A customer reported degraded performance with several of the applications that run on a VNX. After reviewing the performance data on the array, you find that all the performance issues are related to one RAID 5 RAID Group. Specifically, this RAID Group is performing 50 percent fewer IOPS than previously.
What is the most likely reason?
A. The RAID Group is rebuilding.
B. The RAID Group is trespassed.
C. Write cache is not configured.
D. Read cache is not configured.
A Storage Administrator wants to create a striped 4 TB metaLUN to present to an application server. They plan to use a base LUN size of 1.4 TB made from a RAID 5 (4+1) protected RAID Group of 600 GB SAS drives.
According to EMC best practices, where should additional component LUNs used to create the metaLUN be created?
A. On at least two RAID 6 (6+2) RAID Groups composed of 2 TB NL_SAS drives
B. On at least two RAID 5 (4+1) RAID Groups composed of 600 GB SAS drives
C. On at least two RAID 5 (8+1) RAID Groups composed of 600 GB SAS drives
D. On at least two RAID 1/0 RAID Groups, each with 4 x 600 GB SAS drives
When creating a RAID 5 RAID Group from SAS disks, EMC best practice recommends selecting drives from the same bus.
Why?
A. There is little, if any, performance increase from using multiple busses.
B. Hot spares are always chosen from the same bus as the majority of disks in the RAID Group.
C. There is a slight decrease in performance when using multiple busses.
D. Only RAID 1/0 groups can be created across multiple busses.
When creating a RAID 6 RAID Group, what is the maximum number of disks that can be incorporated?
A. 16
B. 24
C. 32
D. 40
Which RAID Group settings are appropriate for workloads consisting of predominantly large block, random read I/O profiles such as data warehousing?
A. 4+1 RAID 5 RAID Group; LUN element size set to 128
B. 8+1 RAID 5 RAID Group; LUN element size set to 512
C. 8+1 RAID 5 RAID Group; LUN element size set to 1024
D. 4+1 RAID 5 RAID Group; LUN element size set to 1024
A Storage Administrator wants to use all available bandwidth to connect a VMware ESXi host to a VNX. They decide to use two identical CNAs as well as two NICs. They do this so they can utilize FCoE for some VMs and iSCSI for other VMs. They install different instances of the Unisphere Host Agent on each VM. The performance of the iSCSI VMs is lower than expected.
What can be done to enhance storage access performance?
A. Replace the NICs in the physical host with iSCSI HBAs.
B. Using FCoE on some and iSCSI on other VMs on the same physical host is not supported.
C. Do not mix FCoE and iSCSI on the same physical host.
D. Disable Jumbo Frames on the Ethernet SAN.
A new VNX for Block customer uses third-party framework software to monitor their environment.
Which Unisphere feature will assist the customer with monitoring the VNX?
A. Syslog
B. SNMP
C. SMTP
D. Call home
A Storage Administrator wants to use all available bandwidth to connect a VMware ESXi host to a VNX. They decide to use the CNAs as well as some NICs. They do this so they can utilize FCoE for some VMs and iSCSI for other VMs. They notice that the VMs using FCoE do not have access to their LUNs.
What is most likely causing this issue?
A. Jumbo frames are not configured on the Ethernet SAN.
B. FCoE and iSCSI are not allowed to be used at the same time by the same physical host or its VMs.
C. Multiple FC frames are being aggregated together.
D. FCoE is already being used for SAN Copy.
A customer is concerned about maintaining the appropriate level of redundancy. The customer asks you to explain how VNX for File handles notification of system conditions and SNMP trap notifications. Which VNX hardware component should you discuss?
A. Control Station
B. Storage Processors
C. Data Mover
D. Link Control Card
How often are auditing configuration files and the current audit log file backed up for each active Control Station?
A. Every 120 seconds
B. Every 180 seconds
C. Every 300 seconds
D. Every 600 seconds
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