Which LUN type presents more storage to an application than is physically allocated?
A. Thick LUN
B. Thin LUN
C. RLP LUN
D. Clone Private LUN
A customer's EMC VNX supports several Windows and UNIX application servers. The customer is concerned about VNX performance. By monitoring their switches, they notice there is heavy traffic between the servers and the VNX. On the VNX, the hard disks seem to be heavily accessed.
The customer wants to identify which application server workload type may be causing the observed behavior. What compound server_stats command do you suggest?
A. cifs-std and nfs-std
B. cifsOps-std and nfsOps-std
C. diskVolumes-std and netDevices-std
D. cifs and nfs
A customer has a production CLARiiON replicating to a secondary CLARiiON at a remote site using MirrorView/S. The customer wants to upgrade to new EMC VNX, but due to cost constraints, they can only upgrade one of the CLARiiON arrays at this time.
How do you advise the customer?
A. A mirror relationship cannot exist between CLARiiON and VNX LUNs.
B. Replication between faster ports and slower ports is not supported.
C. Storage pool LUNs cannot mirror to RAID group LUNs.
D. VNX can only replicate to other VNX arrays.
You are planning a CIFS DR solution with an EMC VNX for File. The customer wants to use LACP (Link Aggregation Control Protocol) on the Data Movers to provide additional network redundancy for the solution.
What do you advise the customer regarding Data Mover interfaces and CIFS servers for the DR solution?
A. Identical interface names must be used on the source and destination VNX systems.
B. Identical interface IP addressing is required for the source and destination VNX systems.
C. The CIFS server interface is an object that gets replicated with the Virtual Data Mover.
D. The Virtual Data Mover will use any available interface on the Data Mover for the CIFS server.
A customer wants to create a file system for a highly sequential application. They plan to use the EMC VNX AVM feature to create the file system, using the clarsas_archive pool in a RAID 5 (4+1) configuration. They want to know how much data is being written to each dvol in the pool entry. Which property would they examine?
A. stripe length
B. block size
C. queue depth
D. stripe depth
A customer plans to connect ESXi 5.0 hosts to a new EMC VNX array. They want to take advantage of the hardware-assisted locking feature in VAAI. Which is a feature of hardware- assisted locking?
A. Locking at the block level of a logical unit
B. Locking the LUN instead of the block level
C. Accessing a block from multiple hosts at the same time
D. Automatic enabling of safe data caching
A customer has two EMC VNX, one at the primary site and the other at a DR site located 100 km away. The WAN connection between sites is a 100 Mb/s dark fiber link with 4 ms latency.
A previous storage administrator configured the pool LUNs for the file system on thin LUNs. The file system is growing at a rate of 500 GB per week and is on a VDM. The new storage administrator reports performance issues with the file system. What is the most likely reason for the performance issue?
A. Thin LUNs are used for the file system.
B. The WAN link should be upgraded to an eLAN.
C. The VNX system requires an upgrade.
D. The file system has too many concurrent users connected.
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 and each host generates the same size I/O.
The customer reports the FC-attached host is able to achieve much greater throughput than the NFS-
attached host.
What is the source of the performance difference between the file and block configurations?
A. FC encapsulation overhead
B. Host Patch levels
C. Ethernet Network
D. NFS version
A client has an EMC VNX configured with four storage ports, four 15-drive DAEs (disk array enclosures) and a total of forty drives (20 NL-SAS and 20 SAS drives). The client is using RAID 5 (4+1) RAID groups with a traditional LUN configuration.
What is the recommended SAS LCC port configuration for optimal performance?
A. Distribute drives evenly across all ports
B. Distribute drives on all odd ports
C. Distribute drives on all even ports
D. Distribute drives on a single port
A customer requests a performance review of their EMC VNX before FAST Cache is implemented. You notice a dedicated LUN has a write size of 4 KB, and the disks are performing writes of 8 KB. What is causing this behavior?
A. Coalescing
B. Pre-fetching
C. Flushing
D. Promotion
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