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Code d'Examen: E20-822
Nom d'Examen: EMC (CLARiiON Solutions Expert Exam for Storage Administrators)
Questions et réponses: 120 Q&As
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NO.1 A large financial customer has a time-critical OLTP application running on a dedicated CX3-80. One of
their internal administrators believes they modified something that could have affected the production
LUN. Since then the response time has increased significantly.
What action is the likely cause of the problem?
A.Decreased the high watermark to 75%
B.Enabled auto-assignment
C.Increased queue depth to 128
D.Increased the cache write aside value to 3076
Answer: C
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NO.2 A customer is currently using Replication Manager to create clone copies of their SQL Server instance
which are then mounted to a backup server and streamed to tape. The customer has decided to purchase
a second CLARiiON and implement a DR scenario. The DR site is located 30 km away. A dedicated T1
(1.5 Mb) line is leased specifically for DR purposes with measured latencies that average 5-10 ms.
The application is considered mission-critical and as such very little data loss is acceptable. Any solution
implemented must have very little impact on performance. Time will be allowed for the application to be
recovered in the case of a disaster. The implemented solution must also allow for transaction logs to be
replayed in the case of data corruption.
Which DR solution would best fit this scenario?
A.MirrorView/A
B.RepliStor SQL Server Module
C.SQL Log Shipping/Full SAN Copy from the production LUN
D.SQL Log Shipping/Incremental SAN Copy from the production LUN
Answer: C
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NO.3 A customer created two RAID groups, 0 and 2, with the default settings on their CX3-80 and bound
four LUNs in each group. After starting the application the customer notices all I/O is going through SP B.
What caused the LUN imbalance?
A.CX3-80 has a single SP
B.Default setting bound all LUNs on the same SP
C.Host does not have failover software installed
D.Host is not ALUA-aware
Answer: B
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NO.4 A customer has a single RAID group with a RAID 1/0 6+6 LUN on a dedicated DAE2. This LUN is
active on SP A. They need to expand with the maximum possible increase in IOPS. The LUN may not go
offline. The customer has a new DAE2 with the same disks.
How should they proceed?
A.Add 12 disks to the current RAID group. Create a new LUN. Create a striped metaLUN.
B.Back up the current LUN. Create a new RAID group and a new LUN on SP B. Present it to the host and
create a LVM plaid. Restore the data.
C.Create a new RAID group and create a new LUN on SP A. Create a concatenated metaLUN.
D.Create a new RAID group and create a new LUN on SP A. Create a striped metaLUN.
Answer: D
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NO.5 Click the Exhibit button.
A storage administrator is automating a solution using the Navisphere Secure CLI. In the event of
production data corruption, the script needs to recover from the target LUNs.
Which steps should the script perform?
P = Primary
S = Secondary
Snap = Snapshot
A.Unmount P, fracture, roll back Snap, synchronize, promote P, and mount P
B.Unmount P, promote S, fracture, roll back Snap, synchronize, promote P, and mount P
C.Unmount P, roll back Snap, promote S, fracture, synchronize, promote P, and mount P
D.Unmount P, roll back Snap, restore S, and mount P
Answer: B
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NO.6 Click the Exhibit button.
While performing a routine check of a CX3-40 with FLARE R26 the storage administrator receives an
error while trying to clear the logs. What is the cause of the error?
A.Host agent is not running
B.The Privileged User List is empty
C.The user is logged in as a security administrator role
D.The user is logged in with a manager role
Answer: D
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NO.7 A new CLARiiON arrives at a customer's site and an EMC Customer Engineer performs the physical
installation. The storage administrator is under a lot of pressure to have the array online and in production
by the end of the week. The storage administrator selects several Windows and Solaris servers for the
initial production rollout. The storage requirements have been agreed upon and the storage administrator
creates 30 LUNs of various sizes based upon EMC best practices.
The administrator works with the server team to install HBAs, update settings, install EMC software, and
then perform the necessary cabling and zoning requirements. After the hosts successfully register with
the CLARiiON array, the Windows and Solaris administrators state each server has 30 LUNs allocated.
