@comdirect Use this command: (replace sda in the command below with the relevant device) cat /sys/block/sda/queue/scheduler The active scheduler will be enclosed in brackets. e.g. noop deadline [cfq] For multiple drives use: grep "" /sys/block/*/queue/scheduler

@stormi Thank you so much. Only now getting around to setting up another set of R660s, will let you know how this works. Edit: worked beautifully on a new set of R660s. Using the old 20250606 ISO, the BCM57414 were not detected. The new ISO works as expected (BIOS install, did not attempt UEFI) and the NICs are all enumerated properly.

@AtaxyaNetwork Hi yes, Sorry I'm not super experienced in this area at all. I'm SSHd into the host and just ran dmesg -T in the root. [image: 1771509732474-0583e493-4d70-40b7-afc0-a88b0d9fd1a4-image.png]

@acebmxer There are older versions of the guest tools still available on Github.

We do upgrade drivers, especially via alt, it's pretty safe (LTS doesn't mean frozen drivers). @stormi could confirm.

@magicker Thanks, I was also thinking it would be a good idea to monitor CPU temps just to make sure its nothing related to that. As I have a consumer motherboard I don't have IPMI to monitor. I believe I could install some linux temperature monitoring packages in the xcp-ng host, but I didn't dare to do that yet not wanting to risk breaking anything on the host. Or would you guys say it's in principle fine to install such temp monitoring tool on the host?

