In an asynchronous replication, what is the maximum number of replicated NAS servers supported
for the Dell Unity XT 380 series?
C
Explanation:
The maximum number of replicated NAS servers supported for the Dell Unity XT 380 series in an
asynchronous replication is 126. This is the same as the maximum number of NAS servers supported
for the Dell Unity XT 380 series in general. Asynchronous replication is a method of replicating data
between two Dell Unity systems with a configurable recovery point objective (RPO). It allows the
source system to continue normal operations without waiting for the destination system to
acknowledge the completion of the replication.
Reference: [Dell EMC Unity: Replication Technologies], [Dell EMC Unity: NAS Capabilities]
What is a benefit of using vVols?
C
Explanation:
A benefit of using vVols is that individual VMs on a datastore can be snapped. vVols are virtual
volumes that are stored on a storage array and managed by vSphere. They enable granular control
and management of VM storage. With vVols, each VM has its own set of virtual disks that are
mapped to corresponding storage objects on the array. This allows the array to perform snapshot
operations on individual VMs without affecting other VMs on the same datastore.
Reference: [Dell EMC Unity: VMware vSphere Virtual Volumes (vVols) Implementation]
On a Dell Unity XT file system asynchronous replication session, how many system Snapshots are
required to support replication?
A
Explanation:
On a Dell Unity XT file system asynchronous replication session, four system Snapshots are required
to support replication. Two system Snapshots are created on the source file system, and two system
Snapshots are created on the destination file system. The source system Snapshots are used to track
the changes that need to be replicated, and the destination system Snapshots are used to apply the
changes and maintain a consistent point-in-time copy of the source data. The system Snapshots are
automatically created and managed by the replication engine and are not visible to the user.
Reference: [Dell EMC Unity: Replication Technologies], [Dell EMC Unity: File System Configuration]
Which is the preferred FC Port for synchronous replication for a Dell Unity XT 380 system?
B
Explanation:
The preferred FC Port for synchronous replication for a Dell Unity XT 380 system is Fibre Channel Port
4 of SPA and SPB. This port is dedicated for synchronous replication traffic and has the highest
priority and bandwidth allocation. Synchronous replication is a method of replicating data between
two Dell Unity systems with zero recovery point objective (RPO). It requires a low-latency and high-
bandwidth network connection between the source and destination systems.
Reference: [Dell EMC Unity: Replication Technologies], [Dell EMC Unity: Hardware Information
Guide]
What three VMware datastore types can be defined by using UI or CLI interfaces from the Dell Unity
XT platform? (Choose three.)
A, B, C
Explanation:
VMware datastore is a logical container that holds virtual machine files and other data. There are
three types of VMware datastore that can be defined by using UI or CLI interfaces from the Dell Unity
XT platform:
vVol (Block): A vVol datastore is a block-based storage object that is formatted with the VMware
Virtual Volumes (vVol) framework and used to store virtual machine files and metadata. A vVol
datastore can be created by using the Unisphere UI or the UEMCLI interface on the Dell Unity XT
system. A vVol datastore can provide granular control, policy-based management, and improved
performance for virtual machines.
NFS (File): An NFS datastore is a file-based storage object that is formatted with the Network File
System (NFS) protocol and used to store virtual machine files and other data. An NFS datastore can
be created by using the Unisphere UI or the UEMCLI interface on the Dell Unity XT system. An NFS
datastore can provide scalability, flexibility, and efficiency for virtual machines.
VMFS (Block): A VMFS datastore is a block-based storage object that is formatted with the VMware
File System (VMFS) and used to store virtual machine files and other data. A VMFS datastore can be
created by using the Unisphere UI or the UEMCLI interface on the Dell Unity XT system. A VMFS
datastore can provide high performance, reliability, and compatibility for virtual machines.
Reference:
Dell EMC Unity: VMware ESXi Hosts and Clusters
Dell EMC Unity: Unisphere Overview
Dell EMC Unity: Unisphere CLI User Guide
What are two prerequisites when creating host configuration for NFS client? (Choose two.)
