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Dell Midrange Storage Solutions Design 2023 D-MSS-DS-23 exam free
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Full version: D-MSS-DS-23 Exam Dumps Questions
1.A solutions architect must present two different Dell PowerStore options to a customer Both options
must contain 90 TB raw in the smallest drive configuration possible A 3000T and a 9000T are the two
models requested. The customer wants to know the minimum drive count necessary to perform a
capacity upgrade
Which solution should be recommended?
A. A 6x 15 TB drives in the 3000T and 6x 15 TB drives in the 9000T both requiring upgrades in six
drive increments
B. 6x 15 TB drives in the 3000T and 12x 7 TB drives in the 9000T both supporting single drive
upgrades
C. 6x 15 TB drives in the 3000T and 6x 15 TB drives in the 9000T both supporting single drive
upgrades
D. 12x 7 TB drives in the 3000T and 6x 15 TB drives in the 9000T both requiring upgrades in six drive
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increments
Answer: C
Explanation:
This option provides the smallest drive configuration possible for both the 3000T and 9000T models,
and allows for single drive upgrades, which is more flexible for the customer.
2.A customer has a Dell Unity XT 380F system with a single pool that is built from 24x 800 GB and
24x 1 6 TB SAS Rash 3 drives and 14x 400 SAS Flash 2 drives.
How many drive partnership groups were used to build the dynamic pool?
A. 3
B. 1
C. 2
D. 4
Answer: B
Explanation:
In Dell Unity XT storage systems, a dynamic pool is built using drive partnership groups. A drive
partnership group is a group of drives that are combined to create a pool. A drive partnership group
can be made up of SAS, NL-SAS, or Flash drives. In this case, the customer has a single pool built
from 24x 800 GB SAS Rash 3 drives and 24x 1 6 TB SAS Rash 3 drives, and 14x 400 SAS Flash 2
drives. All drives are SAS type, and it's only one partnership group.
3.A PowerStore system has been successfully designed in PowerSizer, and the configuration must be
created for the customer.
What is the most time-efficient way to generate the proposal?
A. Export configuration in PowerSizer.
Download XML file with storage configuration.
Import XML file in Configuration tool.
B. Export configuration in PowerSizer.
Download PPTX export files.
Open PPTX file.
Copy PowerStore configuration ID.
Paste configuration number in Configuration tool.
C. Export configuration in PowerSizer.
Copy PowerStore configuration ID.
Paste configuration number in Configuration tool.
D. Export configuration in PowerSizer.
Download PPTX export files.
Import PPTX file into configuration tool.
Answer: C
4.Which parameters can be selected when sizing a Dell Unity XT 480F using the System Design
method?
A. Drive count and RAID level Percentage of random writes and reads
B. Data reduction ratio Percentage of sequential writes and reads
C. One of four workload types Drive count and RAID level
D. One of two block sizes Application type
Answer: C
Explanation:
When sizing a Dell Unity XT 480F using the System Design method, you can select one of four
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workload types and Drive count and RAID level. This workload type selection will take into account
the specific IOPS and capacity requirements of the environment. The drive count and RAID level will
determine the overall capacity and level of data protection required.
5.What is the maximum number of SAS buses per SP for a Dell Unity XT 480F without an additional
SAS I/O module1?
A. 4
B. 3
C. 1
D. 2
Answer: D
Explanation:
The maximum number of SAS buses per SP for a Dell Unity XT 480F without an additional SAS I/O
module is 2. Each Dell Unity XT 480F has 2 Service Processors (SPs) and each SP has 2 SAS
buses, for a total of 2 SAS buses per SP. SAS buses are used to connect the storage drives to the
SPs and to the storage array. Each bus can support multiple drives and provide high-speed data
transfer between the drives and the SPs.
6.What is a key feature of the Dell EMC Future-Proof Storage Loyalty Program for Dell EMC SC
Series arrays?
A. 4:1 Performance Guarantee
B. 4 Year Satisfaction Guarantee
C. 4:1 Reduction Guarantee
D. 4:1 Efficiency Guarantee
Answer: D
Explanation:
Dell EMC Flash Storage Efficiency Guarantee Dell EMC promises our flash arrays will provide a
logical usable capacity at least four times the usable physical capacity of your purchased drives ?or
we’ll give you more drives at no charge.
https://www.delltechnologies.com/en-us/blog/dell-emc-flash-storage-efficiency/
Reference: https://www.dell.com/pk/business/p/storage-sc-all-flash/pd
7.Based on best practices, what should be the first step when designing a new Dell Unity XT
solution?
