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Slide 1: E20-820 CLARiiON Solutions Expert Exam for Technology Architects Exam: E20-820 Demo Edition C CERT MAGIC 1 http://www.certmagic.com
Slide 2: E20-820 QUESTION: 1 CE Casinos, Inc. has an application that gathers statistics from slot machines and saves the data to a CLARiiON LUN. Because I/O sizes are small, typically 8 KB or smaller, and the access pattern is very random, RAID-1/0 was chosen for the LUN, which is 512 GB in size. I/Os are consistent at 100 writes/s for 24 hours a day. This LUN must be replicated to a CX400 at a test site 10 km away for read-only data analysis. Data collection occurs between 8 am and 8 pm, and the analysis runs from midnight until 4 am. The link between sites is a dedicated 90 Mbps connection. What is the best solution for the customer's needs? A. Take a SnapView Snapshot of the Production LUN at 8 pm each night, and use SAN Copy to perform a full copy to the remote site. Stop the Session once analysis is complete. B. Clone the Production LUN. Fracture the Clone at 8 pm each night, and use SAN Copy to perform a full copy to the remote site. Resynchronize the Clone once analysis is complete. C. Mirror the Production LUN. Fracture the Mirror at 8 pm each night, and use a SnapView Snapshot of the secondary image for analysis. Resynchronize the Mirror once analysis starts. D. Clone the Production LUN. Fracture the Clone at 8 pm each night, and use Incremental SAN Copy to perform a copy to the remote site. Resynchronize the Clone once analysis is complete. E. Use Incremental SAN Copy to a remote LUN with the Production LUN as the source, and run the update at 8 pm each night. Use a Snapshot of the remote LUN for the analysis. Stop the SnapView Session once the analysis completes. Answer: C QUESTION: 2 BGH, Ltd, located close to Heathrow Airport in London is considering implementing a Disaster Recovery solution. The business requires the utmost data availability and can afford only minimal downtime should a disaster occur. The solution's RTO should be considered in seconds to minutes and the RPO should be zero to minimal data loss. BGH currently uses a CLARiiON CX500 at the airport site and plans to install a DWDM link to its remote office 25 kilometers away. BGH also intends to utilize Legato AAM (Automated Availability Manager) to ensure speedy resumption of processing at the remote site. Which replication product would you recommend if BGH purchases a CX500 for the remote site? A. B. C. D. SAN Copy MirrorView MirrorView A Incremental SAN Copy 2 http://www.certmagic.com
Slide 3: E20-820 Answer: B QUESTION: 3 When implementing SAN Copy Incremental over long-distances and the link latency is unknown, which setting will measure latency by sending test I/O to the destination? A. B. C. D. Set Latency to Auto Set Latency to Test Set Link Bandwidth Auto Set Latency to the lowest setting Answer: A QUESTION: 4 CTM, Ltd wants to use SAN Copy over IP with a McData 3300 FC/IP bridge. After completing the design, you notice that the CTM will have bandwidth problems due to the amount of data transferred in push mode over 10 Mb/s lines. The SAN Copy I/O size will be 512KB and the cable load time is 0.425 second. CTM cannot increase its bandwidth. Which feature can improve the amount of data transferred between two sites? A. B. C. D. Set the number of default sessions to 4 Enable the Fast Write feature on the McData device Set the Throttle value to 10 for all SAN Copy sessions Change the SAN Copy buffer size value to 2048 blocks Answer: B QUESTION: 5 Your customer wants to add an additional Storage Group to its existing Exchange environment. You calculated its database uses 20 spindles. How many spindles should you allocate for its Log LUNs? A. B. C. D. 2 5 6 8 Answer: A 3 http://www.certmagic.com
Slide 4: E20-820 QUESTION: 6 Click the Exhibit button. Review the replication solution shown in the graphic. In the event of production data corruption, which best describes the required steps to recover production data from the remote Snapshot? A. Unmount production LUNs, roll back Snap, restore mirror, mount production LUNs B. Unmount production LUNs, fracture, roll back Snap, synchronize, promote mirror, mount production LUNs C. Unmount production LUNs, promote mirror, fracture, roll back Snap, synchronize, promote mirror, mount production LUNs D. Unmount production LUNs, roll back Snap ,promote mirror, fracture, synchronize, promote mirror, mount production LUNs Answer: C QUESTION: 7 You need to design a SAN Copy solution for performance. Data will be copied from a source CX700 to a target CX700. The two arrays are attached to the same SAN. There are a total of four source LUNs to be copied to four target LUNs. Single initiator zoning has been created for SAN Copy to include all ports on both CX700 arrays. Initial SAN Copy session settings are as follows: Throttle level of 10 Buffer size of 2048 Blocks 4 http://www.certmagic.com
