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IBM C4090-453 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Storage Management and Operations | - Performance monitoring and optimization - Volume management and provisioning |
| DS8000 Architecture and Concepts | - System architecture overview - Hardware components and virtualization concepts |
| Troubleshooting and Maintenance | - System maintenance procedures - Problem determination and diagnostics |
| Copy Services | - FlashCopy functions - Metro Mirror (PPRC synchronous replication) - Global Mirror (asynchronous replication) |
| Installation and Configuration | - Initial system setup and planning - Host attachment and connectivity configuration |
IBM System Storage DS8000 Technical Solutions V3 Sample Questions:
Which of the following statements about the three-site solution Metro z/QS Global Mirror (MzGM) is true?
- A. MzGM can be managed by GDPS and Tivoli Storage Productively Center
- B. MzGM is a multi-target solution where the primary device is replicated both synchronously and asynchronously
- C. MzGM supports distributed systems data on PB devices
- D. MzGM does not support z/Linux data on CKD devices
Correct Answer: B 🗳️
A customer has an existing D68800 which is installed in their data center. It now must have an extra frame added to support additional capacity growth, but there is no room to fit the expansion frame to the right.
Which option should be taken?
- A. Disruptively relocate the D68800 to make space to the right of the base frame for the expansion frame
- B. Configure the expansion frame with the DS8000 Passthrough feature to allow placement of the frame anywhere
- C. Create an MES to replace all of the existing capacity with larger drives which support both the existing workload and the planned increase
- D. Fit the expansion frame to the left of the base frame
Correct Answer: A 🗳️
After initial installation of DSSSOO systems in a customer site a review must be conducted to verify that the disk system performance is in range.
How can the cache hit ratio be verified?
- A. Use Tivoli Storage Productively Center
- B. Use the DSS000 Real Time Performance Monitor
- C. Issue the CLI command dscli>verify-perf-read hit-time period
- D. Use the pen stat command in the CLI
Correct Answer: A 🗳️
A System z customer would like confirmation of the actual amount of additional storage capacity they will get if they add a drive set of 300 GB 15,000 rpm drives in a RAID 5 configuration.
Which tool would be used to provide this information?
- A. Capacity Magic
- B. Disk Magic
- C. Comprestimator
- D. RMF Magic
Correct Answer: A 🗳️
A customer already has a D38000 with RAID 10 protection for their production data. They want to implement NL-SAS drives in the same DS8000 for archive data.
Which disk protection should be used for this and why?
- A. RAID 10 because this is the only protection supported for NL-SAS drives
- B. RAID 5 because data on these drives is less critical than the production data
- C. RAID 0 because archive data isn't mission critical and they should use tape backup
- D. RAID 6 because the time to rebuild NL-SAS drives would leave the array exposed for a long time after a single disk failure
Correct Answer: D 🗳️
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