Regarding server RAID cards, the correct statement is:

• A.When using FBWC, data retention time does not exceed 72 hours. If the phone is disconnected, the server recovery data must be flashed to the hard disk as soon as possible.
• B.write back mode, data will be written directly to the disk, high security
• C.Server disks do not require array cards to be used for RAID0
• D.The array card cache must be used with a cache battery, otherwise there is a risk of data loss after a power outage

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Which of the following statements about CAS characteristics is correct:

• A.V2V supports converting virtual machines in various formats such as VMware, Citrix, KVM, etc. into H3CCAS virtual machines
• B.When a server fails, DRS can automatically select a space server and restart the VM on an idle server.
• C.DRX takes into account the virtual machine CPU, memory, I/O throughput load factors and the virtual machine's affinity to the physical host to dynamically adjust the distribution of business loads and improve system availability.
• D.HA takes into account the virtual machine CPU, memory, I/O throughput load factors and the virtual machine's affinity to the physical host to dynamically adjust the distribution of business loads and improve system availability.

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Which of the following statements about virtual machine cloning is incorrect?

• A.Virtual machine cloning methods include normal cloning, fast cloning and full cloning.
• B.Cloning is only allowed within the same CVK host
• C.The cloned virtual machine has the same operating system, application system and data as the original virtual machine, and the MAC address of the virtual network card is also the same.
• D.The default IP address acquisition method for the cloned virtual machine is DHCP, so there will be no address conflict problem

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Which of the following statements about cluster HA is incorrect?

• A.Shared storage is required to implement HA
• B.The cluster enables HA, which can ensure business continuity even when both the server and the shared file system fail.
• C.After HA is enabled, when a host in the cluster fails, the system can select an idle server and restart the VM on the failed host on the idle server
• D.Hosts that implement HA in the cluster need to mount the same shared storage

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The two virtual machines across the host are not connected. The possible reason is

• A.Virtual switch forwarding abnormality
• B.The physical switch VLAN and other information are configured incorrectly
• C.Virtual machine network policy template configuration error
• D.The virtual machine operating system firewall blocks the message sending and receiving, resulting in abnormal message sending and receiving

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