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NEW QUESTION # 15
Refer to exhibit.
The RDF-ECA timer has expired.
What is the state of all the RDF links?
- A. split
- B. suspend
- C. online
- D. failed over
Answer: B
Explanation:
When the RDF-ECA timer expires, all RDF links will be in a 'Suspend' state. This is because the RDF-ECA timer is used to control how long SRDF waits for an acknowledgement from the remote array before it suspends the link. If an acknowledgement is not received within this time, SRDF assumes that there is a problem with the link or remote array and suspends the link to prevent data loss or corruption.
NEW QUESTION # 16
A drive failure has occurred at a customer environment, and a service request has been opened with customer support. A drive failure has occurred at a customer environment, and a service request has been opened with customer support.
Order the steps in sequence as part of key management.
Answer:
Explanation:
1 - Spare drive invoked against failed drive
2 - 1st entry in audit log
3 - Sparing operation is completed
4 - Key is deleted from the repository when failed drive is removed
5 - 2nd entry in audit log
6 - Key is generated for replacement drive when installed
Reference:
Dell EMC PowerMax and VMAX All Flash: Data at Rest Encryption
NEW QUESTION # 17
Which external storage can be connected to PowerMax using DX emulation?
- A. Unity
- B. Data Domain
- C. PowerStore
- D. Compellent
Answer: B
Explanation:
Data Domain is the only external storage that can be connected to PowerMax using DX emulation. DX emulation is a specialized back-end DA emulation that handles SAN attached disks. DX directors are configured on existing PowerMax front-end Fibre Channel ports and are required to be implemented in pairs for high availability. DX emulation is used to support ProtectPoint technology, which integrates primary storage with Data Domain protection storage to accelerate backup and recovery. Therefore, answer A is correct1.
B, C, and D are incorrect because they are not external storage that can be connected to PowerMax using DX emulation. Unity (B), PowerStore , and Compellent (D) are primary storage arrays that do not support ProtectPoint technology or DX emulation.
NEW QUESTION # 18
A storage administrator is investigating non-linear variations in throughput when zoning additional hosts to certain front-end adapters. They notice a certain performance characteristic having 10 identical hosts zoned to the same FA ports. After adding the 11th host, the throughput sometimes drops more than 20%.
What is the most likely cause of this behavior?
- A. I/O sizes over 128 KiB are being used on the hosts
- B. QFULL responses of the FA ports
- C. System Write Pending > 75%
- D. Average disk queue length on the hosts exceed 3
Answer: B
Explanation:
The most likely cause of this behavior is QFULL responses of the FA ports. When additional hosts are zoned to certain front-end adapters, the FA ports may not be able to handle the increased I/O requests, resulting in QFULL responses. This can cause non-linear variations in throughput and sometimes a drop in throughput of more than 20%. Reference: Dell EMC PowerMax: Service Levels for PowerMaxOS
NEW QUESTION # 19
What is a requirement for the SRDF/Metro devices for an SRDF/Metro personality swap?
- A. Must be WD on the link
- B. Must be in partitioned state
- C. Must be in suspended state
- D. Must be RW on the link
Answer: D
Explanation:
For an SRDF/Metro personality swap, the SRDF/Metro devices must be Read/Write (RW) on the link. This ensures that data can be read from and written to the devices during the swap operation.
NEW QUESTION # 20
An administrator implemented SYMACLs on a PowerMax using host-based Access IDs. The administrator is no longer able to run SYMCLI commands against the volumes belonging to a host.
What is a possible reason for this issue?
- A. Host network interface card was replaced
- B. The disks the volumes were on were replaced
- C. SYMAPI options file was manually modified with the wrong host ID.
- D. symacl -unique -passphrase was run using a different passphrase
Answer: C
Explanation:
If an administrator implemented SYMACLs on a PowerMax using host-based Access IDs and is no longer able to run SYMCLI commands against the volumes belonging to a host, one possible reason could be that the SYMAPI options file was manually modified with the wrong host ID. The SYMAPI options file contains configuration settings for Solutions Enabler, including host IDs for access control. If this file is incorrectly modified, it could prevent the administrator from running SYMCLI commands against certain volumes34. Reference: Dell EMC PowerMax and VMAX All Flash: Embedded Management, Role Based Access Control on PowerMax - Storage Intelligence
NEW QUESTION # 21
An administrator is configuring SYMACL on a PowerMax array.
