IBM C4090-453 : IBM System Storage DS8000 Technical Solutions V3

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IBM System Storage DS8000 Technical Solutions V3 Sample Questions:

1. 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

2. Which tool can a customer use without assistance to determine whether a mixture of different disk types, in conjunction with Easy Tier, could improve performance on a DS8000?

A) Pre-Sales Advisor
B) Storage Tier Advisor
C) Capacity Magic
D) Disk Magic

3. A customer has submitted an REP for which a DS8870 is the preferred solution to support their VMware environment. They require support for VAAI Extended Copy.
What should the technical specialist advise this customer?

A) A DS8870 with FlashCopy should be proposed
B) VAAI is only a host function so any disk subsystem can be considered
C) DS8870 supports the VAAI functionality required by this customer
D) A SAN Volume Controller must be proposed along with the DS8870 to provide VAAI support

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

5. The DS CLI can be invoked in which three modes?
1.Single-shot command mode
2.Interactive command mode
3.Script command mode
4.Background command mode

A) 1, 3, 4
B) 2, 3, 4
C) 1, 2, 4
D) 1, 2, 3

Solutions: