Storage concepts
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Questions and Answers

Which services are managed by DROS in OceanStor Pacific?

  • Block services only
  • File services only
  • Block, file, and object services (correct)
  • Object services only

In RAID technology, do soft RAID and hard RAID share the same independent processor to execute?

  • No, each implementation method has its own independent processor
  • Soft RAID uses the main CPU, while hard RAID has its own processor (correct)
  • Hard RAID uses the main CPU, while soft RAID has its own processor
  • Yes, both methods use the same processor

Regarding linked clones, what happens to the data content of a snapshot volume after the clone volume is modified?

  • All clone volumes are updated to reflect the modifications
  • The original snapshot and other clone volumes remain unaffected (correct)
  • Only the original snapshot is affected by the modifications
  • The original snapshot and other clone volumes are affected

In which stage does data belong when it is initially generated from the terminal and saved to the storage device?

<p>Data creation stage (B)</p> Signup and view all the answers

A customer needs to back up 1100GB of data within a 3-hour window. Which networking option is exclusively suitable?

<p>A network with Fibre Channel connectivity (B)</p> Signup and view all the answers

What defines a storage tier within the same storage pool?

<p>Storage media with the same performance level (B)</p> Signup and view all the answers

Which of the following describes 'information' in the context of data processing?

<p>Data with context, relevance, and purpose. (A)</p> Signup and view all the answers

If you require file storage alongside object storage in a distributed storage system, what is generally needed?

<p>Purchase of separate NAS devices (A)</p> Signup and view all the answers

What type of standard is SAS for the SCSI bus protocol?

<p>Serial (D)</p> Signup and view all the answers

Which technology provides fault tolerance in RAID?

<p>Mirroring (C), Parity (D)</p> Signup and view all the answers

In Huawei RAID 2.0+, what is the smallest unit for hotspot data statistics and migration called?

<p>Extent (B)</p> Signup and view all the answers

What does the multi-controller architecture provide compared to the dual-controller architecture in terms of power supply?

<p>Enhanced power redundancy (B)</p> Signup and view all the answers

Which protocol facilitates communication between host and disk and is managed by a controller acting as a small CPU?

<p>SCSI (B)</p> Signup and view all the answers

What are the two types of coffer disks found in storage systems?

<p>Built-in and external (C)</p> Signup and view all the answers

What is the primary function of all storage array coffer disks following a sudden power outage?

<p>Store dirty or unwritten data to prevent loss (B)</p> Signup and view all the answers

In storage device performance, what does latency refer to?

<p>The time interval from initiating an I/O request to completing the I/O processing. (A)</p> Signup and view all the answers

During a disaster recovery drill, what is the purpose of switching the business to the disaster recovery end?

<p>To prove the reliability of the disaster recovery system (A)</p> Signup and view all the answers

When reading and writing disks, what is the smallest addressing unit?

<p>Sector (A)</p> Signup and view all the answers

What is a key characteristic of OceanStor Dorado V6 series storage in terms of its components?

<p>It uses self-developed chips for its entire end-to-end stack. (D)</p> Signup and view all the answers

What is a primary benefit of SmartThin provisioning?

<p>It presents a larger capacity to the user than physically allocated. (D)</p> Signup and view all the answers

What does the multi-protocol interoperability feature (Smart The Interworking) in OceanStor Pacific series achieve EXCEPT?

<p>Directly converts data formats when accessing with different semantics. (A)</p> Signup and view all the answers

What does 'consistent splitting' in SmartMigration guarantee during LUN information exchange?

<p>Data consistency at each time point before and after the split (D)</p> Signup and view all the answers

When a host writes to a SmartThin LUN and space is not allocated, what steps are involved?

<p>Space is allocated from the Pool, a mapping established, and data written. (D)</p> Signup and view all the answers

When the Windows copy program copies a file to the file system, what is the default file system block size of Huawei OceanStor V3 storage intended to ensure?

<p>Full utilization of storage space (B)</p> Signup and view all the answers

Besides communication between host and disk, what else can the SCSI protocol be used for?

<p>Physical tape library and optical disk communication (D)</p> Signup and view all the answers

Which of the following is a characteristic of RAID 1?

<p>It exclusively uses mirror protection. (B)</p> Signup and view all the answers

In Huawei distributed storage with intelligent load balancing and partitioning, what can each partition set independently?

<p>Independent domain name and hash policy (A)</p> Signup and view all the answers

What aspect of the underlying transmission medium mainly applies to the SCSI protocol?

<p>It is essentially independent. (A)</p> Signup and view all the answers

Can a LUN and a file system exist in the same storage pool or hard disk?

<p>Yes, they can coexist in the same pool or disk. (C)</p> Signup and view all the answers

For a storage system supporting iSCSI, how transparent is the process to the host user?

<p>The user is completely unaware of the process. (C)</p> Signup and view all the answers

What happens when the hybrid flash storage device controller fails?

<p>Local switching of the controller is supported for continuous operation. (B)</p> Signup and view all the answers

What command forces the hard disk to go online from a physical level when dealing with RAID failure issues in Huawei OceanStor hybrid flash storage arrays?

<p>revive (C)</p> Signup and view all the answers

When a user belongs to multiple groups with different CIFS share permissions, which permissions are effectively granted to the user?

<p>The maximum permissions of the user group and user permissions. (A)</p> Signup and view all the answers

How is data read from a HyperCDP if hosts cannot directly map it?

<p>A snapshot copy of the HyperCDP is created and then mapped. (C)</p> Signup and view all the answers

What is the key difference in space allocation between Thick LUN and Thin LUN?

<p>Thick LUN is pre-allocated, while Thin LUN is allocated on-demand. (D)</p> Signup and view all the answers

Which type of data are images and music considered as?

<p>Unstructured data (C)</p> Signup and view all the answers

What term refers to the process of replacing, adding, upgrading, or removing hardware devices without shutting down the system?

<p>Hot plugging (A)</p> Signup and view all the answers

In a backup system architecture, which component typically needs to be traversed before data reaches the storage system?

<p>The backup data center media server (B)</p> Signup and view all the answers

When creating HyperClone in Huawei Ocean hybrid flash systems, what additional configuration step is mandatory?

<p>Configuring HyperClone consistency (D)</p> Signup and view all the answers

In Huawei RAID2.0+, what does CKG refer to?

<p>A logical storage unit composed of Chunks from different hard disks in different Disk Groups. (A)</p> Signup and view all the answers

What is the primary function of the control box in a storage system?

<p>Carries the controller and provides storage services. (C)</p> Signup and view all the answers

A LUN has data 'a'. A snapshot 'Snap1' is created and activated. Then 'a' is modified to 'b' in Snap1. A second snapshot 'Snap2' is created. What data will the host access when reading Snap2?

<p>Data 'a' (C)</p> Signup and view all the answers

A company adjusted its initial capacity allocation strategy to prioritize allocation from the capacity layer. Which storage tier strategy were they using?

<p>SmartTier (C)</p> Signup and view all the answers

In the backup scenario, what two methods does Huawei provide to meet customers' needs in different scenarios?

<p>Centralized backup and integrated backup (B)</p> Signup and view all the answers

When does a snapshot copy contain the private data of the snapshot after the source snapshot is activated?

<p>At the moment of snapshot creation (D)</p> Signup and view all the answers

In terms of storage space allocation of write and read operations, describe the relationship between Direct-on-time and Capacity-on-write.

<p>Storage space allocation on write is Direct-on-time, and read-write data-redirection is Capacity-on-write (B)</p> Signup and view all the answers

In storage devices utilizing RAID2.0+ technology, when a disk experiences failure, how is the lost data reconstructed?

<p>Valid data will be reconstructed from all disks in the resource pool except the failed disk. (C)</p> Signup and view all the answers

What is the primary characteristic of a snapshot?

<p>It's a consistent copy of the source data at a certain point in time. (A)</p> Signup and view all the answers

Flashcards

OceanStor Pacific's DROS

DROS does not manage block services.

RAID Implementation Processors

Soft RAID and hard RAID share the same processor.

Block Service Linked Clones

Data modifications to the clone volume will not affect the original snapshot and other clone volumes.

Data Generation Stage

Data generated from the terminal and saved to the storage device belongs to the data storage stage.

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Network Choice

GE network can choose either LANFree or LAN-based networking.

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Storage Tier

In a storage pool, the storage tier is a collection of storage media with the same performance.

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What is Information?

Information includes data with context, relevance, and purpose.

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Distributed Storage

Distributed storage can use cloud system storage for object storage and needs NAS for file storage.

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SAS Protocol

SAS is the serial standard for the SCSI bus protocol.

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RAID Fault Tolerance

Not all RAID types provide fault tolerance through mirroring.

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Huawei RAID 2.0+ Extent

Extent is the smallest unit for hotspot data statistics and migration in Huawei RAID 2.0+.

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Multi-Controller Architecture

Multi-controller architecture can deploy 4 power modules, which improves power supply redundancy.

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SCSI Protocol

SCSI protocol is the communication protocol used between host and disk.

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Coffer Disk Types

There are two types of coffer disks: built-in and external.

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Coffer Disk Functionality

Not all storage array coffer disks have the function of storing dirty data after a sudden power outage.

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Storage Device Latency

Latency refers to the time interval from initiating an I/O request to completing the I/O processing.

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Disaster Recovery Drill

During a disaster recovery drill, the business will be switched to the disaster recovery end.

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Disk Addressing Unit

When reading/writing, sectors are the smallest addressing unit.

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OceanStor Dorado V6

OceanStor Dorado V6 series storage uses self-developed chips for the entire end-to-end stack.

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SmartThin Capacity

SmartThin presents a larger capacity form than the allocated physical space.

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OceanStor Pacific Interoperability

OceanStor Pacific series does not feature multi-protocol interoperability.

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SmartMigration Splitting

Multiple pairs exchange LUN information to cancel the pair relationship.

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SmartThin LUN

SmartThin LUN allocates space if it is not allocated.

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OceanStor V Block size Default?

V3 storage system block size is not the default.

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SCSI Protocol Communication

SCSI communicates to disk, tape library, optical disk, etc.

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RAID Data Protection Methods

RAID 1 uses mirroring.

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Domain names aren't independent.

Partitions cannot set an independent domain name and policy.

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SCSI Protocol Independence

SCSI is independent of the underlying transmission medium.

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LUN and File System

LUN and file systems can be in the same pool or disk.

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iSCSI Transparency Myth

In iSCSI, the process is not transparent to the user.

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Flash failure

Local controller switching not supported.

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Command revive

Hard disk from physical level.

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Highest permission.

User permissions.

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Hyper cdp

Need direct host access.

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LUN allocation

Thick and thin allocation.

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Images and music are unstructured data.

Audio unstructured.

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Hotplug

Must notify.

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Data back.

Media server transfer.

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Create hyperclone

Flash configuration.