What are possible ways to get a unique ID for a host system?
- A. Derived from host hardware configuration Randomly generated
- B. Derived from host-based passphrase Randomly generated by Solutions Enabler lockbox file
- C. Derived from SAN domain ID Derived from local disk configuration
- D. Derived from storage array hardware configuration From a passphrase
Answer: B
Explanation:
The SYMACL unique ID for a host system can be obtained in two ways: derived from a host-based passphrase or randomly generated by the Solutions Enabler lockbox file. The host-based passphrase is a string that the user can specify to generate a unique ID for the host. The passphrase can be entered interactively using the symacl -unique -passphrase command, or stored in a file and passed as an argument using the symacl -unique -passphrase -file command. The Solutions Enabler lockbox file is a secure file that stores encryption keys and other sensitive information. The lockbox file can also generate a random unique ID for the host using the symacl -unique command. The lockbox file must be created and initialized before using this method.
Reference:
symacl -unique : Unable to obtain unique ID for host - Dell
EMC - Symmetrix Access Control - symacl | SANSPIRE
How to identify hostname and host ID for license generation
NEW QUESTION # 22
A disaster occurred at the workload site of an SRDF/Star configuration. The administrator decides to move the workload to the Synchronous site (Site B).
What symstar command should be used before the workload switch?
- A. unpFOlecl
- B. cleanup
- C. disable
- D. halt
Answer: D
Explanation:
The symstar halt command is used to write disable devices and synchronize SRDF data to remote sites in an SRDF/Star configuration. This command ensures that all sites have a consistent copy of data before switching the workload site from one site to another. Therefore, the symstar halt command should be used before the workload switch in case of a disaster at the workload site of an SRDF/Star configuration1
NEW QUESTION # 23
An administrator is trying to view the SLO Compliance Report but is unable to find data for an issue that occurred 7 months ago.
What is the maximum retention period?
- A. Last month
- B. 6 months
- C. 3 months
- D. Last 2 weeks
Answer: B
Explanation:
The maximum retention period for the SLO Compliance Report is 6 months. This means that data older than 6 months will not be available in the report
NEW QUESTION # 24
Which is correct about Unisphere for PowerMax and Solutions Enabler permission management?
- A. Unisphere has a more explicit authentication mechanism for users Solutions Enabler uses the operating system user credentials
- B. Unisphere and Solutions Enabler permission information is maintained in separate symauth databases.
- C. Unisphere and Solutions Enabler have authorization checking disabled by default
- D. Unisphere can assign a maximum of two roles per user Solutions Enabler can assign up to four roles per user
Answer: A
Explanation:
Unisphere for PowerMax and Solutions Enabler have different ways of managing user permissions. Unisphere has a more explicit authentication mechanism for users, where each user must have a username and password to log in to the Unisphere interface. Unisphere also supports role-based access control (RBAC), where each user can be assigned one or more roles that define their level of access to the storage system resources and operations. Unisphere maintains the user and role information in a symauth database, which can be shared with Solutions Enabler. Solutions Enabler, on the other hand, uses the operating system user credentials to authenticate users. Solutions Enabler does not require users to have a username and password to run commands, but it checks the symauth database to verify if the user has the appropriate role to perform the requested operation. Solutions Enabler also supports RBAC, where each user can be assigned up to four roles that define their level of access to the storage system resources and operations.
Reference:
Unisphere for PowerMax User Management
Solutions Enabler User Management
NEW QUESTION # 25
A user can create, manage, and delete PowerMax SRDF device pairs. They can also view the array information, masking objects, device information, and the defined RBAC rules. However, they are unable to create and delete SRDF groups.
Which RBAC profile has been assigned to the user's profile?
- A. RemoteRep Only
- B. Auditor and
- C. LocalRep and Monitor
- D. SecuritvAdmin only
Answer: A
Explanation:
The user has been assigned the RemoteRep role only. The RemoteRep role allows users to create, manage, and delete SRDF device pairs, as well as view array information, masking objects, device information, and RBAC rules2. However, it does not allow users to create and delete SRDF groups, which requires the StorageAdmin role. Therefore, answer C is correct.
