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Which of the following feature is correct about the OceanStor V3volume mirroring? (Multiple choice.)

A.

After creating a mirrored volume for a normal LUN, the server read-write IO results in a change as a result of internal information exchange.

B.

The amount of data actually stored on a LUN is 2G, the total copy of the data is 4G. A volume image is created for the LUN, the LUN is mirrored when the copy is generated during system creation.

C.

You can configure a volume mirror for external LUNs or configure external LUNs as mirror copies.

D.

When configuring volume mirroring, mirror copies are required from different disk domains.

Which of the following description is correct about simpana backup software snapshot? (Multiple choice.)

A.

Pause the app before the snapshot, go to the hardware storage snapshot to trigger a common snapshot with application consistency.

B.

Backup software snapshot function can automatically find the storage volume of the file system, database, mail system.

C.

Background snapshots can be indexed to ensure application recovery and small particle recovery.

D.

Snapshots backup can be offline, the backup server almost has no impact.

What are the design information research activities in a backup solution? (Multiple choice.)

A.

Customer needs collection and refining

B.

Backup capacity calculation

C.

Project background research

D.

Network environment is collected

Which of the following is the wrong mode of operation when checking on a problem with the VMFS datastore for ESXi5.5 using the VMware ondisk metadata analyzer (VOMA)? (Assume the LUN NAA ID is naa.60022a110009a8a800042e1800000000: 1).

A.

Turn off the power of all running virtual machines or migrate these virtual machines to another data store

B.

Use the esxcli storage vmfs extent list command to obtain the name and partition of the vmfs data store tobe backed up after the provision of number of the supported devices.

C.

voma -m vmfs -f check -d /vmfs/devices/disks/naa.60022a110009a8a800042e1800000000:1

D.

voma -m vmfs -f check -d naa.60022a110009a8a800042e1800000000: 1

An Oceanstor V3 system "alert" shows a message: "SPF [0] LOW Rx power alarm because Low Rx pow ALM of SFP0 is deleted/deflected. "Thecause of the malfunction is:

A.

Equipment distribution voltage is insufficient, the device into a stream of electricity.

B.

The power module is not enough power to replace the power module.

C.

The voltage of the board is low or the light receiving poweris low.

D.

Optical module port card loose connection.

Maintaining a persistentconnection between host and storage, ESXi must support multipathing. Which of the following statements is incorrect regarding multipathing for VMware vSphere 5.5?

A.

In addition to path failover, multipathing also provides load balancing. Load balancing is the process of distributing I / O load across multiple physical paths.

B.

In the event of a path failover, the virtual machine I / O delays Nintendo pump by 60s.

C.

If the failover takes a long time to complete, the windows virtual machine may interruptthe I / O and eventually fail. To avoid this, set the windows virtual machine timeout to at least 30 seconds.

D.

When coordinating vmware NMP and any installed third-party MPP, the PSA (Pluggable Storage Architecture) performs load and unload multipathingplug-ins and handles physical path discovery and removal.

In the scenario of protecting the database, the slave uses the virtual snapshot method to verify the services of the production end andthe DR-side and discover the data of the DR on the disaster recovery end. What are the possible reasons that the library can not start normally? (Multiple choice.)

A.

After a snapshot of the LUN of the redundancy site is created, the snapshot is not activated at the same time.

B.

Disaster recovery side of the data stored in the cache, not yet written to the hard disk.

C.

When creating a snapshot on the disaster recovery end LUN, the production end is copying data to the disaster recovery end.

D.

The production end and disaster recovery end adopt the disaster recovery solution of incremental LUN copy, and the incremental data link is abnormal during the synchronization.

Database applications are one of the important applications supporting storage arrays.

Different application configurations and parametersettings may affect the service performance. In order to store arrays (such as OceanStor V3 series storage) with SQL server applications with the best performance, which of the following statements is wrong:

A.

OLTP database generally have a large numberof random write, it is recommended to choose RAID 10 to store data.

B.

In order to improve write performance, all SQL server database data stored in the LUN write strategy is configured to "write back the image".

C.

Because the size of the SQL server pageis 8K, in order to ensure the best performance of the database, NTFS allocated block size should not be less than 8KB.

D.

SQL Server database instance memory size and recovery mode of choice has no effect on the performance of the database.

Which of the following is correcting regarding the read and write performance of the Huawei Oceanstor 9000 node, from highest to lowest?

A.

P25 Node SSD Hard Drive> P25 Node SAS Hard Drive> P36 Node SATA Hard Drive> P12 SATA Hard Drive> C36 SATA Hard Drive

B.

P25 Node SAS Hard Drive> P25 Node SSD Hard Drive> P36 Node SATA Hard Drive> P12 SATA Hard Drive> C36 SATA Hard Drive

C.

P25 Node SSD Hard Drive> P25 Node SAS Hard Drive> P36 Node> C36 SATA Hard Drive> P12 SATA Hard Drive

D.

P25 Node SSD Hard Drive> P25 NodeSAS Hard Drive> C36 SATA Hard Drive> P36 Node SATA Hard Drive> P12 SATA Hard Drive

If a customer needs to install the simpana file system using the backup client on the production system server, which of the following configuration is essential? (Multiple choice.)

A.

In the backup client Tianjin ah master server resolution.

B.

Add a resolution of the media server on the backup client.

C.

When the master server adds the resolution of the backup client.

D.

Add a resolution of the storage media to the media server.