@yannsionneau Hi, Sorry for the delay... menuentry 'XCP-ng' { search --label --set root root-zrxcsq multiboot2 /boot/xen.gz dom0_mem=8192M,max:8192M watchdog ucode=scan dom0_max_vcpus=1-16 crashkernel=256M,below=4G console=vga vga=mode-0x0311 module2 /boot/vmlinuz-4.19-xen root=LABEL=root-zrxcsq ro nolvm hpet=disable console=hvc0 console=tty0 quiet vga=785 splash plymouth.ignore-serial-consoles xen-pciback.hide=(0000:03:00.0) module2 /boot/initrd-4.19-xen.img } 03:00.0 VGA compatible controller: NVIDIA Corporation GB202GL [RTX PRO 6000 Blackwell Max-Q Workstation Edition] (rev a1) (prog-if 00 [VGA controller]) Subsystem: NVIDIA Corporation Device 204c Physical Slot: 10 Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Interrupt: pin A routed to IRQ 89 Region 0: Memory at f4000000 (32-bit, non-prefetchable) [disabled] [size=64M] Region 1: Memory at 70060000000 (64-bit, prefetchable) [disabled] [size=256M] Region 3: Memory at 70070000000 (64-bit, prefetchable) [disabled] [size=32M] Region 5: I/O ports at 1000 [disabled] [size=128] Expansion ROM at f8000000 [disabled] [size=512K] Capabilities: [40] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold-) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities: [48] MSI: Enable- Count=1/16 Maskable+ 64bit+ Address: 0000000000000000 Data: 0000 Masking: 00000000 Pending: 00000000 Capabilities: [60] Express (v2) Legacy Endpoint, MSI 00 DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <64ns, L1 unlimited ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+ Unsupported- RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ FLReset- MaxPayload 256 bytes, MaxReadReq 512 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend- LnkCap: Port #0, Speed unknown, Width x16, ASPM L1, Exit Latency L0s unlimited, L1 unlimited ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+ LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed unknown, Width x4, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- DevCap2: Completion Timeout: Range AB, TimeoutDis+, LTR+, OBFF Via message DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR+, OBFF Via WAKE# LnkCtl2: Target Link Speed: Unknown, EnterCompliance- SpeedDis- Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS- Compliance De-emphasis: -6dB LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+, EqualizationPhase1+ EqualizationPhase2+, EqualizationPhase3+, LinkEqualizationRequest- Capabilities: [9c] Vendor Specific Information: Len=14 <?> Capabilities: [100 v1] #19 Capabilities: [12c v1] Latency Tolerance Reporting Max snoop latency: 1048576ns Max no snoop latency: 1048576ns Capabilities: [134 v1] #15 Capabilities: [14c v1] #25 Capabilities: [158 v1] #26 Capabilities: [188 v1] #2a Capabilities: [1b8 v2] Advanced Error Reporting UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq+ ACSViol- UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO+ CmpltAbrt- UnxCmplt+ RxOF+ MalfTLP+ ECRC+ UnsupReq- ACSViol- CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr- CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr- AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn- Capabilities: [200 v1] #27 Capabilities: [248 v1] Alternative Routing-ID Interpretation (ARI) ARICap: MFVC- ACS-, Next Function: 1 ARICtl: MFVC- ACS-, Function Group: 0 Capabilities: [2a4 v1] Vendor Specific Information: ID=0001 Rev=1 Len=014 <?> Capabilities: [2bc v1] Power Budgeting <?> Capabilities: [2f4 v1] Device Serial Number 18-a6-fe-7f-8f-2d-b0-48 Kernel driver in use: pciback 03:00.1 Audio device: NVIDIA Corporation Device 22e8 (rev a1) Subsystem: NVIDIA Corporation Device 0000 Physical Slot: 10 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin B routed to IRQ 10 Region 0: Memory at f8080000 (32-bit, non-prefetchable) [size=16K] Capabilities: [40] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities: [48] MSI: Enable- Count=1/1 Maskable+ 64bit+ Address: 0000000000000000 Data: 0000 Masking: 00000000 Pending: 00000000 Capabilities: [60] Express (v2) Endpoint, MSI 00 DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <64ns, L1 unlimited ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 75.000W DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+ Unsupported- RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ MaxPayload 256 bytes, MaxReadReq 512 bytes DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr- TransPend- LnkCap: Port #0, Speed unknown, Width x16, ASPM L1, Exit Latency L0s unlimited, L1 unlimited ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+ LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed unknown, Width x4, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- DevCap2: Completion Timeout: Range AB, TimeoutDis+, LTR+, OBFF Via message DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1- EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest- Capabilities: [9c] Vendor Specific Information: Len=14 <?> Capabilities: [100 v1] #25 Capabilities: [10c v2] Advanced Error Reporting UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq+ ACSViol- UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq+ ACSViol- UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO+ CmpltAbrt- UnxCmplt+ RxOF+ MalfTLP+ ECRC+ UnsupReq- ACSViol- CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr- AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn- Capabilities: [154 v1] Alternative Routing-ID Interpretation (ARI) ARICap: MFVC- ACS-, Next Function: 0 ARICtl: MFVC- ACS-, Function Group: 0 09:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Genoa/Bergamo Dummy Function (rev 01) Subsystem: Advanced Micro Devices, Inc. [AMD] Genoa/Bergamo Dummy Function Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Capabilities: [48] Vendor Specific Information: Len=08 <?> Capabilities: [50] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities: [64] Express (v2) Endpoint, MSI 00 DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <4us, L1 unlimited ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ SlotPowerLimit 0.000W DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+ Unsupported- RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ FLReset- MaxPayload 128 bytes, MaxReadReq 512 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend- LnkCap: Port #0, Speed unknown, Width x16, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+ LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed unknown, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR-, OBFF Not Supported DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled LnkCtl2: Target Link Speed: Unknown, EnterCompliance- SpeedDis- Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS- Compliance De-emphasis: -6dB LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1- EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest- Capabilities: [100 v1] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?> Capabilities: [270 v1] #19 Capabilities: [328 v1] Alternative Routing-ID Interpretation (ARI) ARICap: MFVC- ACS-, Next Function: 1 ARICtl: MFVC- ACS-, Function Group: 0 Capabilities: [410 v1] #26 Capabilities: [450 v1] #27 Capabilities: [500 v1] #2a xe pci-list uuid ( RO) : 73708288-55ec-b17f-ba73-6d2c116b3bbc vendor-name ( RO): NVIDIA Corporation device-name ( RO): GB202GL [RTX PRO 6000 Blackwell Max-Q Workstation Edition] pci-id ( RO): 0000:03:00.0 uuid ( RO) : c94f0327-8c86-3aa8-dd7c-9389ae1123f5 vendor-name ( RO): Intel Corporation device-name ( RO): Ethernet Controller X550 pci-id ( RO): 0000:81:00.1 uuid ( RO) : 09e0f3b1-18bb-8a6e-97d8-0209a8e4a97c vendor-name ( RO): Advanced Micro Devices, Inc. [AMD] device-name ( RO): FCH SATA Controller [AHCI mode] pci-id ( RO): 0000:0a:00.1 uuid ( RO) : cc5feb5c-b8aa-a975-de76-513d309f8e73 vendor-name ( RO): Intel Corporation device-name ( RO): Ethernet Controller X550 pci-id ( RO): 0000:41:00.0 uuid ( RO) : 72baa4c2-13b3-22fb-cc87-b10033ccb025 vendor-name ( RO): Broadcom / LSI device-name ( RO): MegaRAID 12GSAS/PCIe Secure SAS39xx pci-id ( RO): 0000:c1:00.0 uuid ( RO) : d2d40d25-4b69-7f6a-a8e2-3101ad80fcb6 vendor-name ( RO): Intel Corporation device-name ( RO): Ethernet Controller X550 pci-id ( RO): 0000:41:00.1 uuid ( RO) : 630bdaee-0e03-b8a1-c726-4f34230e89f7 vendor-name ( RO): Intel Corporation device-name ( RO): Ethernet Controller X550 pci-id ( RO): 0000:81:00.0 uuid ( RO) : d4023077-83fe-a0b7-5f3f-516204c2c1d1 vendor-name ( RO): Advanced Micro Devices, Inc. [AMD] device-name ( RO): FCH SATA Controller [AHCI mode] pci-id ( RO): 0000:ce:00.1 uuid ( RO) : c67855cd-4908-0711-7424-a6db2eb011f0 vendor-name ( RO): Advanced Micro Devices, Inc. [AMD] device-name ( RO): FCH SATA Controller [AHCI mode] pci-id ( RO): 0000:0a:00.0 uuid ( RO) : ef1d93e4-e82b-c33c-a488-8f7a9129eb8a vendor-name ( RO): NVIDIA Corporation device-name ( RO): Device 22e8 pci-id ( RO): 0000:03:00.1 uuid ( RO) : b6235c56-4070-dc4d-9db2-5e361f38d2b2 vendor-name ( RO): Advanced Micro Devices, Inc. [AMD] device-name ( RO): FCH SATA Controller [AHCI mode] pci-id ( RO): 0000:ce:00.0 uuid ( RO) : 5c7258ae-504b-9ac4-8b16-7129b8d8455d vendor-name ( RO): ASPEED Technology, Inc. device-name ( RO): ASPEED Graphics Family pci-id ( RO): 0000:cc:00.0 xl pci-assignable-list 0000:03:00.0 Model: Supermicro AS-2015CS-TNR