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Study Notes

  • OceanStor Pacific does not use DROS to manage block services, file services, and object services.
  • RAID technology has two implementation methods: soft RAID and hard RAID, but each method does not have its own independent processor.
  • Block service provides a linked clone mechanism for creating multiple snapshots based on a clone volume.
  • The initial data content of each snapshot volume matches the clone volume's content.
  • Subsequent changes to the clone volume do not impact the original snapshot or other clone volumes.
  • Data generated from the terminal and saved to a storage device is not part of the data migration stage.
  • For a customer with 1100GB of data and a 3-hour backup window, GE network isn't limited to only LANFree networking.
  • In the same storage pool, the storage tier consists of storage media with the same performance level.
  • Information is not unprocessed data, and it includes context, relevance, and purpose.
  • Distributed storage doesn't exclusively use cloud system storage, and require separate NAS devices for file storage.
  • SAS is the serial standard for the SCSI bus protocol.
  • Not all RAID types offer fault tolerance through mirroring technology.
  • In Huawei RAID 2.0+, extent is indeed the smallest unit for hotspot data statistics and migration.
  • Multi-controller architecture has a control frame that deploys 4 power modules, enhancing power supply redundancy, compared to the dual-controller architecture.
  • SCSI protocol serves as the basic protocol for communication between host and disk and is operated by a SCSI controller with its own command set and cache.
  • Two types of coffer disks exist in storage systems: built-in and external.
  • Not all storage array coffer disks store dirty data after a power outage.
  • Latency in storage device performance is the time between initiating an IO request and its completion.
  • During a disaster recovery drill, the business switches to the disaster recovery end, and simulation testing verifies the system's reliability.
  • Sectors are not the smallest addressing unit when reading/writing disks, and data cannot be written to partial sectors consecutively.
  • OceanStor Dorado V6 series storage utilizes self-developed chips for the entire end-to-end stack, ensuring stable, high-performance with low latency and high throughput.
  • SmartThin doesn't pre-allocate all space and presents a larger capacity form to the user than physically allocated.
  • OceanStor Pacific series does not feature multi-protocol interoperability named Smart The Interworking.
  • Consistent splitting of SmartMigration involves multiple pairs exchanging LUN information simultaneously and canceling the pair relationship to maintain data consistency throughout.
  • When a host service writes to a SmartThin LUN and space is unallocated, the system allocates storage space from the Pool using Capacity-on-write and establishes a mapping with Direct-on-time technology before writing data.
  • When the Windows copy program copies local files, the file system block size of Huawei OceanStor V3 storage system is not the default, which impacts storage utilization.
  • SCSI protocol facilitates communication between hosts and disks, as well as between hosts and physical tape libraries or optical disks.
  • RAID has two data protection methods, with RAID 1 using mirror protection.
  • Intelligent load balancing and partitioning in Huawei distributed storage doesn't allow each partition to set an independent domain name and hash policy.
  • The SCSI protocol operates independently of the underlying transmission medium.
  • A LUN and file system can exist in the same storage pool or hard disk.
  • In an iscsi-supported storage system, the process from a host sending a data request to receiving data is not transparent to the user.
  • Local controller switching isn't supported during a hybrid flash storage device controller failure.
  • When addressing RAID failure issues in Huawei OceanStor hybrid flash storage arrays, the "revive" command forces a hard disk online from a physical level.
  • When assigning permissions to CIFS shares, the user's effective permissions are the maximum of the user group and user permissions, if a user belongs to different user groups.
  • HyperCDP does not support direct mapping of hosts, so snapshots are used.
  • Thick LUNs are allocated once, while Thin LUNs are allocated on demand in space allocation.
  • Images and music are unstructured data.
  • Hot plugging refers to replacing, adding, upgrading, and removing hardware devices without system shutdown, requiring notification for PCIE due to its "no surprise" strategy.
  • The backup data center in a backup system needs to go through the media server before transferring to the storage system.
  • Huawei Ocean hybrid flash systems create HyperClone and require configuring HyperClone consistency during creation.
  • In Huawei RAID2.0+, CKG is not a logical storage unit composed of Chunks from different hard disks in different Disk Groups.
  • The control box holds the controller and provides storage services, forming the core of the storage system.
  • Given a LUN with data 'a', a Snap1 snapshot is created and activated
  • If the host modifies data 'a' to 'b' in Snap1, then creates Snap2, accessing Snap2 returns data 'b'.
  • When using SmartTier, adjusting initial capacity allocation to prioritize the capacity layer, may not improve performance if frequent I/O requires frequent access.
  • Huawei provides centralized and integrated backup to meet customer needs in different scenarios.
  • A snapshot copy contains source data at snapshot activation, but it doesn't necessarily contain private data.
  • Storage space allocation on write is not Direct-on-time, and read-write redirection is not Capacity-on-write.
  • In RAID2.0+, when a hard disk fails, valid data is not reconstructed to all disks in the resource pool except the failed one.
  • A snapshot is a consistent copy of source data readable by the host and usable as a data backup at a specific point in time.

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OceanStor Pacific architecture and RAID tech. Block service & linked clones mechanism. Storage pools contain storage media with the same performance level. Information includes context, relevance, and purpose.

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