What does the storage administrator need to accomplish to ensure each server has access to the
appropriate LUNs?
A.Create the appropriate storage groups
B.Disable Access Logix
C.Enable Access Logix
D.Fix the incorrect zones
Answer: C
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NO.8 A customer has been tasked with copying 50 LUNs between two CLARiiONs using SAN Copy. The
customer starts the sessions selecting all defaults. The resulting copies appear to be taking an
unexpectedly long time.
Which settings should be increased to improve performance?
A.Reserved LUN Pool Size, Concurrent sessions
B.Throttle Value, Concurrent sessions
C.Throttle Value, Reserved LUN Pool Size
D.Write cache, Reserved LUN Pool
Answer: B
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NO.9 A customer uses Incremental SAN Copy (ISC) as part of a DR solution. They have configured the
Reserved LUN Pool (RLP). They are adapting their environment to support different failure scenarios.
Which combination of failures is most serious?
A.A failure of the ISC update followed by a failure of the production LUN
B.A failure of the ISC update followed by a failure of the remote LUN
C.A failure of the link followed by a failure of the remote RLP
D.A failure of the RLP on the remote CLARiiON followed by a failure of the remote LUN
Answer: A
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NO.10 Click the Exhibit button.
While performing a routine check of a CX3-40 with FLARE R26 the storage administrator receives an
error while trying to clear the logs. What is the cause of the error?
A.Host agent is not running
B.The Privileged User List is empty
C.The user is logged in as a security administrator role
D.The user is logged in with a manager role
Answer: D
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NO.11 Click the Exhibit button.
What is true of LUN 3?
A.Disk crossings are excessively high
B.Disk utilization is above the best practices threshold
C.The host data is misaligned
D.The number of stripe crossings indicates a large I/O size
Answer: C
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NO.12 A customer created two RAID groups, 0 and 2, with the default settings on their CX3-80 and bound
four LUNs in each group. After starting the application the customer notices all I/O is going through SP B.
What caused the LUN imbalance?
A.CX3-80 has a single SP
B.Default setting bound all LUNs on the same SP
C.Host does not have failover software installed
D.Host is not ALUA-aware
Answer: B
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NO.13 Click the Exhibit button.
A customer uses multiple server preparation scripts; one for new Exchange servers and one for recovery.
These scripts are used to configure the CLARiiON storage using the Navisphere Secure CLI. The
customer calls and reports that they accidentally ran the new server preparation script instead of the
recovery script they intended to run.
The customer asks for a check to see if their data is still available from CLARiiON storage as they cannot
find their LUNs. The CLARiiON SP event logs show the data in the exhibit. Which method can the
customer use to correct the problem?
A.Rebind base and component LUNs, reform the metaLUN, place the metaLUN in SG for the host, and
recover the data from the backup.
B.Reform the metaLUN from the original base and component LUNs, place the metaLUN in SG for the
host, and recover the data from the backup.
C.Use CLARiiON recovery tools to recover the metaLUN, place the metaLUN in SG for the host, and
recover the data from the backup.
D.Use Navisphere Secure CLI tools to recover base and component LUNs, reform the metaLUN, and
place the metaLUN in SG for the host.
Answer: A
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NO.14 Click the Exhibit button.
A failure has occurred in a DR environment. The error message is displayed in the exhibit. What must be
done to correct the failure?
A.Add more LUNs to the remote CLARiiON RLP. Restart the synchronization.
B.Destroy the mirror. Add a secondary of the correct size.
C.Enable write cache on the remote CLARiiON Write Intent Logs. Restart the synchronization.
D.Increase the write cache size on the remote CLARiiON.
Answer: A
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NO.15 A company has implemented Replication Manager to back up their SQL Server. In addition to clone
copies every 6 hours, they have also implemented SQL Server log backups for a more granular RPO.
Last night, a junior DBA corrupted the production database. After using Replication Manager to restore
the database with no recovery, the senior DBA attempts to replay the transaction log backups but the
database returns an error indicating that no database is in a state to replay logs.
What is the cause of this restore failure?
