Kernel Panic Imac 27 "Command Timeout"

[ryman145]

Looking for some assistance here with my 27" iMac 2017 (intel) that is having kernel panics on startup.

Anytime the Mac is off and is turned on from boot the "command timeout" kernel panic occurs. Once booted the Mac is super slow and lags until I restart it and boot resetting the NVRAM (Option + Command + P + R)

I reinstalled Ventura OS and this is still occurring. Booted into safe mode, performed disk utility, used CleanMyMac (no errors) and performed the apple diagnostics (no issues found).

Anyone have any idea what could be causing this?

See Kernel panic below
panic(cpu 0 caller 0xffffff800778d676): nvme: ". Command timeout. Write. fBuiltIn=1 MODEL=APPLE SSD SM0032L FW=DXZ77A0Q CSTS=0x1 US[1]=0x0 US[0]=0x940 VID=0x144d DID=0xa806 CRITICAL_WARNING=0x0.\n" @IONVMeController.cpp:6151
Panicked task 0xffffff8bf3030208: 183 threads: pid 0: kernel_task
Backtrace (CPU 0), panicked thread: 0xffffff8728a5db30, Frame : Return Address

 

[bogdanw]

MODEL=APPLE SSD SM0032L FW=DXZ77A0Q CSTS=0x1 US[1]=0x0 US[0]=0x940 VID=0x144d DID=0xa806 CRITICAL_WARNING=0x0.\n" @IONVMeController.cpp:6151

Looks like a problem with the SSD.

 

[ryman145]

Looks like a problem with the SSD.

Do you know of any fixes for this without taking the screen apart? any type of reset?

 

[bogdanw]

You can try First Aid from Recovery - “Repair volumes, then containers, then disks”
https://support.apple.com/en-us/HT210898
Did you replace the drive or made any physical intervention on it? In that case, maybe it was not properly connected and sometimes it disconnects.

 

[ryman145]

You can try First Aid from Recovery - “Repair volumes, then containers, then disks”
https://support.apple.com/en-us/HT210898
Did you replace the drive or made any physical intervention on it? In that case, maybe it was not properly connected and sometimes it disconnects.

Ok I will try to boot into recovery and first aid.

Nope, I did not change anything. It happened as I upgraded to Ventura.

 

[stradify]

Go to System Information>Hardware and check the SSD status.
If it's ok it will show: S.M.A.R.T. Status: Verified
If you see Failing or Failed then that would confirm your SSD is shot.

To get a more granular look at your SSD's S.M.A.R.T. statistics you can run Drive DX.

 

[ryman145]

Go to System Information>Hardware and check the SSD status.
If it's ok it will show: S.M.A.R.T. Status: Verified
If you see Failing or Failed then that would confirm your SSD is shot.

To get a more granular look at your SSD's S.M.A.R.T. statistics you can run Drive DX.

All systems appear to be nominal with the drive. Is there a specific check for SSD? I'm only seeing my 1TB HDD

 

[bogdanw]

The SSD should be in the NVMExpress section of System Information - Hardware
Your HDD has a problem too. The “Partition Map Type” appears as “Unknown”, it should be GPT.
Don’t attempt to repair it without backing up the HDD.

 

[ryman145]

The SSD should be in the NVMExpress section of System Information - Hardware
Your HDD has a problem too. The “Partition Map Type” appears as “Unknown”, it should be GPT.
Don’t attempt to repair it without backing up the HDD.

It literally says the computer doesn't have any NVME devices

 

[bogdanw]

To exclude a software problem, you can try to make a clean Monterey install.

How to download macOS https://support.apple.com/en-us/HT211683
Create a bootable installer for macOS https://support.apple.com/en-us/HT201372

If the problem persists, you should probably consider taking your iMac to an Apple service.

 

[ryman145]

To exclude a software problem, you can try to make a clean Monterey install.

How to download macOS https://support.apple.com/en-us/HT211683
Create a bootable installer for macOS https://support.apple.com/en-us/HT201372

If the problem persists, you should probably consider taking your iMac to an Apple service.

Does this look strange to you that disk0 or my internal ssd is a partition?

 

[bogdanw]

Are you sure you had one SSD and one HDD? Maybe you have a Fusion Drive.
Similar problem here https://forums.macrumors.com/threads/apple-hdd-not-there.2377999/

 

[ryman145]

Are you sure you had one SSD and one HDD? Maybe you have a Fusion Drive.
Similar problem here https://forums.macrumors.com/threads/apple-hdd-not-there.2377999/

Yes I have the Fusion Drive. Is the above screenshot correct in showing the drives?

 

[bogdanw]

Yes I have the Fusion Drive. Is the above screenshot correct in showing the drives?

I have no experience with Fusion Drives. @Fishrrman might be able to help.
Apple’s instructions “How to fix a split Fusion Drive” https://support.apple.com/en-us/HT207584