On 12/03/2018 Rick Stevens <ri...@alldigital.com> wrote:

> Yes, Doc, I get it. Having never done this myself, I can only suggest
> things. I believe you'll need to run "mdadm --auto-detect -v" to see
> if
> it can find the RST RAID metadata. If it finds the RST data, it
> should
> create a container device that represents the RST array. You should
> then
> be able to create a device from that container (and I'd suggest a
> read-
> only device) using "mdadm -A" would represent the RST array.
> 
> Again, I've never done this with an Intel RST array and I'm not sure
> any of my machines lying about have this "feature" enabled so I can't
> do any investigation myself. mdadm says it can deal with it and a
> google
> search reveals some results with Mint and Scientific Linux.
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> ---
> - Rick Stevens, Systems Engineer, AllDigital    ri...@alldigital.com
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Rick,

I'm still chipping away at this. I've had to solve a couple of blockers
using Live ISO images. For example, I had to change a BIOS display
setting from [Hybrid] to [Discrete] to get a proper X screen after the
GNOME display manager starts. There was also a bug in thinkpad-acpi
that I had to report to the developers.

I just booted the system using the Fedora-MATE_Compiz-Live-x86_64-
Rawhide-20190217.n.0.iso image on a thumb drive. I was hoping that the
latest 4.20 kernel might support the Intel RST. Running "mdadm --auto-
detect -v" seemed to create a /dev/md0 block device, but "mdadm --
details /dev/md0" says it has no members.

The problem still seems to be the Intel RST chip tightly bound to the
NVMe SSDs. I can break the factory RAID1 by changing the BIOS Storage
setting from [RST] to [AHCI], but I'm not ready to pull that grenade
pin just yet. There must be a non-destructive path to accessing the
native NVMe interfaces without having to resort to SATA emulation.

--Doc
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