A.Replication Manager only supports transaction log replay on databases restored with full recovery
B.rmsqlrestore.exe was not used to replay the VDI metadata
C.The restored database's SCN is out of sync with the SQL system databases
D.The transaction log backups have a gap in the sequence of transactions
Answer: B
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NO.16 Click the Exhibit button.
While performing a routine check of a CX3-40 with FLARE R26 the storage administrator receives an
error while trying to clear the logs. What is the cause of the error?
A.Host agent is not running
B.The Privileged User List is empty
C.The user is logged in as a security administrator role
D.The user is logged in with a manager role
Answer: D
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NO.17 Click the Exhibit button.
You are the SAN Administrator at a company. The company is running multiple Exchange Server 2007
storage groups on a CLARiiON array that exclusively uses 15k rpm 146 GB drives. You have been tasked
with adding a third Exchange storage group with one mailbox store to the existing server.
The storage for this new Exchange storage group must be allocated from the same CLARiiON currently
running the other two Exchange storage groups. All Exchange storage groups are presently exhibiting a
1:1 read/write ratio. The new storage group will require capacity identical to the existing Exchange
storage groups.
The table below, as well as the exhibit, indicates the current utilization of the array.w`V6a2tYJ%&,*In
order to satisfy the capacity requirements (GB and IOPS), in which RAID group must you create a
database LUN for the new Exchange storage group?
A.0
B.10
C.20
D.30b
Answer: C
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NO.18 A customer has recently upgraded their CLARiiON to FLARE R26. What software and configuration
changes must the storage administrator ensure are in place to take advantage of the Asymmetric
Active/Active features of the software?
A.PowerPath 5.0; and change all initiators to use Failover mode 2
B.PowerPath 5.0; disable ArrayCommPath, and change all initiators to use Failover mode 4
C.PowerPath 5.1; and change all initiators to use Failover mode 4
D.PowerPath 5.1; disable Array CommPath, and change all host initiators to use Failover mode 3
Answer: C
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NO.19 A large warehousing company has two CLARiiONs with two LUNs set up and each is mirrored with
MirrorView/A over DWDM. The two sites are less than 1 km away.
The company is currently running an OLTP database on a 300 GB RAID 1/0 4+4 LUN and its logging on a
150 GB RAID 1/0 4+4 LUN. The I/O read/write ratio is 2:1 with a 2 kB average I/O size.
The customer notices that at peak times the latency becomes an issue as their users start to complain
about poor performance. What is your recommendation?
A.Check the fibre for faults
B.Upgrade the CLARiiON model
C.Use Incremental SAN Copy
D.Use MirrorView/S
Answer: D
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NO.20 Click the Exhibit button.
A customer wants to create an additional 250 GB LUN on their existing RAID 6 group. How can this be
accomplished?
A.Create the LUN on another RAID 6 group using concatenation
B.Defragment the RAID group and bind the additional LUN
C.Destroy the RAID group and create the new LUNs
D.Expand the RAID group to increase the available space
Answer: A
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NO.21 A customer is reporting a problem with a physical disk. Examining the SP Event Log shows errors for
LUN 16. Data is being gathered from a UNIX host used for storage management. The host does not have
the capability to run the Navisphere Web UI.
To determine the underlying disk structure, which Navisphere Secure CLI subcommand can be used to
determine if LUN 16 is being affected?
A.getdisk
B.getinfo
C.getlun
D.getrg
Answer: C
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NO.22 A customer was running a snapshot session when they noticed a SP failure. The Source LUN was
owned by the failed SP. What will happen to the session and the Reserved LUN Pool (RLP) LUN?
A.Session continues and the RLP LUNs trespass. After repairing the failed SP, the RLP LUN must be
manually trespassed to the original owning SP.
B.Session continues and the RLP LUNs trespass. After repairing the failed SP, the RLP LUN trespasses
back to the original owning SP.
C.Session gets deactivated and the SP frees the allocated LUN. After fixing the failed SP, the session will
activate and the original RLP LUN will be allocated.