A, B, and D are incorrect because they do not match the user's profile. SecurityAdmin (A) role allows users to manage security settings such as authentication methods, certificates, RBAC rules, and audit logs2. Auditor (B) role allows users to view array information and audit logs only2. LocalRep (D) role allows users to create, manage, and delete TimeFinder SnapVX sessions from a source device2. None of these roles allow users to create and delete SRDF device pairs.
NEW QUESTION # 26
A company has two PowerMax arrays located 100 km apart. The arrays are configured with SRDF/S over Fibre Channel.
Which Dell EMC technology improves FC replication between sites?
- A. Deduplication
- B. SIRT
- C. Fast Write
- D. Write Acceleration
Answer: C
Explanation:
Fast Write is a Dell EMC technology that improves Fibre Channel (FC) replication between sites in a SRDF/S configuration. When a write I/O is issued by the host to the R1 device, SRDF with Fast Write acknowledges the write to the host as soon as the data is stored in the R1's cache and transmitted to the R2's cache. This results in reduced latency and improved performance for FC replication between sites.
https://www.delltechnologies.com/asset/en-us/products/storage/industry-market/h17118_dell_emc_powermax_family_overview.pdf
https://infohub.delltechnologies.com/l/dell-emc-powermax-and-vmax-all-flash-srdf-metro-overview-and-best-practices-1/srdf-metro-overview/
NEW QUESTION # 27
A host is issuing I/O to a PowerMax.
What happens if the cache space fills up?
- A. I/O will be queued until an empty cache slot is available
- B. Cache is permanently flushed
- C. I/O will be serviced at the speed of the destination device
- D. Cache is temporarily disabled
Answer: A
Explanation:
When the cache space fills up, I/O will be queued until an empty cache slot is available. This is because PowerMax operates as a cache-centric architecture, where all data is passed through cache before being stored on disk. Cache is used to buffer incoming and outgoing data, as well as to support various functions such as replication and data reduction. When cache is full, the array cannot accept any more data until some cache slots are freed up by flushing data to disk or invalidating stale data. Therefore, answer B is correct.
A, C, and D are incorrect because they do not describe what happens when cache space fills up. I/O will not be serviced at the speed of the destination device (A), as this would bypass the cache and degrade performance. Cache is not permanently flushed or temporarily disabled (D), as this would result in data loss or corruption.
NEW QUESTION # 28
A customer's security administrator needs to configure Access Control.
What must they do prior to performing this operation?
- A. Log in to the host as a member of the AdminGrp
- B. Configure Access Controls for internal system user and Guest OS
- C. Define the User Access ID for the Admin User
- D. Enable SYMACL on the Management Module Control Station
Answer: C
Explanation:
Before configuring Access Control, the security administrator must define the User Access ID for the Admin User. This is a necessary step to ensure that the administrator has the necessary permissions to perform this operation.
PowerMax & VMAX All-Flash Storage Technical Documentation, Dell EMC PowerMax and VMAX All Flash: Embedded Management
NEW QUESTION # 29
A three-brick PowerMax 8000 is running PowerMaxOS 5978.444.444. The system is configured with Flash Drives RAID 5 (7+1). The customer wants to expand the capacity with SCM drives.
Which minimum configuration is supported?
- A. 1x RAID 5 (7+1) added to brick one
- B. 3x RAID 5 (7+1) added to each brick
- C. 1x RAID 5 (7+1) added to each brick
- D. 2x RAID 5 (7+1) added to brick one
Answer: C
Explanation:
When expanding the capacity of a three-brick PowerMax 8000 running PowerMaxOS 5978.444.444 configured with Flash Drives RAID 5 (7+1) with SCM drives, the minimum supported configuration is 1x RAID 5 (7+1) added to each brick. This ensures that each brick has additional capacity and maintains the balance of storage across all bricks2. Reference: Dell EMC PowerMax Family Product Guide PowerMaxOS, Dell PowerMax Family Site Planning Guide PowerMax 2000 and PowerMax 8000, POWERMAX FAMILY PowerMax 2000 and 8000 - Dell Technologies Partner Portal
NEW QUESTION # 30
Refer to the exhibit.
What should be done first to recover from this Concurrent SRDF/Star configuration failure?