Good afternoon, I have resolved the problem. Domo was trying to use the network Controller. Fixed it by using, /opt/xensource/libexec/xen-cmdline --set-dom0 "xen-pciback.hide=(0000:44:00.0)(0000:44:00.1)(0000:45:00.0)(0000:45:00.1)" reboot xl pci-assignable-list Xen Orchestra now allows PCI Networking Card to Pass-Through the VM. Regards

@DustinB said in Recommended DELL Hardware ?: Doesn't using non-shared storage ultimately cause the VM to be started on the other host? No. Live migration can occur between hosts even if: the VDI are located on non-shared storage the hosts are in completely different pools For the cross pool migration to succeed, both pools need to support a common instruction set. Otherwise, use the Warm Migration feature that does reboot the VM so that it is running the correct instruction set on the destination host.

@whyberg Nope... that feature is part of the CPU. But is that the actual problem? Maybe... As that machine is too old to do any real work, it's a fine toy. There are better faster cheap test machines available.

@wlp94114 for example, did you get any warnings in the kernel logs about the firmware version mismatch?

Ahh excellent news. So indeed the new kernel sees the device USB policy will be improved in the future so it's kept after updates, so doing it once will be enough. Thanks for testing!

Hi! See https://docs.xcp-ng.org/releases/release-8-3/#4k-native-disks and https://docs.xcp-ng.org/storage/#largeblock-sr Note that qcow2 format is supporting 4k natively, and it's in release candidate stage, maybe the right approach in a near future

Mentioning also @Team-Hypervisor-Kernel who now manages the drivers. Maybe it's related to https://github.com/xcp-ng-rpms/microsemi-aacraid/issues/2#issuecomment-3837183087 It looks like the switch to the vendor driver instead of the kernel built-in for 8.3 (initiated by XenServer, and that we followed at the time as it was probably made in order to support newer cards) was not without drawbacks. 0nelight created this issue in xcp-ng-rpms/microsemi-aacraid open Microsemi Adaptec Series-8 Card not working in XCP-NG 8.3 #2

Hi @champagnecharly , On the XO side, it seems that this PCI has an empty string ID, which doesn't enable us to delete it. We'll have to do some tests to find out how to prevent that. We might have trouble reproducing the issue, so would you mind helping us with the tests? You would need to add this piece of code on file xo-server/dist/xapi-object-to-xo.mjs before the line that start with if (isHvm) { (that should be near line 475) if ((_vm$attachedPcis = vm.attachedPcis) !== null && _vm$attachedPcis !== void 0 && _vm$attachedPcis.includes('')) { warn('Empty string PCI id:', otherConfig.pci); } then restart xo-server and look at the output of journalctl, there should be some lines looking like: 2026-01-30T09:26:17.763Z xo:server:xapi-objects-to-xo WARN Empty string PCI id:

@samuelolavo Yes, I do use NUT, but I don’t want to install any additional packet on XCP-ng. The way I found leverage the SSH authorized keys restrictions, and so you only need to change one file. Thanks for the link anyway

Does it work as you wanted now? If yes, probably something we can put in our official doc! Ping @thomas-dkmt

Hi, In those cases, my first bet is a memtest to check the RAM and CPU.

@TeddyAstie Sure thing: xl_dmesg.txt Dom0_dmesg.txt DomU_dmesg.txt