D.Session stops and a new RLP LUN will be allocated on the surviving SP upon fixing the failed SP. The
RLP LUN will trespass back to the original SP and the user must manually restart the session.
Answer: B
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NO.23 A customer is implementing the Replication Manager/SAN Copy/RepliStor solution for DR of their
Exchange environment. In the process of configuring this solution they need to configure the RM DR
utility to run after the completion of the SAN Copy job.
Which level of IR callout should they use in order for the script to invoke at the proper time?
A.100
B.300
C.400
D.600
Answer: D
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NO.24 A customer has configured SnapView for two LUNs on a DR CLARiiON storage system. When the
client attempts to run the Navisphere Secure CLI command to create the snapshot session, it fails.
In the setup process for using SnapView, which step did the customer forget to do?
A.Allocate LUNs to the Reserved LUN Pool
B.Allocate Write Intent Log
C.Enable Incremental Synchronization
D.Test IP link latency
Answer: A
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NO.25 Click the Exhibit button.
Based on the exhibit, what happened between 05:21 A.M. and 06:56 A.M.?
A.CLARiiON back-end port was disconnected
B.CLARiiON front-end port was disconnected
C.MirrorView connection failed
D.SAN Copy connection failed
Answer: C
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NO.26 Click the Exhibit button.
While performing a routine check of a CX3-40 with FLARE R26 the storage administrator receives an
error while trying to clear the logs. What is the cause of the error?
A.Host agent is not running
B.The Privileged User List is empty
C.The user is logged in as a security administrator role
D.The user is logged in with a manager role
Answer: D
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NO.27 A new CLARiiON arrives at a customer's site and an EMC Customer Engineer performs the physical
installation. The storage administrator is under a lot of pressure to have the array online and in production
by the end of the week. The storage administrator selects several Windows and Solaris servers for the
initial production rollout. The storage requirements have been agreed upon and the storage administrator
creates 30 LUNs of various sizes based upon EMC best practices.
The administrator works with the server team to install HBAs, update settings, install EMC software, and
then perform the necessary cabling and zoning requirements. After the hosts successfully register with
the CLARiiON array, the Windows and Solaris administrators state each server has 30 LUNs allocated.
What does the storage administrator need to accomplish to ensure each server has access to the
appropriate LUNs?
A.Create the appropriate storage groups
B.Disable Access Logix
C.Enable Access Logix
D.Fix the incorrect zones
Answer: C
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NO.28 Click the Exhibit button.
A customer wants to create an additional 250 GB LUN on their existing RAID 6 group. How can this be
accomplished?
A.Create the LUN on another RAID 6 group using concatenation
B.Defragment the RAID group and bind the additional LUN
C.Destroy the RAID group and create the new LUNs
D.Expand the RAID group to increase the available space
Answer: A
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NO.29 You are using Replication Manager to make clones of two production Exchange mailbox database
LUNs. After reviewing the event log for the week, you notice there have been numerous failures but no
alerts have been sent out. Replication Manager was configured to send email alerts in case of an
Exchange job failure.
What is preventing the email alerts from being sent out?
A.MAPI32.DLL is missing on the Replication Manager server
B.Outlook was not installed on the Replication Manager server
C.The Replication Manager console was not configured to relay alerts
D.The SMTP service in IIS was not configured on the Replication Manager server
Answer: D
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NO.30 A company has requested an independent consultant to develop and implement a security model for
the CLARiiON storage platform. The company has limited access to the administrator role by removing
rights for all accounts. However, they would like to keep the single administrator role account for top level
management.
Management of user security should not be done by the administrator role user. In addition, the storage
object administrators should not be able to change user security when using the Secure CLI. CLARiiON
storage systems are located in a protected data center with limited physical access.
Which method should be employed to manage user security?
A.Create a Security Administrator role user and create a Manager role user account for storage object
managers.
B.Create a Security Administrator role user, enable the CLI filter, and create a Manager role user account
for storage object managers.
C.Implement security using PKI certificates, create a Security Administrator role user, and enable the CLI
filter.
D.Implement security using PKI certificates, enable the CLI filter, and create a Manager role user account
for storage object managers.
Answer: B
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