- A. Reset the 1st Target Site
- B. Switch to the 1st Target Site
- C. Reset the 2nd Target Site
- D. Disable Star
Answer: B
Explanation:
In a Concurrent SRDF/Star configuration failure, the first step to recover is to switch to the 1st Target Site. This is because in a Concurrent SRDF/Star configuration, there are two target sites and one source site. If there's a failure, the source site can switch to either of the target sites based on the business continuity plan1. Reference: Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide
NEW QUESTION # 31
Alerts are required to track high I/O response times for a specific storage group. I/O Response times greater than 10 ms require next day analysis. I/O response times greater than 15 ms require immediate intervention.
Which alert settings are required?
- A. 1st level - Informational, 10 ms. 2nd level - Warning, 15 ms
- B. 1st level - Warning, 10 ms 2nd level - Critical, 15 ms
- C. 1st level - informational, 9 ms 2nd level - Warning, 14 ms
- D. 1st level-Warning, 11 ms 2nd level - Critical, 16 ms
Answer: B
Explanation:
The alert settings required are a first level warning at 10 ms and a second level critical alert at 15 ms. These settings will ensure that high I/O response times for a specific storage group are tracked and appropriate actions are taken when the response times exceed the specified thresholds. Reference: Dell EMC PowerMax: Service Levels for PowerMaxOS
NEW QUESTION # 32
An organization has PowerMax systems on three sites. They plan to implement SRDF/Star to provide remote protection.
What is a restriction for an SRDF/Star configuration?
- A. SRDF Groups cannot be shared between SRDF/Star configurations
- B. All the SRDF Groups must be defined and in suspended state
- C. All SRDF/Star device pairs must be of the same geometry and size
- D. The asynchronous PowerMax requires twice the SRDF directors compared to the two synchronous arrays
Answer: C
Explanation:
In an SRDF/Star configuration, all SRDF/Star device pairs must be of the same geometry and size. This is because SRDF/Star uses concurrent SRDF to maintain synchronous and asynchronous SRDF sessions between three arrays. The devices in these sessions must have identical geometry to ensure data consistency56. Reference: Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide, SRDF/Metro overview | Dell EMC PowerMax and VMAX All Flash: SRDF/Metro Overview and Best Practices
NEW QUESTION # 33
A storage administrator migrated an AIX host using NDM.
When they commit the migration, how is host access to the source array removed?
- A. Source volumes are set NR
- B. Old host paths are set NR
- C. Masking view is deleted
- D. Source volumes are deleted
Answer: C
Explanation:
During a Non-Disruptive Migration (NDM), when the migration is committed, the host access to the source array is removed by deleting the masking view. The masking view is a logical grouping of host initiators, storage ports, and a storage group (which contains volumes). Deleting the masking view removes the host's access to the volumes on the source array12. Reference: Dell EMC PowerMax and VMAX: Non-Disruptive Migration Best Practices and Operational Guide, VMAX/PowerMax Non-Disruptive Migration (NDM) for the IBMi host platform | Dell US Support Knowledge Base Article
NEW QUESTION # 34
SRDF/Metro is deployed in a clustered host configuration. The RDF link state is partitioned, and the R1 side has full read/write capability to the application.
What is the state of the R2 device?
- A. Has only read capability to the application
- B. Goes Not Ready to the host
- C. Bias is applied
- D. Has full read/write capability to the application
Answer: D
Explanation:
In a SRDF/Metro deployment in a clustered host configuration, when the RDF link state is partitioned and the R1 side has full read/write capability to the application, the R2 device also has full read/write capability to the application. With SRDF/Metro, both R1 and R2 devices may then appear as a single virtual device across the two SRDF paired arrays for host presentation. With both the R1 and R2 devices being accessible, the host or hosts (in the case of a cluster) can read and write to both R1 and R2 devices with SRDF/Metro ensuring that each copy remains current, consistent, and addressing any write conflicts which may occur between the paired SRDF devices23. Reference: Dell EMC PowerMax and VMAX All Flash: SRDF/Metro Overview and Best Practices, Deploying Dell EMC SRDF/Metro Smart DR with Microsoft SQL Server for Physical and Virtual Environments
NEW QUESTION # 35
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