A. Gather impl.bin configuration file
B. Calculate the aggregate performance of all hardware
C. Run netstat on the host
D. Meet customer and obtain Live Optics report, if applicable
Answer: D
8.Which SAS SSDs are supported by Dell EMC PowerStore?
A. 960 GB, 1920 GB, 3840 GB, and 7680 GB
B. 960 GB, 1920 GB, and 3840 GB only
C. 1920 GB, 3840 GB, 7680 GB, and 15360 GB
D. 1920 GB, 3840 GB, and 7680 GB only
Answer: C
Explanation:
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9.What is the minimum recommended amount of Flash capacity in a Dell EMC Unity 480 Hybrid pool?
A. 5%
B. 8%
C. 10%
D. 15%
Answer: A
Explanation:
The minimum recommended Flash capacity is at least 5% of the pool capacity.
Reference: https://www.dell.com/support/kbdoc/en-pk/000010691/dell-emc-unity-difference-between-
fast-cache-and-fast-vp-configurations-user-correctable
10.What are all the capabilities of a Dell Unity XT hybrid system that optimize for workload skew?
A. FAST Cache, Cache, and HDDs
B. FAST VP and Cache
C. Cache, FAST Cache, and FAST VP
D. HDDs and FAST Cache
Answer: C
11.What are benefits of having a minimum of 5% flash component when designing a Dell Unity XT
hybrid system?
A. Enhances data reduction efficiency ratios and minimizes CPU utilization.
B. Offsets some workload skew and accelerates metadata for buffer read misses.
C. Optimizes FAST Cache page granularity and speeds data movement between tiers.
D. Increases front-end queue depth and accelerates acknowledgments to hosts.
Answer: B
Explanation:
Training: Unity Design: Midrange Sizer for Unity (ESSTGD04650) > Sizing a Unity Solution > Sizing
Recommendations for Unity.
12.A customer asks you about the maximum load of their new Dell EMC SC Series array.
Which term should you use in response?
A. MB
B. IOPS
C. CPU Cycles
D. Latency
Answer: B
Explanation:
Reference: https://downloads.dell.com/manuals/common/sc-series-performance-availability-best-
practices- dell-emc-4024-bp-sc_en-us.pdf
13.What is a non-uniform distribution of I/O over storage capacity in Dell Unity XT Systems?
A. Latency
B. Response time
C. Skew
D. Throughput
Answer: C
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14.A storage administrator wants to do a tech refresh from a legacy EQL system to a new Dell EMC
SC Series array.
What is needed to correctly size the new array?
A. Latency
B. Peak IOPS information
C. Storage tiers
D. Contract support end date
Answer: B
Explanation:
https://downloads.dell.com/manuals/common/sc-series-performance-availability-best-practices-dell-
emc-4024-bp-sc_en-us.pdf (1.9 Sizing an SC Series array for performance requirements - pag.9)
15.Whatis a benefit of restoring data from a Dell EMC Unity snapshot?
A. Can select which Consistency Group members have data restored
B. Supports replication to up to 32 remote systems
C. Enables efficient storage usage with 8 KB block granularity
D. Does not require additional pool storage
Answer: A
16.A Dell PowerStore 9000X came online after being initially configured seven days ago. The
manager Ul shows capacity but no forecasting metrics
Why are forecasting metrics not being displayed?
A. Forecasting was not turned on during configuration
B. The capacity forecasting license must be installed
C. There is not enough capacity in the appliance
D. Forecasting will not display until 16 days after initial configuration
Answer :D
Explanation:
Capacity forecasting requires the installation of a special license to display capacity forecasting
metrics. If the license is not installed, then the forecasting metrics will not be displayed.
17.What is the maximum capacity of a file system on a Dell Unity XT 380?
A. 32 TB
B. 64 TB
C. 256 TB
D. 128 TB
Answer: B
Explanation:
Training: Midrange Storage Performance Planning (ESSTGD05299) > Best Practices > System
Configuration Recommendations.
