Online Access Free E20-885 Practice Test

An SQL server is connected to a VNX array using dual HBAs connected to separate fabric switches with no ISLs (Inter Switch Links). PowerPath is used for multipathing. What is theminimum acceptable response time threshold that will ensure server to storage response time for log file write operations is "very good"?

• A.<10ms
• B.<12ms
• C.<3ms
• D.<5ms

Click on the calculator in the upper left-hand corner.
An Exchange 2010 environment with 60% reads and 40% writes will be configured on an EMC VNX using RAID 1/0 15K SAS drives. The total I/O per second required is 3,000. Accounting for additional overhead for spikes, what is the number of spindles required?

• A.32
• B.30
• C.28
• D.24

A customer runs a CAD/CAM application on an VNX file system. The application is accessed by users at multiple sites. The users report degraded response during peak access periods. Performance monitoring of the file system shows a higher than expected disk queue length and a higher than expected number of unused blocks pre-fetched.
What is the likely cause of the performance issue?

• A.Single-threaded random reads over-utilize pre-fetching
• B.Single-threaded sequential reads flooding cache
• C.Multi-threaded random reads degrading per-thread performance
• D.Multi-threaded sequential reads causing random access patterns

A system administrator wants to migrate medical-imaging data stored on an EMC VNX. The host connects to the VNX via iSCSI. The IP SAN infrastructure has recently been updated to support 1 Gb/10 GB switching. The system administrator wants to maximize data transfer performance. What would you recommend?

• A.Implement 10 Gb/s iSCSI connection using a 9000 byte frame.
• B.Increase the write-aside value.
• C.Use a 4 KB memory page size.
• D.Implement 10 Gb/s iSCSI connection using a 2400 byte frame.

A storage administrator reports they are unable configure SAN Copy connections between two VNX. The required cabling is in place and zoning is correct, but the SP connections still do not appear in Unisphere Manager. What could have caused this issue?

• A.The SP ports are already being used by hosts.
• B.SAN Copy is not installed on both VNX arrays.
• C.SAN Copy is only licensed for local copies.
• D.Both VNX arrays are not in the same domain.