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Download DemoVendor: IBM
Certifications: IBM Certified Specialist - Storwize Family Technical Solutions V4
Exam Code: C9020-562
Exam Name: IBM Storwize Family Technical Solutions V4
Updated: Nov 27, 2024
Q&As: 60
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A customer is looking to enhance its existing environment with the addition of an IBM Storwize V7000. The customer currently has an EMC VNX and wants to better utilize this storage.
Which two IBM Storwize features must be licensed to address the customer's needs? (Choose two.)
A. Thin provisioning
B. Tieredstorage optimizer
C. Replication
D. Real-time Compression
E. External virtualization
Correct Answer: AB
A: Thin Provisioning (Oversubscribing)
Thin LUNs are supported. Care must be taken for the LUNs not to become over allocated or SVC will take
the MDisk and itsMDiskgroup offline, until corrected.
B: EMC VNX LUN configuration
The storage is provisioned from the VNX as LUNs, that appear as managed disks (Mdisks) on the SVC, which can use them to create storage pools (MDiskgroups) to provision SVC volumes (VDisks) for use by hosts or for use with tiering.
A customer is complaining about poor disk performance and has updated the controller code to the 7.3 release in an attempt to resolve this concern. A review of the storage identifies a disk pool which contains seven MDisks as the potential problem.
The MDisk assignment is:
Four MDisks are configured as 8-drive RAID 5 Three MDisks are configured as 6-drive RAID 5
You point out that his practice may be the cause of the performance concern.
Which steps should be recommended to the customer?
A. 1. Create new MDisks constructed as an 8-drive RAID 5, add them to the disk pool.2. Remove each of the 6-drive MDisks from the pool.3. Let the automatic disk pool rebalance feature in the 7.3 code rebalance in the data across the MDisks.
B. 1. Add two extra drives to each MDisk containing only sex drives.2. Use the automatic disk pool rebalance feature in the 7.3 code to rebalance the data across the MDisks.
C. 1. Create new MDisks constructed as an 8-drive RAID 5, add them to the disk pool.2. Use a script to rebalance the data across the MDisks.3. Remove each of the 6-drive MDisks from the pool.
D. 1. Add two extra drives to each MDisk containing only six drives.2. Use a script to rebalance the data across the MDisks.
Correct Answer: A
What you have to do is create a new Disk Group (mdisk) and add to your existing Pool (mdiskgrp).
The new versions ofSVC / Storwize Version 7.3 can automatically rebalance the workloads across the mdisks. If you have switched this on, this rebalance script should no longer be used.
An IBM technical specialist has positioned the IBM FlashSystem V9000 storage solution to meet a customer's requirement for a storage solution to host high IOPS with low latency workloads. The IBM FlashSystem V9000 uses an IBM patented Variable Stripe RAID with two dimensional Flash RAID technology.
Which statements describe these features?
A. The Variable Stripe Array function stripes data across its set of chips within a MicroLatency Module.Two Dimensional Flash RAID function provides protection for the MicroLatency Modules.
B. TheVariable Stripe Array function stripes data across its set of chips within a MicroLatency Module.Two Dimensional Flash RAID function provides cluster protection between two installed FlashSystem V9000 systems.
C. The Variable Stripe Array function stripes data across all the installed MicroLatency Modules.Two Dimensional Flash RAID function provides protection across DIMM memory within a MicroLatency Module.
D. The Variable Stripe Array function stripes data across DIMM memory within a MicroLatency Module.Two Dimensional Flash RAID function provides protection for the MicroLatency Modules.
Correct Answer: A
IBM Variable Stripe RAID is a patented IBM technology that provides an intra-module RAID stripe on each flash module. With two-dimensional (2D) Flash RAID,system-wide RAID 5 along with Variable Stripe RAID helps reduce downtime and maintain performance, and enables the provisioning of an entire flash module as a spare to be used in another flash module failure.
References: Introducing and Implementing IBMFlashSystem V9000, page 22 http:// www.redbooks.ibm.com/redbooks/pdfs/sg248273.pdf
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