Free EMC E20-885 Exam Dumps Questions & Answers

You are setting up Perfmon to record the number of I/O per second for a customer's clustered SQL Server prior to a migration to an EMC VNX. Which Perfmon counter should you add to the log view to obtain this information?

• A.  Logical Disk\Disk Reads/sec and Logical Disk\Disk Writes/sec of the database LUNs
• B.  Logical Disk\Disk Reads/sec and Logical Disk\Disk Writes/sec of the database and log LUNs
• C.  Physical Disk\Disk Reads/sec and Physical Disk\Disk Writes/sec of the database and log LUNs
• D.  Physical Disk\Disk Reads/sec and Physical Disk\Disk Writes/sec of the database LUNs

A customer has three production hosts connected to a VNX. Each host has two 150 GB LUNs in the same RAID 5 (4+1) RAID group. Replication Manager is configured to take SnapView snapshots of the production host LUNs for local backups using a dedicated backup host. The RLP (reserved LUN pool) is configured on the same RAID group as the production host LUNs. The customer reports there are performance slowdowns during backups.
What is the best solution?

• A.  Expand the source LUN RAID group to a RAID 5 (8+1) RAID group, and expand the sizes of the reserved LUNs to twice their original value.
• B.  Create a new RAID 5 (4+1) RAID group, create new LUNs on the RAID group, and perform a LUN migration on the RLP LUNs to the new RAID group.
• C.  Stop the snapshots, remove the LUNs from the RLP, create a new RAID 5 (4+1) group and new LUNs, and add the new LUNs to the RLP.
• D.  Stop the snapshots, create a new RAID 1/0 (2+2) RAID group, create new LUNs on the new RAID group, and migrate the RLP to the new LUNs.

A customer has two identically configured Linux hosts (OS version, memory, CPU) attached to the same network. One host is NFS-attached and the other is FC-attached to an EMC VNX. Both the NFS file systems and the SAN LUNs are created from four RAID 5 (4+1) RAID groups. LUNs are not shared between file and block.
The customer reports NFS-attached host is able to achieve much greater throughput via NFSv4 versus the FC-attached host.
What is the source of the performance difference between the file and block configurations?

• A.  Host Patch levels
• B.  FC encapsulation overhead
• C.  I/O size
• D.  NFS version

A customer has a highly active ordering application with a R/W ratio of 2:1. The application peaks at about 16,000 application IOPS during the day.
What is the minimum required number of eMLC Flash drives and 10K rpm SAS drives needed in a R5 Storage Pool to meet the performance requirements?

• A.  140 SAS drives, 5 Flash drives
• B.  95 SAS drives, 5 Flash drives
• C.  165 SAS drives, 5 Flash drives
• D.  80 SAS drives, 5 Flash drives

A customer plans to use SAN Copy to make consistent copies of their Windows 2003 and 2008 production environment at their remote site. Before starting the SAN Copy session, what action should they take to ensure any pending I/O from the buffers is committed?

• A.  admhost lun_flush
• B.  admhost lun_activate
• C.  admhost lun_update
• D.  admhost lun_deactivate