I had a simple issue a few years ago and it seem to resolve itself, but for the past few days I have been having issues with my Unraid VM,
my setup is as follows
B450 mother with 32Gib RAM
Proxmox is on a Enterprise 1TB SSD plug straight into a motherboard SATA
I then have a LSI SATA card with my Unraid Hard drivers plug into it
for my VM's I have
Unraid
RAM 8GB
BIOS SeaBios
Machine Q35 , with the Lastest Version and the VIOMMU set to Default (None)
Passthrough USB Pen Drive
the LSI SATA card passthrough

The issue is that after a few hours proxmox would halt with the follow issue and the only way to resolve this is to reboot the server, and then it would only last for about 4 hours and happen again.
it started off with this

then it become this

and now this

but if I remove the SAS Controller then my Unraid will load up with no issues.
I have ran the following command smartctl -a /dev/sda, and by the looks of it, it looks OK
smartctl 7.3 2022-02-28 r5338 [x86_64-linux-6.8.12-9-pve] (local build)
Copyright (C) 2002-22, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Western Digital Blue
Device Model: WDC WD10EZEX-08WN4A0
Serial Number: WD-WCC6Y6VFX4PN
LU WWN Device Id: 5 0014ee 2654b4edf
Firmware Version: 02.01A02
User Capacity: 1,000,204,886,016 bytes [1.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database 7.3/5319
ATA Version is: ACS-3 T13/2161-D revision 3b
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Fri May 30 21:09:28 2025 BST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x82) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Enabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: (11400) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 118) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x3035) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0
3 Spin_Up_Time 0x0027 179 172 021 Pre-fail Always - 2033
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 881
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0
9 Power_On_Hours 0x0032 052 052 000 Old_age Always - 35469
10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0
11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 251
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 158
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 1721
194 Temperature_Celsius 0x0022 113 103 000 Old_age Always - 30
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 200 200 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 200 200 000 Old_age Offline - 0
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Completed without error 00% 12381 -
# 2 Short offline Completed without error 00% 8758 -
# 3 Extended offline Completed without error 00% 5859 -
# 4 Extended offline Completed without error 00% 1618 -
# 5 Short offline Completed without error 00% 1321 -
SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.
also when I look within Proxmox I see all my Hard Drivers that are connection to the SAS Controllor,

as you can guest I am very confused. and any help will be very appreciated.
my setup is as follows
B450 mother with 32Gib RAM
Proxmox is on a Enterprise 1TB SSD plug straight into a motherboard SATA
I then have a LSI SATA card with my Unraid Hard drivers plug into it
for my VM's I have
Unraid
RAM 8GB
BIOS SeaBios
Machine Q35 , with the Lastest Version and the VIOMMU set to Default (None)
Passthrough USB Pen Drive
the LSI SATA card passthrough

The issue is that after a few hours proxmox would halt with the follow issue and the only way to resolve this is to reboot the server, and then it would only last for about 4 hours and happen again.
it started off with this

then it become this

and now this

but if I remove the SAS Controller then my Unraid will load up with no issues.
I have ran the following command smartctl -a /dev/sda, and by the looks of it, it looks OK
smartctl 7.3 2022-02-28 r5338 [x86_64-linux-6.8.12-9-pve] (local build)
Copyright (C) 2002-22, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Western Digital Blue
Device Model: WDC WD10EZEX-08WN4A0
Serial Number: WD-WCC6Y6VFX4PN
LU WWN Device Id: 5 0014ee 2654b4edf
Firmware Version: 02.01A02
User Capacity: 1,000,204,886,016 bytes [1.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database 7.3/5319
ATA Version is: ACS-3 T13/2161-D revision 3b
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Fri May 30 21:09:28 2025 BST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x82) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Enabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: (11400) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 118) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x3035) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0
3 Spin_Up_Time 0x0027 179 172 021 Pre-fail Always - 2033
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 881
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0
9 Power_On_Hours 0x0032 052 052 000 Old_age Always - 35469
10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0
11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 251
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 158
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 1721
194 Temperature_Celsius 0x0022 113 103 000 Old_age Always - 30
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 200 200 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 200 200 000 Old_age Offline - 0
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Completed without error 00% 12381 -
# 2 Short offline Completed without error 00% 8758 -
# 3 Extended offline Completed without error 00% 5859 -
# 4 Extended offline Completed without error 00% 1618 -
# 5 Short offline Completed without error 00% 1321 -
SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.
also when I look within Proxmox I see all my Hard Drivers that are connection to the SAS Controllor,

as you can guest I am very confused. and any help will be very appreciated.