E20-538 - Network Attached Storage (NAS) Specialist Exam
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Which backup methodology is responsible for the transfer of both data and metadata to the backup server through the IP network?
You are implementing an NFS solution for five clients. Four clients can read and write to the export but only one can read. What action should be taken so that the read-only client can read and write to the export?
Add it to the "Root Host" or "read/write Host" security option
What component of an NDMP backup deployment provides access to the file systems to be backed up?
The storage administrator would like to know if more AV servers are necessary for optimal performance and protection. Which tool can the system administrator use to analyze current utilization of the antivirus environment?
CAVA Sizing Tool
Which Celerra feature allows the separation of CIFS servers and their associated environment into containers?
Under what condition should you start and stop the CIFS service?
You modified an interface on the default CIFS server and you modified an interface on the Data Mover.
Three different IP interfaces have been defined for a single port on a Data Mover. What can be done to accommodate these interfaces on three separate subnets?
Assign different 802.1Q VLAN IDs to each interface.
Which iSCSI objects require secret passwords for two-way CHAP authentication?
Agent and protocol server
How can you disable Automatic SavVol Extension?
By setting HWM to 0
You have two separate networks, one for the production network and a private network for iSCSI and NFS. You try to join a CIFS server to the domain but get an error message "no domain controllers found." You can ping all DCs from the Data Mover. What most likely is the problem?
A default route for the Data Mover has not been set.
A new DNS server has been added to the current domain. How do you add the new server to the Data Mover in Unisphere?
On the DNS tab of the Network Settings, add the new server's IP address to the current DNS domain.
What is TCP Window Size?
Amount of data to be sent across the network before an acknowledgement is required
What is the default result of joining a CIFS server to a Windows Active Directory domain?
The "EMC Celerra" container is created in Active Directory.
To enable each Data Mover to utilize CAVA, where would the settings and options be defined?
viruschecker.conf on the physical Data Mover
Which backup solution allows for data transfer from one NAS device to a tape attached to another NAS device?
You have moved a VDM from one Data Mover to another. Now the users cannot access the data. What could cause this condition?
Interface names are different to the source VDM.
A Celerra administrator needs to prevent users from viewing .etc and lost+found of exported file systems. What administrative steps would meet the needs?
Mount the file system at the root level, create a subdirectory, and export from that subdirectory.
Which feature on a Celerra unified storage system allows the back-end CLARiiON SPs to be available on the public network?
You are setting up a Celerra unified FC model. Which UltraFlex I/O modules can be used for host connectivity?
1/2/4 Gb/s module, 2/4/8 Gb/s module, iSCSI I/O modules
What type of authentication does Celerra support for iSCSI connections?
What is the default size limitation for a SavVol?
20% of the total disk space available
Which command can be used to start the virus checker on the Data Mover?
server_setup <movername> -Protocol viruschk option start
A storage administrator is considering implementing an iSCSI solution. What is one reason to justify the decision?
A native iSCSI solution will use existing SAN Fibre Channel switches
Management asks you to set quota limits on a directory tree. They want the default set to 500 MB with a possible overhead of 20%. They want to enforce these limits on the sum of the logical size of objects in that quota tree. What is part of the correct answer?
Set the hard limit to 600 MB, and set the file size quota policy on the Data Mover.
A site administrator would like to have file system quota implemented. However, the administrator is worried about users who create symbolic links. How can symbolic links be excluded from the file system quota?
Use the filesize policy
For a "One-to-Many" replication, how are the replication sessions configured?
All sessions are independent and configured individually. 17
A Celerra file system has a SnapSure schedule enabled for daily checkpoints. By using the Microsoft Shadow Copy Client, a user can see previous versions of a certain file up to a certain date in the past, but nothing else after that. What could be the cause of this issue?
The SavVol has reached a full state.
You enter the following command: 3 nas_fs -create size=3M pool=clar_r5_economy What will be the result?
The file system is created with a default file system name.
In a "One-to-Many" configuration, a source file system is to be replicated simultaneously to three different destinations. How many checkpoints are created on the source side?
A user needs to test new software with existing data stored on a Celerra file system that has checkpoints. The Celerra administrator is asked to mount a SnapSure checkpoint from the file system to a different Data Mover. Can the administrator fulfill this request? Why or why not?
No, because the checkpoint relies on the PFS
You are running out of capacity on your Celerra, and additional storage is already on order. Meanwhile, which quota configuration would track user consumption?
User quotas on the file system
What is the number of standby Data Movers required to achieve high availability in a Celerra model using eight Data Movers?
The cge0 device of server_2 has two associated interfaces called cge0prd and cge0bkp, each one in different VLANs. The NAS administrator could not create a new FSN device using cge0 and cge1. What would be the reason?
You cannot use a device that is currently in use to support another interface.
You have multiple CIFS servers on a single Data Mover. What type of object would you create that can be accessed from all servers?
You are implementing a Celerra CIFS solution in a mixed NFS and CIFS user environment. Local passwd and group files are placed on the Data Movers, which are also configured for LDAP. Which search order is used for user mapping?
Secmap, then local passwd and group files
You are implementing a Celerra gateway system into an existing CLARiiON back end with 11 available EFDs. What are the possible disk configurations/Celerra storage pools that can be made using these disks?
clarefd_r5 pool with two (4+1) disk groups and a hot spare
The EMC_OFFLINE_DATA environment variable was set to yes on backup software for the NDMP backup of a Celerra CIFS server dataset. What will be the backup behavior?
Migrated files will be backed up.
What is a minimum requirement when creating a file system using Manual Volume Management?
A checkpoint is created. The first block DB01 will be updated for a second time. What will happen after the update?
Bitmap value remains unchanged; PFS is updated.
Which Celerra feature stores Windows SIDs correlated to UIDs and GIDs?
Which NAS backup methodology allows the transfer of metadata to the backup server through IP and data access from the Data Mover's back-end storage array through the SAN?
Between which layers of the OSI model would you find the iSCSI target?
4 and 6
You are implementing a Celerra CIFS solution. When discussing the mapping method choices, the site administrator asks you to explain the significance of the user mapping method for CIFS users. How do you respond to the site administrator?
Celerra has a UxFS-based file system that requires UNIX style UIDs and GIDs for file and directory permissions. Windows users and groups are identified with SIDs. The mapping method correlates UNIX UIDs and GIDs to Windows SIDs for uniquely identifying users.
An administrator configured Data Mover network devices to transmit frames on all links for redundancy. Which network configuration was used to accomplish this?
A CIFS user has previously accessed a Data Mover with a secondary Usermapper service, and performs a subsequent access to the same Data Mover. Which describes the mapping operation for this user?
The secmap cache on the Data Mover being accessed provides the user mapping.
What is the default TCP port for an iSCSI network portal?
You are asked by management to create a project directory and track the individual user consumption in this directory using Celerra quota features. No limits should be enforced. What would be part of an appropriate procedure to satisfy this requirement?
Set up a tree quota on the new directory; leave the two fields specifying the limits for the quota tree and the user quota blank in the Unisphere GUI
One of the Celerras in the data center dropped all client access suddenly. Upon further investigation, you discover that the primary blade is in a panicked state but did not fail over to the standby blade. What is one possible cause for this?
The Control Station was powered off.
What is the maximum depth for a cascaded replication?
What address ranges do the two Celerra internal networks use?
18.104.22.168 network with netmask 255.255.255.0 and 22.214.171.124 network with netmask 255.255.255.0