18.A Dell EMC Unity storage administrator needs to build a NAS server configuration to support
failover between SPs and NAS resources.
What is a term for this configuration?
A. Local Replication
B. IP Multi-tenancy
C. LACP
D. Separate IP Switches
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Answer: C
Explanation:
Reference: https://www.delltechnologies.com/en-ae/documentation/unity-family/unity-p-replication-
config/02- unity-rep-br-workflow.htm
19.What tabs are available on the Dell EMC PowerStore Manager Dashboard?
A. Health. Overview. Performance, and Capacity
B. Health, Efficiency. Performance, and Summary
C. Performance. Efficiency, and Capacity only
D. Performance. Overview, and Capacity only
Answer: A
Explanation:
These categories are divided in tabs: Overview, Capacity, and Performance.
Reference: https://volumes.blog/2020/05/07/what-is-powerstore-part-6-powerstore-user-interface/
20.Which are benefits of choosing the highest capacity flash drives when designing a Dell Unity XT
All-Flash system?
A. Enhances data security and system boot time
B. Lowers physical space power and cooling requirements
C. Decreases ware-leveling, performance and redundancy requirements
D. Reduces maintenance and rebuild time
Answer: B
Explanation:
Choosing the highest capacity flash drives when designing a Dell Unity XT All-Flash system can
provide several benefits, including lower physical space, power and cooling requirements.
Additionally, higher capacity drives can also improve system boot time, reduce maintenance and
rebuild time, and decrease wear-leveling, performance, and redundancy requirements.
21.What type of template in the PowerStore sizing tool do the following parameters represent?
- Random Read: 50%
- Random Write: 50%
- Read Size: 32 KiB
- Write Size: 32 KiB
A. Oracle OLTP
B. MS SQL
C. Exchange 2010
Answer: C
22.A company has a Dell Unity XT 880 at its Boston site providing file storage for a business
production application. The company has a second remote site 8 km (5 mi) away in Cambridge A
third site is in New York (342 km (213 mi) from the Boston site)
How can the same production data be protected against system outage with a zero RPO and a
maximum of 15 minutes RPO data recovery?
A. Synchronous replicate from Boston to Cambridge Asynchronous replicate from Boston to New
York
B. Synchronous replicate from Boston to Cambridge Synchronous replicate from Boston to New York
C. Asynchronous replicate from Boston to Cambridge Asynchronous replicate from Cambridge to
New York
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D. Synchronous replicate from Boston to Cambridge Synchronous replicate from Cambridge to New
York
Answer: B
Explanation:
Synchronous replication will provide a zero RPO as all data is written to both the primary and
secondary storage at the same time, which means any data written to the primary storage will be
instantly available on the secondary storage. This configuration will ensure that the data is protected
against system outage, and in case of any failure, the recovery time will be a maximum of 15 minutes
as the data is already replicated to the secondary site.
23.A customer configures their Live Volume setup for synchronous replication with the High
Availability option. They are designing a DR resiliency plan to ensure data integrity in the event of
data corruption.
Which Dell EMC SC Series technology should you use?
A. Live Volume with Non-Uniform Presentation
B. Live Volume with Uniform Presentation
C. Synchronous Replication with High Consistency
D. Live Volume with Managed Replication
Answer: D
Explanation:
Reference: https://downloads.dell.com/manuals/common/dell-emc-sc-series-sync-replication-live-
volume.pdf
(7)
24.A customer has two Dell S4148FON switches which are not connected to each other. The
customer wants to use SMB to present NAS data directly from the array to their users. The solution
must have resilience in case a switch outage occurs
Which solution should the technical architect recommend?
A. Dell PowerStore100X
B. Dell PowerVault ME4
C. Dell PowerStore 1000T
D. Dell Unity XT 480
Answer: D
Explanation:
The Dell PowerVault ME4 is a storage area network (SAN) solution specifically designed for SMB
environments. It provides high availability through active-active controllers and automatic failover,
which ensures that data remains accessible in the event of a switch outage. By connecting the two
S4148FON switches to the Dell PowerVault ME4, the customer will be able to present NAS data
directly from the array to their users, and also have resilience in case of switch outage.
25.Which Dell EMC SC Series array allows for back-end expansion cards?
