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IBM C4090-453 Exam Syllabus Topics:

IBM System Storage DS8000 Technical Solutions V3 Sample Questions:

1. A pre-sales TDA must be done for the sale of a new DS8870. Which document type should be used for documenting the review details?

A) The D58870 Technical and Delivery Assessment (TDA) Guide
B) The IBM System Storage High End Disk Technical and Delivery Assessment (TDA) Guide
C) No special document format is required for the review summary
D) The generic STG pre-sales TDA guide

2. If a customer experiences significant technical issues with an installed DS8000 system, which action should be taken immediately to report them?

A) Contact the responsible IBM sales representative who must handle all related communications
B) IBM automatically opens an internal problem record based on the Call Home messages
C) The responsible IBM Customer Service Representative needs to open a problem record
D) The customer needs to open a problem management request (PMR)

3. 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 0 because archive data isn't mission critical and they should use tape backup
B) RAID 6 because the time to rebuild NL-SAS drives would leave the array exposed for a long time after a single disk failure
C) RAID 10 because this is the only protection supported for NL-SAS drives
D) RAID 5 because data on these drives is less critical than the production data

4. A customer has a UNIX-based 25 TB Oracle/SAP instance currently running on an HP 12000 Enterprise Storage array. The database is very sensitive to response times and is reported to have a peak I/O requirement of over 25,000 I/O per second. The HP device is nearly three years old, and the customer is considering replacing it.
Which of the following is the best way to investigate the IBM DS8000 as a suitable technology replacement for the HP 12000 device?

A) Ask the customer if they can estimate the workload characteristics.
B) Ask the customer on what basis HP sized the HP 12000 Storage Array originally, and make an assessment from that information.
C) Ask the customer for IOSTAT output from the server or servers and use it as an input to a Disk Magic model.
D) Use the Internet to find out the capabilities of an HP 12000 Storage Array and configure an equivalent IBM D58800.

5. A potential D68870 customer asks the technical specialist which extent size is used to relocate hot extents from normal SAS disk resources to SSDs because they want to understand IBM's adjustment compared to the other high end disk suppliers.
Which is the extent size used for DSS000 Easy Tier data relocation?

A) 2 BG
B) 1 GB
C) 8 GB
D) 256 MB

Solutions: