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H2SO4

macrumors 603
Nov 4, 2008
5,683
6,958
I'm not making an assertion - just mentioning that I only seemed to notice problems with my 970 EVO Plus drives not my 970 PRO or 990 PRO drives. As I mentioned some drives and PCIe adapters did not play well with the cMP5,1.

Since I swapped out my 970 EVO Plus drives I can't test that theory. I too have had no problems with 14.5 but remain to be convinced it is fixed.
Assertion was probably too strong a word.
 

LukeMacPro

macrumors newbie
Original poster
Jun 4, 2022
8
2
Wow! It's been a while since I've checked in on this post that I originaly made back in Oct '22 and seems like quite a lot of peeps are getting similar issues.

It's worth re-mentioning a couple of points.

These mounting issues are nothing new with Sonoma as I experienced this back when using Monterey.

I seemed to resolve most of the mounting issues at the time by formatting the drives as Raid0 with Softraid rather than Apple disk utility.

I still to this day have mounting issues with my Sonnet’s M.2 4x4 PCIe card. No difference if formatted APFS or OSX Journaled. These are 4x Samsung SSD 980 Pro 2TB. I need to do further testing on each stick to check if one is failing. Nothing to do with the heat as it can fail to mount after the computer has been powered off for some time.

I am on the latest version of Sonoma.

I've just bought the Sonnet M.2 8x4 Silent PCIe to replace the 4x4 card. I'll update with how this goes.
 
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CanPhantom

macrumors member
Oct 21, 2014
42
21
I'm not making an assertion - just mentioning that I only seemed to notice problems with my 970 EVO Plus drives not my 970 PRO or 990 PRO drives. As I mentioned some drives and PCIe adapters did not play well with the cMP5,1.

990 pro here. Problem persists. I've tried different brands, different models. Problem always persists. Since as far back as Big Sur or Monterey - this bug has been around so long I can't remember when it started any more - and it continues through 14.5. Just had one of these incidents this morning on a freshly-upgraded machine.
 

sfalatko

macrumors 6502a
Sep 24, 2016
595
331
Problem persists for me - I booted in to Windows to verify through the Samsung Magician software that I had the latest firmware for my drives (I did). When I booted back in to Sonoma (warm boot) the blades had disappeared. Shut down and then restart and they reappeared.

Oh well....
 

H2SO4

macrumors 603
Nov 4, 2008
5,683
6,958
Wow! It's been a while since I've checked in on this post that I originaly made back in Oct '22 and seems like quite a lot of peeps are getting similar issues.

It's worth re-mentioning a couple of points.

These mounting issues are nothing new with Sonoma as I experienced this back when using Monterey.

I seemed to resolve most of the mounting issues at the time by formatting the drives as Raid0 with Softraid rather than Apple disk utility.

I still to this day have mounting issues with my Sonnet’s M.2 4x4 PCIe card. No difference if formatted APFS or OSX Journaled. These are 4x Samsung SSD 980 Pro 2TB. I need to do further testing on each stick to check if one is failing. Nothing to do with the heat as it can fail to mount after the computer has been powered off for some time.

I am on the latest version of Sonoma.

I've just bought the Sonnet M.2 8x4 Silent PCIe to replace the 4x4 card. I'll update with how this goes.
Was news to me that the bug is so old.
 

mattspace

macrumors 68040
Jun 5, 2013
3,202
2,883
Australia
Two 990 Pro's in Highpoint 1104f under the latest Ventura release, now booting off one of them. No problems here.

Things about my system folks might like to test:
  • The highpoint has a fan, which it spins up instantly on boot or wake. Do passive Vs active coolers make a difference as a result of early power draw?
  • My system permanently boots in verbose mode.
  • I only boot to the one macOS install, no Windows / Linux.
  • I have system access to the power schedule disabled.
 

Norbert Mikołajczyk

macrumors 6502
May 26, 2016
326
144
I have an update, after a month or so of happy mounting this was the day when my drives haven't mounted :D
Restart didn't help, the shutdown and cold start worked...
Apple is sh**
 

rhoulian

macrumors newbie
Mar 5, 2024
20
16
Hi guys, here is my update : I am still on MP2019 / OWC Excelsior + Samsung EVO / Raid 0 (softraid) / Sonoma 14.4.

I sometimes have those mounting failure, but every time a PRAM reset on reboot is successful (note that I don't reboot the MP, I shut it down totally, and press cmd+alt+P+R on startup).

I am used to power off the MP daily, after work.

I have seen that both softraid and apple have updated their versions, but I prefer to keep things as they are, as it's not so terrible... I prefer to wait for an annoucement of the official fix
 

mattspace

macrumors 68040
Jun 5, 2013
3,202
2,883
Australia
As a datapoint if it hasn't been asked before - how many folks having trouble are over their PCI pool allocation total, and how many have more lanes worth of SSD installed on the card, than they have lanes worth of slot?
 

