Sorry Hannes; My apologies. I am guilty of hijacking the thread, tho i plead that it was inadvertent. :-P indeed, ZAC/ZBC is orthagonal to multipath, no arguments there. My response was directed to Mike's discourse on the available testing tools for device mapper and contained my ruminations about how to leverage those tools for the project that I am lucky enuf to be working on. ________________________________________ From: Hannes Reinecke [hare@xxxxxxx] Sent: Thursday, July 17, 2014 10:57 PM To: John Utz Cc: dm-devel@xxxxxxxxxx Subject: Re: dm-multipath: Accept failed paths for multipath maps On 07/18/2014 05:31 AM, John Utz wrote: > Thankyou very much for the exhaustive answer! I forwarded on to my > project peers because i don't think any of us where aware of the > existing infrastructure. > > Of course, said infrastructure would have to be taught about ZAC, > but it seems like it would be a nice place to start testing from.... > ZAC is a different beast altogether; I've posted an initial set of patches a while back on linux-scsi. But I don't think multipath needs to be changed for that. Other areas of device-mapper most certainly do. Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@xxxxxxx +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg) -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel