Storage System Maintenance and Configuration

Ext3 File System Repair

• In damaged file systems within a mounted state, directly executing fsck to repair them is incorrect.
• The mount command can be used to verify if a file system is mounted in a read-only state.
• Avoid arbitrarily running fsck on a file system that's running normally.
• Collecting /varflog/message host log information can help locate file system failures.

SmartQoS Policy

• Adding a host to multiple policies is not supported; a host can only be added to one.
• Supported functions include burst flow control, flow control management, and minimum protection for QoS policies.

Huawei All-Flash Storage Products

• Huawei uses specific technologies to analyze data activity.
• This dynamically matches data activity levels with storage media characteristics.
• SmartTier technology is used for this purpose.

FC HBA Card

• FC HBA card is mainly used to connect a server to a fiber array.

Intelligent Classification Technology

• Cold data refers to data that has not been accessed for a long time.
• Intelligent classification technology is deployed on devices with various media types.
• Data is monitored in real time and classifies data based on access frequency.

SAS Protocal Architecture

• In the SAS protocol, the port layer describes the interface between the link layer and the transport layer.

Unified Management Tools

• eSight supports multi-vendor device adaptation and unified management.
• This includes server, storage, and network devices, along with OS and virtual resources.
• It has a componentized architecture, enterprise operation, and a maintenance platform.
• It has lightweight, Web-based features for reduced maintenance and upgrade costs.

Huawei OceanStor Dorado V6 series products

• The disk enclosure positioning indicator light glows blue.

Alarm Information Threshold

• A dump can be set to prevent data loss when the capacity of alarm information surpasses the defined threshold.

Storage Virtualisation

• Storage virtualization hides complexity, breaks physical capacity limits and integrates existing functions.
• Displaying information about hardware changes is not a feature of storage virtualization.

Equipment Power-On Sequence

• The correct power-on sequence is: External power supply -> controller box power -> server power -> switch power.

IP SAN Message Conversion

• In IP SAN, a TOE NIC can complete IP message conversion.

iSCSI Request Processing

• With an iSCSI-supporting HBA card, SCSI instructions are processed on the HBA card.

SAN Active-Active Solution

• Incorrect amount of data is lost when a single storage or production center fails, indicating a small amount of data is lost
• SAN active-active solution provides gateway-free architecture for high availability
• Can smoothly upgrade to a two-site three-center solution using HyperReplication feature
• Meets business RTO = 0, RPO = 0 requirements

iSCSI Initiator Implementation Performance

• iSCSI HBA cards offer the highest performance, followed by TOE cards, and then software initiator drivers.
• Performance order from high to low: iSCSI HBA card > TOE Card > Software Initiator Driver.

Data Center Storage Maintenance

• A bank employee (Xiao A) needs to check SmartKit installation, eService installation/configuration, and alarm policy configuration.
• These must be done in the first maintenance project of data center storage.

Storage Device Routine Inspection

• Restarting a storage device is the wrong operation when an alarm occurs during routine inspection.
• Proper actions include checking system performance, business status, and indicator status, and handling related exceptions/abnormalities.

SmartQoS Configuration

• If a user doesn't configure the priority for a LUN or file system, the default is low when configuring SmartQoS.

DME Protection Automation

• Replica Quota is NOT a protection automation feature in DME Storage.
• Protection automation features in DME Storage includes visible copy, copy creation, and replica enablement.

Huawei OceanStor Dorado V6 Scale-Out

• PCIe Scale-Out is the scale-out expansion technology used.

RDMA Direct Transfer

• Compared to traditional DMA, RDMA enables direct transfer of cache between application software at two endpoints.

Disk Reconstruction During Inaccessibility

• Restore and reconstruct is for writing to inaccessible disks.

Storage Pool Virtualized Data

• Virtualized data is made up of metadata volume and data volume
• Does not contain DCL in the metadata.

iSCSI Protocol

• Does not include iSCSI within a TCP message.
• Is a SCSI instruction set that runs on top of the IP protocol
• It includes, iSCSI Header, TCP Header, IP Header, and iSCSI data.

Huawei OceanStor SmartMigration Configuration

• Configure Thick LUN A and Thin LUN B to belong to the same controller and use LUN A as the target and LUN B as the source.

Huawei OceanStor Dorado Reliability

• All SSD hard drives and advanced data protection technologies contribute to reliability.
• RAID2.0+ underlying virtualization helps achieve high reliability.

Data Access Waiting Time

• Average seek time defines the wait for required data after the head moves.

SSD Controller Chip

• An SSD controller chip can determine read/write positions.
• It has a built-in FTL algorithm, supports interfaces, and supports multiple media types,.

SmartCache Pool Media

• SCM disks can make up a SmartCache Pool in Dorado V6

IP SAN vs. FC SAN

• FC SAN is not compatible with all IP network devices.
• IPSAN has lower cost and uses existing IP networks.
• FC SAN is more expensive.

NAS Architecture

• NAS is based on file-level sharing which eliminates the need to create multiple file servers
• It enables customers to share files quickly with storage management overhead
• UNIX and Windows users can share data directly through NAS

OceanStor Pacific Block Storage

• Storage Network Layer isn't included in the OceanStor Pacific block storage system.

Load Balancing Configuration

• Use parameter 0 in the command for load balancing between controllers.
• upadm set workingmode=[ ]

RAID Tolerance

• RAID 6 can tolerate the largest number of failed hard disks out of these options.
• eight 2TB hard disks are being used

Hard Disk Striping

• The number of stripes in a disk group defines stripe width.

RAID Type Selection

• To meet the needs of better data security and greater than 60% storage space utilization for a company, RAID 6 should be chosen.

FC Network vs. SCSI

• FC's advantage over SCSI is improved scalability and transmission distance.
• Cost reduction and solving security issues are not advantages.

iSCSI Data Packet

• The iSCSI package is transmitted in the IP network.

SSD Composition

• Solid State Drive (SSD) is mainly composed of a control unit and a storage unit and does not include NAND flash particles.

Performance Monitoring Focus

• In performance monitoring, prioritize IOPS for small I/O application scenarios.

Huawei Service Support

• eService is the software used for the management of alarms and reporting to Huawei.

Replication Pair Creation

• "Normal" will be displayed.
• "Master and slave resource data are consistent, no synchronization required"

Minimum Bandwidth Requirement for Replication

• An off-site disaster recovery center with a distance of 1000KM.
• Daily business growth is 2GB, the data synchronization time is up to 8 hours per day, and the bandwidth utilization rate is about 70%.
• The minimum bandwidth required for a remote replication network is 834KBps.

Payroll Data Type

• Payroll data in MySQL is structured data.

File-Level Sharing Architecture

• NAS can provide file-level sharing for hosts.

Hyper CDP limitations

• Hyper CDP consistency group DOES NOT support synchronization

All-Flash Storage Compression

• Lossy compression is not supported for all-flash storage.

Thin LUN Description

• Capacity is not the actual physical space.

Thick vs Thin LUN

• Data is reclaimed for space in thin, but not thick LUNs
• At the smallest granularity, thin is Grain, and Thick is Extent
• Thick LUNs do not need to apply for space every time data is written

Not a Data Processing Step

• Sorting is not a basic step in data processing, other than input, processing, and output.

NVMe Standard

• The emergence of the NVMe standard mainly solves the problem of Compatibility issues between different PCIe standard hardware interfaces.

OceanStor Pacific 9950 SSD Support

• The OceanStor Pacific 9950 supports a maximum of 80 NVMe SSDs.

RDMA Network Basis

• Both RoCE and iWARP are based on Ethernet.

PCIe Protocol Structure Exclusion

• Presentation layer is not in the device hierarchy.

Smart Acceleration Feature

• Smart Acceleration features do NOT have dependencies between their tier/cache.
• It includes Tier/Cache Integration.
• It includes a quota for the performance layer system.
• The performance layer does not need to be exclusive

RDMA Transport Offloading

• RDMA shifts packet routing offloading to the chip level.

HyperClone Features

• HyperClone DOES support consistency groups

OceanStor UltraPath Functions

• Storage resource allocation cannot be implemented
• Path selection between host and storage device is possible
• Controlling access to storage devices is possible
• Improve the path reliability between the host and storage devices is possible

HyperClone

• HyperClone makes a full data copy of the source LUN.

CIFS and NFS Protocol

• CIFS requires additional software on host and NFS is used for Linux hosts.
• NFS does NOT automatically restores the link when a link fails
• CIFS does NOT offer easy use

RDMA Descriptions

• A low response is not correct for RDMA, which has high throughput and low latency with less CPU usage.

DeviceManager License Management

• Unable to load the license files.

DeviceManager Interface Logs

• The DeviceManager interface uses DHA operation logs for hard disk operation logs, I/O statistics, SMART and other log information.

OceanStor Pacific Access Control Policy

• Role-Based Access Control (RBAC) used.

Huawei Storage Snapshots

• Overwriting during redirection write process will cause reallocation of space.

Storage System Version Query

• The show system general command queries the version.

HyperCDP Minimum Interval

• Three seconds is the minimum.

Virtual Port in Storage Systems

• Logical port fits description

Scale-Up and Scale-Out Methods

• Scale-Out increases node count, but focus is NOT on increasing the performance of a single node.

Snapshot Restoration

• Restore data to the 11:00 snapshot to minimize data loss.

Dual-Controller HA Mode

• Other controller is in a "waiting, synchronizing, and monitoring" state.

Multi-Path Selection Algorithm

• Polling algorithm will select each path in turn to send I/O data.

Software System Availability Calculation

• With failures on day 10 (1 hour), day 25 (4 hours), and day 80 (1 hour) of a 100-day operation: Software availability = 99.75%

Edge IT Infrastructure Solution

• Huawei Edge Data Storage fits the description.

ICT Infrastructure Descriptions

• Servers are usually used to refer to computers with higher specifications in some enterpises.
• These computers usually install some important software in the enterprise and run important business

OceanProtect Backup Storage Features

• OceanProtect backup storage does not include Warm data and warm archive.

Disk Domain LUN Count

• When there are 96 disks in a disk domain of hybrid flash storage, the total LUN count should be less than 12.

Data Compression Wrong Characteristics

• Data Compression does NOT lead to loss of some data information, unlike reorganization of the data

NFS Details

• NFS does NOT only allow clients with the same operating system to share files.
• NFS uses independent transmission and TCP/UDP
• NFS is a network file-sharing protocol commonly used in Linux/Unix environments
• NFS uses a client/server architecture

Backup Networking Method

• Use 10 GE lan-base for daily 1-2T backup in 3 hours.

OceanStor Dorado FE 25Gb RoCE Module

-Connecting it to the application server is supported

Data Definition

• Data is NOT information that has been processed and has logical relationships
• Data Can be entered into computer
• Data is general term of letters that have meaning
• Data can be input into a computer for processing

Backup Strategy Recommendation

• A differential incremental backup is a good choice.
• The company's backup data volume is small and maximizes storage in a short time

Required Backend Capacity Calculation

• Initial backup capacity is 1TB, and the average data increment is 10GB = 5940GB

DAS vs SAN

• DAS is NOT an external device.

OpenStack Connectivity & Drivers

• Huawei distributed storage uses Cinder to connect to OpenStack.

Intelligent Many-Core Technology

• Multi-stream partitioning tech is a type of intelligence many-core tech.

Incorrect Storage Services Details

• CIFS/NFS are C/S mode and deployment on the same network is supported.
• Support AD domain environment and non-domain environments

Huawei Hybrid Flash Storage

• If the disk usage is to high so the system will add to to the low priority I/O to control it and to ensure that it can affect the high priority

Storage Size

• Centre A = 3000G data, Centre B = 1500G data, dedupe rate is 3, centre B copes to A how much space is needed - 3500 is correct.

Querying License Settings

• The show license command is used to query the function configuration information of the license file, after being imported into the storage system.

Not Supported By LUN Migration. "

Which of the following application solutions is not supported by LUN migration? " A. Change the RAID level of a LUN B. Change the WWN of a LUN - This is the only option that LUN Migration does NOT support C. Change LUN type (thick or thin) D. Change the read and write performance of a LUN

RAID Group States

• A traditional RAID group, when a certain number of hard disks fail, the entire RAID group can prevent data loss, and the data recovery process has not yet started. This a demotion A. Normal work B. Demotion - This option is correct C. Invalidation D. Refactoring"

SmartQoS Objects

• Which of the following objects cannot be added to the policy - Host Group is correct!

Data Mining Unit

• During data migration, what unit does the storage pool use to identify data activity? - A. Data Block!

SSD Details

• What are in SSD drives SSD uses Flash chips as storage media, and has no data, no search time, delay time,

RAID 2.0+

• Which of the following descriptions about RAID 2.0+ is wrong? One-to-many rapid refactoring mode

Highlights maintenance and configuration aspects of storage systems. Discusses componentized architecture, device adaptation, and the role of FTP servers in alarm management. Covers power-on sequences and network architecture details.