Slide 5: E20-820 How do you configure this SAN Copy implementation to ensure maximum throughput? A. Change Throttle Level to zero and Buffer Size to 512 Blocks B. Create a separate SAN Copy session for each source LUN and run one SAN Copy session at a time C. Create a separate SAN Copy session for each source LUN and run all SAN Copy sessions simultaneously D. Create one SAN Copy session and change zoning from single initiator to one large zone which includes all SP ports on both arrays Answer: C QUESTION: 8 The BMU Company runs an application with several LUNs that it wants to replicate remotely. You obtain the following information: There are five 4+1 RAID-5 LUNs of 256 GB each There are two RAID-1/0 LUNs of 128 GB each The application uses 4 KB random I/Os on the RAID-5 LUNs, with a read/write ratio of 4:1 On the RAID-1/0 LUNs, the application writes sequential 4 KB I/Os, with no reads Each LUN is on its own RAID Group, consisting of 146 GB drives Average seek distance on the RAID-5 LUNs is 35 GB Average seek distance on the RAID-1/0 LUNs is 0 GB Each RAID-5 LUN performs 400 IOPs Each RAID-1/0 LUN performs 500 IOPs RPO is 30 minutes Assume a 2:1 compression ratio for all data. What is the link speed needed to connect the MirrorView/A sites? A. B. C. D. 52 Mbps 104 Mbps 156 Mbps 208 Mbps Answer: A QUESTION: 9 Volume Managers allow the use of plaids on the CLARiiON. The primary performance impact is the manner in which CLARiiON LUNs are striped. Which two [2] points must be considered? 5 http://www.certmagic.com
Slide 6: E20-820 A. Plaids are only useful when the overlying applications are multi-threaded B. Use host based RAID implementations that do not require parity calculation C. Use host based RAID implementations that require parity calculation (i.e. RAID-3, RAID-5) D. LUNs should not be plaid together from RAID groups with different RAID types or stripe sizes E. The host manager stripe element size has to be equal to, or smaller than the CLARiiON LUN stripe size Answer: B, D QUESTION: 10 CDF Inc. wants to purchase a CLARiiON array to add to its SAN. Path Failover and Load Balancing are requirements. CDF already owns and uses DMP on its Symmetrix. What are two [2] solutions you would recommend? A. Dual HBAs with no cross zoning and DMP B. Dual HBAs with no cross zoning and PowerPath C. Multiple HBAs, Multi-path with cross zoning utilizing four FC ports per SP, and DMP D. Dual HBAs, Multi-path with cross zoning utilizing two FC ports per SP, and PowerPath E. Multiple HBAs, Multi-path with cross zoning utilizing four FC ports per SP, and PowerPath Answer: D, E QUESTION: 11 Which statement describes the method in which RM/SE creates SQL Server 2000 replicas? A. RM/SE works with the Virtual Device Interface (VDI) to make replicas B. RM/SE works with the Volume Shadow Copy Service (VSS) to make replicas C. RM/SE works with both the Volume Shadow Copy Service (VSS) and the Virtual Device Interface (VDI) to make replicas D. RM/SE does not require either the Virtual Device Interface (VDI) or the Volume Shadow Copy Service (VSS) to make replicas Answer: C QUESTION: 12 6 http://www.certmagic.com
Slide 7: E20-820 BST Bank is looking for a DR solution for its UNIX / Oracle based application which contains bank check images. BST Bank has a second datacenter in Denver which is 2,000 miles (3,600km) away. Details: Database = 500 GB spread across 8 LUNs on a CX 700 RPO = 2hrs DB updates = 1GB/hr Usable line speed = 45Mb/s Which DR solution do you recommend? A. Legato RepliStor, because this is the only solution which is platform independent B. Mirror View / S, because this is the only solution which covers the requested RPO C. Mirror View /A because this is the only solution which could cover consistency in its application D. SAN Copy incremental, because this is the only solution which could handle the incremental updates Answer: C QUESTION: 13 Your customer recently changed from using MirrorView for all its distance replication to using MirrorView/A. Its scripts took care of promotion in the case of a failure, and ran without incident when tested in the MirrorView environment. Those same scripts now fail, with errors which the customer says are related to permissions. What is a possible cause of the failure? A. B. C. D. The agent.config file does not exist in the user home directory The agent.config file does not exist in the Navisphere Agent directory The Navisphere security file does not exist in the user home directory The user names and host names do not appear in the privileged user list Answer: C QUESTION: 14 BNS, Ltd, located close to the International Airport in Tokyo Japan, is considering implementing a Disaster Recovery solution. The business requires the best availability possible and can afford only minimal downtime should a disaster occur. RTO is extremely important but RPO is less critical. BNS currently has a small mix of Windows and Sun Solaris servers attached to a CLARiiON CX500 at the airport site. It has plenty of network bandwidth between the airport site and the remote office less than 25 kilometers away. BNS also intends to utilize Legato AAM (Automated Availability Manager) to ensure speedy resumption of processing at the remote site. Which replication product would you 7 http://www.certmagic.com