H2SO4

macrumors 603
Nov 4, 2008
5,683
6,958
As a datapoint if it hasn't been asked before - how many folks having trouble are over their PCI pool allocation total, and how many have more lanes worth of SSD installed on the card, than they have lanes worth of slot?
This is mine;

Screenshot 2024-05-24 at 04.46.39.jpg
 

sfalatko

macrumors 6502a
Sep 24, 2016
595
331
This is mine - Apple IO Card in Slot 8, OWC Accelsior S with a Samsung 860 EVO 1TB in Slot 7, and a Sonnet M.2 4x4 PCIe Card with two Samsung 990 PRO 4 TB and one Samsung 970 PRO 1 TB in Slot 5 -
 

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avro707

macrumors 68000
Dec 13, 2010
1,877
1,225
Boom, I spoke too soon - it just happened for me again. Doing nothing more than just trying to copy some files across from the Windows 11 drive.

Only four images, nothing else.

1716549521467.png


This time it didn't take all the drives out, only the storage one. The Bootcamp drive remains available, although anything I try and copy from it doesn't work.

My Sonnet card is in slot 5, Afterburner card in Slot 3

1716549895278.png


I'm still with the single W6800X GPU in slot 1, the dual W6800X Duos haven't arrived yet.
 
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sfalatko

macrumors 6502a
Sep 24, 2016
595
331
Boom, I spoke too soon - it just happened for me again. Doing nothing more than just trying to copy some files across from the Windows 11 drive.

Only four images, nothing else.

View attachment 2381867

This time it didn't take all the drives out, only the storage one. The Bootcamp drive remains available, although anything I try and copy from it doesn't work.

My Sonnet card is in slot 5, Afterburner card in Slot 3

View attachment 2381870

I'm still with the single W6800X GPU in slot 1, the dual W6800X Duos haven't arrived yet.
I have a W6800X in Slot 1 ....and no dual W6800X on order ...
 

cobra521

macrumors 6502
Dec 14, 2016
389
134
FL
Here's mine:
Screenshot 2024-05-24 at 9.05.45 AM.png

Using Sonoma 14.5. One of the cards with 4 2TB SSDs disappeared on boot this AM. Probably the one in the x8 slot -slot 7?

Next PC probably gonna be Windows....

Tom
 

mattspace

macrumors 68040
Jun 5, 2013
3,202
2,883
Australia
So looking at some of these Expansion Slot Utility screencaps, I decided to re-check mine, and was shocked to see the previously 100% on A & B was now showing 125% on B... then I realised something for which I hadn't quite comprehended the full consequences - plugging in cables which change the port format (eg USB Type-C to Type-A, B, Lightning etc.) eats lane allocation (according to the utility).

It even eats 4 extra lanes when you plug in a cable that isn't connected to anything, or when you plug it into the TB ports on an MPX GPU.

Plugging in a Type-C to Type-C cable has no such effect.

I would guess @cobra521 has a Type-C to (something else) peripheral plugged into one of their ports.

Weirdness.
 
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H2SO4

macrumors 603
Nov 4, 2008
5,683
6,958
So looking at some of these Expansion Slot Utility screencaps, I decided to re-check mine, and was shocked to see the previously 100% on A & B was now showing 125% on B... then I realised something for which I hadn't quite comprehended the full consequences - plugging in cables which change the port format (eg USB Type-C to Type-A, B, Lightning etc.) eats lane allocation (according to the utility).

It even eats 4 extra lanes when you plug in a cable that isn't connected to anything, or when you plug it into the TB ports on an MPX GPU.

Plugging in a Type-C to Type-C cable has no such effect.

I would guess @cobra521 has a Type-C to (something else) peripheral plugged into one of their ports.

Weirdness.
Ok now this is VERY interesting.
 

smckenzie

macrumors member
May 7, 2022
87
102
So today I had 3 WinServer errors which hard reset my 7,1 and resulted in my project file being corrupted. After the 3rd reset my main OWC Accelsior 1M2 drive won't mount. I've tried NVRAM reset, it did chime twice, but still nothing. Re-seated the card which is Slot 5. Nothing. Tried First Aid in Recovery Mode which failed on the drive.

Any other suggestions? This is so frustrating as I've lost work and now a drive won't mount. Thanks Apple.

Sonoma 14.5
 

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avro707

macrumors 68000
Dec 13, 2010
1,877
1,225
It even eats 4 extra lanes when you plug in a cable that isn't connected to anything, or when you plug it into the TB ports on an MPX GPU.

Plugging in a Type-C to Type-C cable has no such effect.


I do have some USB-C to type A cables connected. I had never put much thought into those.

What about connecting them elsewhere?

However this didn’t exist before in our old OS, so while it’s interesting to check, it’s still something Apple needs to sort out.
 

ChrisMakesNMods

macrumors newbie
Apr 22, 2024
10
4
So today I had 3 WinServer errors which hard reset my 7,1 and resulted in my project file being corrupted. After the 3rd reset my main OWC Accelsior 1M2 drive won't mount. I've tried NVRAM reset, it did chime twice, but still nothing. Re-seated the card which is Slot 5. Nothing. Tried First Aid in Recovery Mode which failed on the drive.

Any other suggestions?
80% you have already tried this...

When I can't get macOS to recognize my OWC 4m2 I sometimes have to remove it, boot, shutdown, replace it, and then boot to get it to be recognized. Major pain, but works as a method of last resort for me.
 
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