[gpfsug-discuss] Disabling individual Storage Pools by themselves? How about GPFS Native Raid?

[Allen, Benjamin S.]

> One imagines that GNR uses the SCSI enclosure services to talk to the
> shelves.

It does. It just isn't aware of SAS topologies outside of the supported hardware configuration. As Sven mentioned the issue is mapping out which drive is which, which enclosure is which, etc. That's not exactly trivial todo in a completely dynamic way.

So while GNR can "talk" to the enclosures and disks, it just doesn't have any built-in logic today to be aware of every SAS enclosure and topology.

Ben

> On Jun 19, 2015, at 10:15 AM, Jonathan Buzzard <jonathan at buzzard.me.uk> wrote:
> 
> On Fri, 2015-06-19 at 10:56 -0400, Zachary Giles wrote:
>> I think it's technically possible to run GNR on unsupported trays. You
>> may have to do some fiddling with some of the scripts, and/or you wont
>> get proper reporting.
>> Of course it probably violates 100 licenses etc etc etc.
>> I don't know of anyone who's done it yet. I'd like to do it.. I think
>> it would be great to learn it deeper by doing this.
>> 
> 
> One imagines that GNR uses the SCSI enclosure services to talk to the
> shelves.
> 
> https://en.wikipedia.org/wiki/SCSI_Enclosure_Services
> https://en.wikipedia.org/wiki/SES-2_Enclosure_Management
> 
> Which would suggest that anything that supported these would work.
> 
> I did some experimentation with a spare EXP810 shelf a few years ago on
> a FC-AL on Linux. Kind all worked out the box. The other experiment with
> an EXP100 didn't work so well; with the EXP100 it would only work with
> the 250GB and 400GB drives that came with the dam thing. With the EXP810
> I could screw random SATA drives into it and it all worked. My
> investigations concluded that the firmware on the EXP100 shelf
> determined if the drive was supported, but I could not work out how to
> upload modified firmware to the shelf.
> 
> JAB.
> 
> -- 
> Jonathan A. Buzzard                 Email: jonathan (at) buzzard.me.uk
> Fife, United Kingdom.
> 
> 
> _______________________________________________
> gpfsug-discuss mailing list
> gpfsug-discuss at gpfsug.org
> http://gpfsug.org/mailman/listinfo/gpfsug-discuss