Slide 8: E20-820 recommend if the customer repurposes a recently deactivated Symmetrix 3630 at the remote site? A. B. C. D. SRDF SAN Copy MirrorView Legato RepliStor Answer: B QUESTION: 15 PPR, LTD wants to deploy MV/A solution between New York and Berlin. PPR needs to know every day that all data has been properly propagated from the primary site. What do you recommend? A. B. C. D. Use Navisphere Analyzer and Data Lag parameter Use Navisphere Analyzer and Time Lag parameter Use Navisphere Analyzer and Snapshot Data Lag parameter Use Visual SAN to see the amount of data sent to the remote site Answer: A QUESTION: 16 The OHC Institute has been considering a MirrorView/A solution for its environment. You notice that OHC has a dedicated 10 Mb/s (ten megabit per second) link between its sites. The FC/IP converters the Institute intends to use are capable of 2:1 compression or better. The application LUNs which are to be mirrored have a total I/O load of 200 sequential 8kB writes and 400 sequential 8kB reads per second. OHC's RPO is 20 minutes. The total size of the application LUNs is 750 GB. Which two [2] statements correctly describe this environment? A. B. C. D. The Reserved LUN Pool on the local CLARiiON should be at least 1 GB in size The Reserved LUN Pool on the local CLARiiON should be at least 15 GB in size The Reserved LUN Pool on the remote CLARiiON should be at least 1 GB in size The Reserved LUN Pool on the remote CLARiiON should be at least 150 GB in size Answer: A, C QUESTION: 17 8 http://www.certmagic.com
Slide 9: E20-820 XDM Company has a Symmetrix array and it is running out of disk space. XDM purchased a CX-700 with MirrorView / SAN Copy and SnapView. Four of its main production servers need more space. XDM needs to move data from the Symmetrix array to the CX700. The CX-700 has a larger size target LUN than the Symmetrix source LUN. XDM agrees to give a minimum downtime window. The Symmetrix is connected to the SAN switch with 2 GB fiber. What is the best solution to move the data and get more space from the CX-700 CLARiiON? A. B. C. D. Connect both arrays to the same switch and do a Clone Connect both arrays to the same switch and do SAN Copy Connect both arrays to the same switch and do MirrorView Connect both arrays to the same switch, take a Clone then take a Snapshot of the Clone Answer: B QUESTION: 18 ABC Corp wants to implement a local backup and recovery solution for an Exchange 2003 two-node active/passive MSCS using RM-SE on a CX700. The cluster has four LUNs. There are two Exchange Storage Groups, each one a dedicated LUN and each has a dedicated Log LUN. ABC wants to schedule these jobs to run twice daily and the replicas need to be verified as consistent. Which configuration will meet these requirements? A. Create two RM-SE replica jobs and use a mount host outside the cluster to both schedule and verify the replicas prior to backup B. Create one RM-SE replica job and use the passive node of the cluster to both schedule the job and verify the replica prior to backup C. Create two RM-SE replica jobs and use the passive node to schedule the jobs and a mount host outside the cluster to verify the replicas prior to backup D. Create four RM-SE replica jobs and use the passive node to schedule the jobs and a mount host outside the cluster to verify the replicas prior to backup Answer: A QUESTION: 19 ABC Company purchased a CX500 to be dedicated to its Windows 2003 MS SQL environment. How big should the storage array cache block be to match the SQL Server data block size? A. 2KB 9 http://www.certmagic.com
Slide 10: E20-820 B. 4KB C. 8KB D. 16KB Answer: C QUESTION: 20 The SML Casino Corporation keeps a database of all customer activity on local storage. SML wishes to move the database onto a CLARiiON. You notice that it has a large TEMP space which is receiving I/O requests of 1 MB in size. What do you do to optimize the performance of this TEMP space? A. B. C. D. Set the LUN Idle Count to 2047 Set the LUN disable size to 2047 Set the Element Size Multiplier to 48 Set the LUN write-aside value to 2049 Answer: D 10 http://www.certmagic.com