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Exam : EMC E20-850
Title : CLARiiON Implementation Engineer Expert


1. LUN 300 is a Clone of LUN 100, a 512 GB LUN. Both LUNs are on 4+1 RAID 5 RAID Groups, and were bound with default values.
The Clone is currently synchronizing at the medium synchronization rate. LUN 100 is performing random 4 kB writes at a rate of 60 IOPs.
Which I/O sizes will be seen on the clone in the Navisphere Analyzer > I/O Size Distribution Summary view?
A. 128 kB and 256 kB
B. 4 kB and 128 kB
C. 4 kB and 64 kB
D. 64 kB and 128 kB
Answer: B

2. What is the tool for setting registry values for an Emulex driver in a Windows 2K3 server environment?
A. lputilnt
B. regedit
C. regedit32
D. regedt
Answer: A

3. Which software in addition to Navisphere Management Server must be installed on a laptop to allow viewing of Analyzer .nar files when there is no network connectivity?
A. Navisphere Analyzer Provider
B. Navisphere Host Agent
C. Navisphere Manager
D. Navisphere Off-Array UIs
Answer: D

4. A customer needs to collect performance data from a CX3-80 for trend analysis. The array was recently upgraded from FLARE 22 to FLARE 24. The new file has a .naz extension, while the files prior to the upgrade have .nar extensions. The customer uses the updated management workstation to view the performance data offline but is unable to open the new files.
Why?
A. There is an incorrect version of the Off-Array Manager.
B. Log file is encrypted
C. Navisphere Analyzer Enabler is not installed.
D. Statistics logging has not been started
Answer: B

5. MMC uses MirrorView/S between two data centers. The company currently uses the write intent log (WIL) feature on both arrays. The production workload was transferred to the remote data center after a disaster. When MMC failed back to the production data center, the company experienced full resynchronizations of all its MirrorView/S LUNs.
Why did this situation occur?
A. WIL from the primary site is irrelevant after the MirrorView/S secondary images have been promoted.
B. WIL is stored on the SP cache and it was lost during the outage.
C. WIL was lost on the production data center during the outage and a full re-synchronization of all the LUNs was required.
D. WIL was never transferred after the outage.
Answer: A

6. SES Analysis Inc. has two CX500s separated by a distance of 8 km. The company wants to implement several asynchronous mirrors. The admin created three asynchronous mirrors, and received an error message when trying to create the fourth.
The array has 31 LUNs using SnapView snapshots, and the total number of snapshots is 47. SES is also using Incremental SAN Copy on 16 other source LUNs. Each Incremental SAN Copy session has two destinations. Another 16 source LUNs have two clones each.
Why is SES seeing the error messages?
A. Number of Incremental SAN Copy images exceeds the maximum allowed on a CX500
B. Number of mirror and clone images exceeds the number allowed on a CX500
C. Number of snapshots exceeds the maximum allowed on a CX500
D. Required number of LUNs in the Reserved LUN Pool exceeds the allowed maximum on a CX500
Answer: D

7. Company XYZ has MirrorView/A deployed with consistency groups. A system administrator expands a LUN in the consistency group to a metaLUN.
Using the least amount of administrative effort, what actions need to be taken to continue the consistency group relationship?
A. Destroy consistency group, re-create consistency group
B. Destroy mirror, re-create mirror
C. Leave consistency group alone
D. Remove mirror from consistency group, destroy mirror, re-create mirror, add mirror to consistency group
Answer: D

8. HHH Corp. is in the process of an Incremental SAN Copy migration between CLARiiON arrays. During the migration, the source LUN fails and causes the reserved snapshot session to stop.
After the source LUN is fixed, what must be done to start the session?
A. Modify the session to a full session and back to an incremental
B. No user action; session will start automatically
C. Session must be destroyed and re-created
D. Start the session manually
Answer: A

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