E20-326 Online Practice Questions and Answers

A major telecommunications operator is planning to consolidate multiple mid-tier storage arrays to a single Symmetrix VMAX solution. Their existing environment includes IBM AIX servers, HP-UX Servers and Windows 2003 Servers.

When documenting the existing Server environment, which command can be used on the HP-UX Servers, to list the software modules installed?

A. swlist

B. lslpp

C. pkginfo

D. pkgchk

What can happen if an over-subscribed thin pool becomes full?

A. writes to unallocated extents on TDEV's fail and an I/O error is returned. If the host is booting from SAN, this may also result in a server hang condition.

B. writes to unallocated extents on TDEV's continue within cache and the virtual pool is automatically expanded to the needed level.

C. writes to unallocated extents on TDEV's stay in a queued state until the storage administrator can assign additional capacity.

D. writes to unallocated extents on TDEV's continue within cache and the virtual pool is not automatically expanded to the needed level.

Which FAST VP control parameter defines the amount of time FAST VP should wait after a thin device is brought under FAST VP control before performing a data movement?

A. Initial Analysis Period

B. Workload Analysis Period

C. Pool Reserved Capacity

D. Fast VP Relocation Rate

Refer to the Exhibit.

The illustration shows the workload characteristics of a DMX which is due to be upgraded to a VMAX. Which conclusion can you draw?

A. Front-end IOs outnumber the back-end IOs, because some IOs are satisfied in cache

B. Front-end IOs outnumber the back-end IOs, because the devices involved are R2 targets

C. Front-end and back-end IOs are unrelated to each other

D. Front-end IOs outnumber the back-end IOs, because there were a lot of clone operations being performed

Which operations are allowed by Open Replicator/DM?

A. All functions except offline pull

B. All functions except online push

C. All functions except online pull

D. All functions except offline push

The SiRT featured is enabled on the RA in an SRDF/S configuration. When does the host receive the acknowledgement of a write?

A. IO is written to the cache at the R2 site and acknowledgement is received by the R1 site from R2 site.

B. IO is written at R1 site cache and is sent to the R2 site.

C. IO is written to R2 site cache but not acknowledged yet.

D. Immediately after the IO is written to R1 cache.

By default, how much storage is allocated when a thin device is bound to a pool?

A. 1 extent

B. 1 track

C. 12 extents

D. 64 tracks

A customer is using a Symmetrix VMAX and FAST DP. They are using striped meta devices to overcome the device size limit of a single device.

What happens when FAST determines "hot spots" and starts moving these to other disks?

A. The entire meta device is moved to another disk group

B. Only the meta members containing the hot spots are moved to another disk group

C. Only the extents that contain the hot spots are moved to another disk group

D. Only the tracks that contain the hot spots are moved to another disk group

You are designing an SRDF/S solution. Network bandwidth can be purchased in increments of single OC3 (155 Mb/s) links. Data compression is not in use. The workload profile is as follows:

Total I/Os per second = 30,000 Read block size = 4 KB Write block size = 4 KB Writes = 30%

How many OC3 links should be recommended?

A. 2

B. 4

C. 6

D. 8

A proposed SRDF/S solution was modeled with BCSD using host-based data. The BCSD model assumed two-engine VMAX arrays with SRDF Fibre ports. The Compressed Throughput chart shows that the available throughput is greater than the peak throughput. The Volume Exceptions table lists ten devices.

What should be recommended?

A. Change the application layout

B. Use three-engine VMAX arrays

C. Provide more bandwidth

D. Turn off software compression on the remote adapters