Performance Degradation After Disabling Sata Physical Disk Write Cache Policy; Performance Degradation In Uefi Human Interface Infrastructure; Unable To Modify Any Feature Settings In Uefi Or Oprom; Extra Reboot During Os Installation - Dell PowerEdge User Manual

Performance degradation after disabling SATA
physical disk write cache policy
Likely Cause: Disk write operations can cause degradation in performance.
Corrective Action: To resolve this issue, enable the physical disk write cache policy.
Performance degradation in UEFI Human Interface
Infrastructure
Corrective Action: To resolve this issue, ensure that no SAS drives are connected.
Unable to modify any feature settings in UEFI or
OPROM
Likely Cause: You cannot modify the settings in UEFI or OPROM if the number of virtual disks exceeds than 16.
Corrective Action: To resolve this issue:
1
2

Extra reboot during OS installation

Description The system may reboot one extra time during the OS installation using driver-injection method.
Likely Cause: SATA in RAID mode and NVMe in non-RAID mode may cause an extra reboot on system with NVMe PCIe SSDs
during OS installation.
OS installation failing on NVMe PCIe SSD with third-
party driver
Description: Using third-party driver for NVMe PCIe SSD while NVME mode is set to RAID may cause the OS installation to fail.
Solution Third-party drivers for NVMe PCIe SSDs are not supported in NVMe in RAID mode.

System startup issues

To troubleshoot system startup issues, review the following:
44 Troubleshooting your system
NOTE: Ensure that there is constant power supply to the system (A UPS is recommended).
NOTE: If you create a virtual disk using Dell LifeCycle controller, then the physical disk write cache
policy is set to default. For more information about the physical disk write cache policy behavior, see
the Managing the physical disk write cache policy for SATA drives
Start the operating system.
Use OpenManage to ensure that the maximum number of virtual disks does not exceed 16.
section.