System sub-health detection and preprocessing refers to the recovery of data in advance by detecting the failure and health status of storage media and hardware, thereby ensuring performance and reliability. Which of the following can detect the health status?
1.Hard so failure slow disk, bad block Smart information, the UNC error
2.Network card failure, speed reduction link packet loss, speed reduction, port failure, flash disconnection, packet loss
3.server service control CPU resource exhaustion, CPU frequency decreases, memory failure ALLED CHOPPED CHING
4.the SSD card failure, slow cards, bad blocks, temperature fault, capacitor failure, endurance than ethylene health threshold