A. SCv3000
B. SC7020
C. SC5020
D. SCv3020
Answer: B
Explanation:
https://www.dell.com/support/manuals/en-us/storage-sc7020/sc7020-om/sc7020-series-storage-
system-back-panel-view?guid=guid-ba3314b9-ddaf-4413-8a25-4bb66c2d421b&lang=en-us
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Here we clearly have Each storage controller contains:[...] Expansion slots for I/O cards: Slots for
optional front-end connectivity C Fibre Channel and iSCSI I/O cards Slots for optional back-end
connectivity C SAS I/O cards [...] SCv3000, SCv3000 and SC5020 owner manual say: One
expansion slot for a front-end I/O card:
https://www.delltechnologies.com/de-at/collaterals/unauth/technical-guides-support-
information/services/h17356-storage-config-sap-hana-tdi-sc-vg.pdf
26.From which storage platforms does a migration import data to a Dell PowerStore cluster?
A. Dell EqualLogic PS series Unity, Dell Compellent SC Series, and PowerVault ME
B. PowerMax. Dell EqualLogic PS senes Dell Compellent SC Series and Unity
C. VNXe Unity Dell Compellent SC Series and Dell EqualLogic PS series
D. Unity VNX2 Dell EqualLogic PS series and Dell Compellent SC Series
Answer: D
Explanation:
A migration import allows data to be transferred from an existing storage platform to a Dell
PowerStore cluster. The platforms that support migration import to a Dell PowerStore cluster include
Unity, VNX2, Dell EqualLogic PS series and Dell Compellent SC Series. These platforms are EMC
storage systems, which are now owned by Dell Technologies.
27.4.4 SAS SSD
Reference: https://www.delltechnologies.com/asset/en-us/products/storage/industry-
market/h18149-dell-emc-powerstore-platform-introduction.pdf
28.A customer is using Dell Unity XT 880 storage with 120 HDD Drives, with 10% of flash capacity
from flash drives in RAID 5. They have eight LUNs provisioned for bandwidth-oriented workload. The
workload is evenly split between two controllers, all available eight FC 32Gb/s ports. The customer is
not able to reach more than 10 GB/s of read throughput.
What is the cause of this issue?
A. HDD drives saturated
B. Read cache saturatedC. Frontend saturated
D. SAS bus saturated
Answer: D
29.What is the maximum number of data drives that can be put in to a Dell PowerStore 1000T base
enclosure?
A. 23
B. 21
C. 25
D. 24
Answer: B
Explanation:
The maximum number of data drives that can be put in to a Dell PowerStore 1000T base enclosure is
21. The Dell PowerStore 1000T has a 2U form factor, and it supports a maximum of 21 drives in the
base enclosure. The drives can be either SAS or NVMe, and it's important to keep in mind that the
maximum capacity of the system depends on the type of drives that are used. It's important to note
that the PowerStore 1000T supports up to 2 expansion shelves that can hold an additional 21 drives
each, for a maximum of 63 drives in total. Also, the PowerStore 1000T supports up to 4 NVRAM
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modules that are used to cache metadata and improve performance.
30.What is a consequence of using an 800 GB drive and five 400 GB drives in a Dell EMC Unity XT
dynamic pool?
A. Extents 9 C 14 are used to create a RAID Group
B. Unisphere short strokes the 800 GB drive to 8 extents
C. Extents 9 C 14 are marked unavailable until more 800 GB drives are added
D. Extents 9 C 14 are marked unavailable and can never be recovered
Answer: C
Explanation:
The entire capacity of a particular drive size is only available when the drive count within the drive
partnership group for the drive in question matches or exceeds the stripe width plus one drive. It is not
recommended to mix different size drives of the same type for this reason, unless an adequate
number of drives are available to meet or exceed the stripe width plus one drive requirement
h16289-dell_emc_unity-dynamic_pools.pdf - Page 18-19
31.You plan to schedule a Live Optics sampling with your customer to size a Dell EMC SC Series
array. However, the customer wants to postpone the run until the end of the quarter because there
could be more activity on the current storage system.
What course of action is recommended?
A. Wait until the end of the quarter and collect a week-long sampling
B. Take a single-day sampling on any given day because that is sufficient in most instances
C. Wait until the end of the quarter and collect a single-day sampling
D. Take a week-long sampling on any given week because that is sufficient in most instances
Answer: B
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