Huawei H13-611_V4.5 - HCIA-Storage V4.5

RAID 0 is a data striping technique that involves distributing data across two or more disks, which allows for increased performance and capacity. RAID 0 does not provide redundancy, and if any of the disks in the RAID group fail, the data will be lost. RAID 5 and RAID 6 are both data striping techniques, but they also provide redundancy, which means that the data is still recoverable even if one or more disks in the RAID group fail. RAID 1 is a data mirroring technique, which involves writing the same data to two disks, and does not use data striping.

A and C are true statements about the ports of a Huawei OceanStor all-flash storage device. Bond ports, VLANs, and logical ports are created based on available Ethernet ports, while multiple Ethernet ports of the same controller are bonded to form a bond port to increase the bandwidth. The networks and services between VLANs are physically isolated, which improves the security and reliability of service data. Multiple logical ports can be created for a bond port, but only one logical port can be created for an Ethernet port.

A failover group is a combination of ports that are used for IP address failover in a storage system, and IP address failover ensures service continuity and improves the reliability of paths for accessing file systems. IP address failover applies to all storage network architectures, not just IP SAN. Fallback means that the standby port takes over services when the active port fails, and then the active port takes over services again after it recovers.

The correct answers are A. SmartMigration and D. HyperClone. SmartMigration and HyperClone are features designed to manage storage and do not directly address the performance requirements of online services. SmartTier and HyperMetro are features designed to address performance requirements by tiering storage based on data access frequency and allowing for the replication of data across multiple sites.

Distributed storage systems are designed to support horizontal scaling, which means adding more nodes to the system to increase both computing capability and storage space. This enables the system to handle large amounts of data and large numbers of users. Distributed storage systems also support storage resource pooling and virtualization, which allows for efficient use of storage resources and easy management of storage.

Quality of Service (QoS) is a set of technologies used to ensure that network traffic is allocated resources according to predetermined priorities. The three main working principles of QoS are I/O Priority Scheduling, I/O Performance Assurance, and I/O Flow Control. I/O Latency Burst is not one of the working principles of QoS.

The most widely used Fibre Channel (FC) topology is the FC Switched Network. This topology uses a centrally managed switch to create a network of connected devices, allowing them to communicate with each other. This type of topology is highly scalable, as additional devices can be added to the network without any reconfiguration. It also provides higher performance than other topologies, as it can route data more quickly and efficiently.

If there are writes to the source LUN during a snapshot rollback, the rollback is performed before the writes are complete. This means that any data written to the source LUN during the snapshot rollback will be lost, since it will be overwritten by the snapshot data.

In storage, a hot spare is a spare disk that is pre-configured and ready to be used to rebuild data in the event of a disk failure in a RAID array. When a disk failure occurs in a RAID array, the data that was stored on the failed disk is rebuilt using the data from the remaining disks and the hot spare. The rebuild process is done automatically by the RAID controller, and it is done in a way that does not disrupt the normal operation of the RAID array. The hot spare disk is usually kept in a powered-on and ready state, so that it can be used immediately in case of a disk failure. It is also known as "hot spare disk" or "hot spare drive".

A disk domain is a collection of physical disks of the same type and speed. If a disk domain has multiple disk types, it is not necessary that the storage pools within that disk domain have multiple disk types as well. Storage pools are a collection of physical disks within a disk domain that are grouped together to provide storage capacity. The storage pools can be created with different RAID levels and disk types, so it is possible to have a disk domain with multiple disk types and still have storage pools with only one disk type. It depends on how the administrator wants to configure the storage pool and how the storage is used.