OWC Accelsior S

[flyproductions]

If you run more than one OS natively from a single drive, partitioning is still a must.

Shure it is! ...and might primarily be a problem on Mobiles.

But on desktops/towers, when it came to more than one native OS, i always preferred multiple physical disks over partitions. Even in good old HDD-days.

 

[ToniCH]

If I understood it correctly this card needs Leopard to work in G5? So, I guess it will not work with the Shuriken as it seems to be built on 10.4.x?

 

[Amethyst1]

If I understood it correctly this card needs Leopard to work in G5?

Correct. Tiger on PPC doesn't have an AHCI driver. It does on Intel, but that one crashes at the sight of external AHCI controllers.

So, I guess it will not work with the Shuriken as it seems to be built on 10.4.x?

Correct.

 

[ToniCH]

Accelsior S in my G5 with an OWC 6G 1TB SATA3 SSD.

Ps. just out of interest I also tried the Accelsior 1M2 PCIe -card which takes a NVMe -drive but no, as expected its not recognized in the G5. Should work in Mac Pros though.

 

[Amethyst1]

Ps. just out of interest I also tried the Accelsior 1M2 PCIe -card which takes a NVMe -drive but no, as expected its not recognized in the G5.

You need to use an AHCI PCIe SSD in a G5. The Accelsior 1M2 is just a simple m.2-to-PCIe adapter.

Should work in Mac Pros though.

As long as you’re running at least High Sierra.

 

[ToniCH]

You need to use an AHCI PCIe SSD in a G5. The Accelsior 1M2 is just a simple m.2-to-PCIe adapter.

Are you saying that if I use the AHCI drive it will work in the G5?

Aren't AHCI and NVMe a different thing? The Accelsior 1M2 specs say supported drives are NVMe as says the box too. Is the card actually more versatile than advertised? Not that it matters much, the only drive I have that fits is a Samsung 980 NVMe.

 

[Amethyst1]

Aren't AHCI and NVMe a different thing?

They are different protocols/logical interfaces, but the physical interface is m.2 for both.

Are you saying that if I use the AHCI drive it will work in the G5?

Yes, as @flyproductions can confirm.

The specs say supported drives are NVMe as says the box too. Is the card actually more versatile than advertised?

AHCI SSDs were a short-lived interim solution on the way to NVMe so they didn’t bother mentioning them.

 

[joevt]

but the physical interface is m.2 for both.

M.2 socket 3 (key M) supports 4 lanes of PCIe. So most <socket 3> <key M> M.2 device should work since they all use 4 lanes of PCIe. AHCI and NVMe controllers on M.2 are PCIe devices.

Other M.2 devices (key B + M) (socket 2) may use SATA instead of PCIe. They could have PCIe x2.
http://www.hwtools.net/ExtenderBoard/P14S-P14F.html

https://www.atpinc.com/blog/what-is-m.2-M-B-BM-key-socket-3

key A+E (socket 1) are usually used for WiFi. The socket they connect to may have two separate PCIe x1 links.
http://www.hwtools.net/ExtenderBoard/P11S-P11F.html

There are adapters to connect different keys (for example, to connect a PCIe 4 lane M.2 device to a 1 lane socket 1 connector).
http://www.hwtools.net/M.2.html
http://www.hwtools.net/Extender_Board.html
http://www.hwtools.net/ExtenderBoard/R4 Series.html
http://www.hwtools.net/ExtenderBoard/R5 Series.html

 

[ToniCH]

BTW. when I said the card was not recognized in the G5 I mean absolutely nothing appeared in the PCI window in the system report. It remained blank and the "error reading PCI configuration" was displayed. So, I kind of think that was the Accelsior 1M2 incompatibility problem rather than the Samsung NVMe -problem.

Ps. the Accelsior 1M2 + Samsung 980 will find new life in my gaming PC...

 

[Amethyst1]

BTW. when I said the card was not recognized in the G5 I mean absolutely nothing appeared in the PCI window in the system report. It remained blank and the "error reading PCI configuration" was displayed. So, I kind of think that was the Accelsior 1M2 incompatibility problem rather than the Samsung NVMe -problem.

The Accelsior 1M2 has no electronics on it at all. Everything is on the NVMe which Leopard doesn't recognise. If you use an AHCI PCIe SSD, its controller will appear under "PCI Cards" (I'm using a Samsung SM951):