. > > The decision to use RDAC or AVT depends on your configuration. > > > When it's turned on, luns keep on jumping from controller to controller.. > > dm-multipath will use the other path (in AVT mode, IOW, jump) only if > I/O in the current path fails. Yes, but it keeps on jumping because of the multipathd monitoring of alive paths. I'm was already in the process of using linux-2.6-md-add-dm-rdac-hardware-handler.patch from kernel-2.6.18-36.el5.src.rpm (from RHEL5U1 Beta) to rebuild RHEL5.0 stable kernel.. Hope it works.. Best rgds Nuno Fernandes > > > Thanks > > Nuno Fernandes > > > > -- > > dm-devel mailing list > > dm-devel@xxxxxxxxxx > > https://www.redhat.com/mailman/listinfo/dm-devel -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
