Write back mode rather than write through mode is configured for the virtual disk hosting the host system disk. In the event of an unexpected power outage on the host, data that has not yet been flushed to disk may be lost, causing irreversible data loss on the system disk.
The Write cache policy of hardware RAID virtual disk { .labels._vd_name } on which the system disk of the host { .labels.hostname } resides is not Write through, please reconfigure it soon.
In Write Back mode, the disk writes data to the cache first and immediately returns a write success status. If the node unexpectedly powers off before the cache is flushed to disk, data may be lost directly. This may cause:
The host OS fails to start normally.
Data on the node is permanently lost.
The host did not correctly configure the physical disk write mode during ACOS deployment, causing Write Back to be used by default.
Access the host BIOS or IPMI management interface to check the write policy of the hardware RAID where the system disk resides.
In the BIOS or IPMI, change the physical disk write mode to Write Through and restart the host.