B, D
Explanation:
Host configuration is the process of defining the host properties and access permissions for a host
that connects to the Dell Unity XT system. For NFS clients, the host configuration requires two
prerequisites:
Network Address: The network address is the IP address or the subnet mask of the NFS client that
identifies the host on the network. The network address is used to register the host on the Dell Unity
XT system and to grant access to the NFS filesystems.
Hostname: The hostname is the name of the NFS client that is resolved by the DNS server or the local
hosts file. The hostname is used to display the host information on the Unisphere UI and to enable
host monitoring and alerting.
Reference:
Dell EMC Unity: Host Configuration
Dell EMC Unity: File System Configuration and Management
A storage administrator has a Dell Unity XT 480 system with one pool of flash drives, 192 GB of RAM,
and 1.2 TB of FAST Cache.
What is the total cache availability for caching the flash drives?
C
Explanation:
The total cache availability for caching the flash drives on a Dell Unity XT 480 system with one pool of
flash drives, 192 GB of RAM, and 1.2 TB of FAST Cache is 3.58 TB. This is calculated by adding the
system memory (RAM), the FAST Cache, and the pool cache. The system memory is 192 GB, which is
equivalent to 0.18 TB. The FAST Cache is 1.2 TB, which is a dedicated cache for the flash drives. The
pool cache is 2.2 TB, which is a portion of the flash drives that is reserved for caching the pool data.
Therefore, the total cache availability is 0.18 + 1.2 + 2.2 = 3.58 TB.
Reference: [Dell EMC Unity: Performance Metrics], [Dell EMC Unity: FAST Cache Overview]
Which feature can be configured for a Dell Unity XT file system NFS share?
C
Explanation:
A feature that can be configured for a Dell Unity XT file system NFS share is the Host Access Level.
This feature allows the user to specify the access permissions for each host or host group that is
allowed to access the NFS share. The access permissions can be set to Read/Write, Read Only, or No
Access. The Host Access Level feature can be used to control the security and performance of the NFS
share. Access-Based Enumeration, Protocol Encryption, and Distributed File System are features that
can be configured for a Dell Unity XT file system SMB share, not NFS share.
Reference: [Dell EMC Unity: File System Configuration], [Dell EMC Unity: SMB Share Configuration]
Which are two features of the Dell UnityVSA? (Choose two.)
B, C
Explanation:
The Dell UnityVSA is a software-defined storage solution that runs the Dell Unity operating
environment on a VMware ESXi server. The Dell UnityVSA provides the same features and functions
as the Dell Unity hardware platform, such as block and file storage, snapshots, thin clones, data
reduction, replication, and encryption. Some of the features of the Dell UnityVSA are:
iSCSI Connectivity: The Dell UnityVSA supports iSCSI connectivity for block storage access. The iSCSI
protocol enables hosts to communicate with the Dell UnityVSA over an IP network and access LUNs
as SCSI devices. The Dell UnityVSA can support up to 64 iSCSI interfaces and up to 256 iSCSI sessions
per interface.
Asynchronous Replication: The Dell UnityVSA supports asynchronous replication for block and file
storage. Asynchronous replication is a feature that copies data from a source storage resource to a
destination storage resource over a network at scheduled intervals. Asynchronous replication can be
used for disaster recovery, data migration, or backup purposes. The Dell UnityVSA can support up to
256 replication sessions per system.
Reference:
Dell EMC Unity: Introduction to the Platform
Dell EMC Unity: Deploying VMware vSphere with Dell EMC UnityVSA
Dell EMC Unity: Configuring Hosts to Access Block Storage
Dell EMC Unity: Replication Technologies
Which firewall ports are required to be open for a successful outbound connection when configuring
integrated secure connect gateway?
C
Explanation:
The firewall ports that are required to be open for a successful outbound connection when
configuring integrated secure connect gateway are 443 and 8443. Integrated secure connect gateway
is a feature that enables secure remote access to the Dell Unity system through the Unisphere
Central web portal. It requires an outbound connection from the Dell Unity system to the Unisphere
Central server over the internet. Port 443 is used for HTTPS communication and port 8443 is used for
WebSocket communication.
Reference: [Dell EMC Unity: Unisphere Overview], [Dell EMC Unity: Integrated Secure Connect
Gateway]