E20-335 Symmetrix Solutions Specialist Study Guide For Implementation Engineers

Front 1

A customer has asked you to create a configuration for a single engine Symmetrix VMAX array with 8 DAEs and 64 data drives. They would like to have the data devices with RAID 5 (7+1) protection.

What is the largest number of members recommended for a striped metavolume?

Back 1

8

Front 2

A customer wants to archive data currently residing on a Fibre Channel thin pool to SATA storage within the same Symmetrix VMAX array running 5875 Enginuity code. Which technology would support the migration effort?

Back 2

VLUN VP

Front 3

What is an accurate statement about static Symmetrix tiers?

Back 3

Must be set up explicitly by the user and manually maintained

Front 4

What is a valid reason to pre-allocate space when binding TDEV devices?

Back 4

????? Prevents the pool from filling up

Front 5

What is an advantage of thin provisioning and oversubscription in the Symmetrix VMAX?

Back 5

Addresses inefficiency of underutilized storage

Front 6

A thin device assigned to a UNIX environment is going to be migrated using Virtual LUN VP. How might this impact other operational activities?

Back 6

All FAST VP movements in progress for the device will be aborted

Front 7

In a single-hop SRDF/AR setup, the options have been set as follows:

Cycle Time = 3000
Delay Time = 4000
Overflow = Immediate

The symreplicate session was started at time 0. The actual cycle time was 2000 seconds. How many seconds after the start of the first cycle will the next cycle start?

Back 7

6000

Front 8

When configuring a Symmetrix VMAX array for TimeFinder/Snap, which device type must be placed in a pool?

Back 8

SAVE

Front 9

After acquiring a company 300 hundred miles from their current office, a customer has asked EMC to help architect a single-hop application recovery plan. After careful analysis of the workload and available bandwidth, SRDF/AR was selected as the solution.

If the SRDF/AR cycle time is set to 45 minutes, what is the maximum potential data loss?

Back 9

90 minutes

Front 10

As part of an SRDF implementation, SRDF device pairs have been split. What is the expected status of the R1 and R2 devices after the split?

Back 10

R1 Read/Write; R2 Read/Write

Front 11

A customer is planning to install Symmetrix Management Console to manage their local Symmetrix. What other software package is required?

Back 11

Solutions Enabler

Front 12

Several months after installing Symmetrix Performance Analyzer (SPA) you begin to receive feedback from the storage administrators that SPA is slow in running queries. You have not changed which arrays are being monitored or the statistics being gathered since the installation.

What is the first recommended action you should take to improve SPA performance?

Back 12

In the Administration menu, select => Database Management => Optimize

Front 13

When installing Solutions Enabler on a Microsoft Windows server, what will the SYMRECOVER component provide?

Back 13

Installs the SRDF session recovery and Star component

Front 14

Which command can be used by a Symmetrix VMAX storage administrator to verify current configuration change operations on an array?

Back 14

???? symconfigure query

Front 15

Which option distinguishes FLM from an Open Replicator data transfer?

Back 15

-migrate

Front 16

A storage group in a Symmetrix VMAX is associated with a FAST policy. The policy states that up to 50% of the storage can reside on a RAID 5 (3+1) EFD tier and 50% of the storage can reside on a RAID 1 Fibre Channel tier.

What is a result of this association?

Back 16

All FAST related promotions and demotions will be device swaps within the storage group

Front 17

A customer wants to perform SRDF operations using the Consistency Exempt flag on a subset of devices in an SRDF/A group. Which SRDF operation is allowed?

Back 17

Suspend

Front 18

A customer has enabled Symmetrix Management Console (SMC) to post alerts on Virtual Provisioning. By default, at which utilization level does SMC start issuing warning messages about pool capacity usage?

Back 18

50 ?????

Front 19

How does Transmit Idle help in an SRDF/A deployment?

Back 19

Keeps the session active during a link loss

Front 20

A storage administrator is utilizing a Symmetrix for disaster recovery. The Symmetrix is being utilized for open systems. The 64-bit IBM AIX host requirements will be increasing significantly over the next year.

The current file systems are 8 TB and are forecasted to grow 75% over the next 12 months. Average file sizes are 20-25 GB in size. The administrator needs to plan for this growth.

What is the most relevant size limitation?

Back 20

XX16 TB file system limit for JFS2 - incorrect should be 32TB

Front 21

An open systems management host is managing an SRDF/A environment with Multi-Session Consistency (MSC) enabled. What happens if this management host is accidentally shut down?

Back 21

MSC cycle switching will stop

Front 22

What is the maximum number of thin pools that can exist in the Symmetrix VMAX array?

Back 22

512

Front 23

What is required for a host to use Enginuity Consistency Assist (ECA) to perform TimeFinder/Snap consistent activation across multiple heterogeneous hosts?

Back 23

A dedicated channel to the gatekeeper devices

Front 24

A storage administrator wants to build a storage group to support the implementation of FAST VP on their Symmetrix VMAX storage array. Which type of device can NOT be contained in the storage group?

Back 24

TDAT

Front 25

An administrator wants to know how they can utilize their existing RDF2 device group to create clone sessions with the R2 sessions as source devices and STD devices as targets. How would you respond?

Back 25

Add the STD devices with the -tgt option to the existing RDF2 device group

Front 26

A customer is planning to install a new Symmetrix VMAX. Data from their older storage array will be transferred to the VMAX using Open Replicator. Fibre Channel directors 7E:0 and 8E:0 on the Symmetrix VMAX will be zoned to the remote array for Open Replicator data transfer.

Seventy percent of the director bandwidth of 7E:0 and 30 percent of the director bandwidth of 8E:0 may be used by Open Replicator. Which settings should be set on the directors?

Back 26

The ceiling for 7E:0 should be set to 70%
The ceiling for 8E:0 should be set to 30%

Front 27

Refer to the Graphic. What is the correct state for the R1-BCV and the R2 prior to issuing a symreplicate start command?

Back 27

Suspended

Front 28

An EMC Implementation Engineer (IE) is performing routine maintenance on a Symmetrix-attached host. The IE needs to find out which patches have been installed on a specific Sun host.

Which command should be used?

Back 28

patchadd -p

Front 29

An Open Replicator create operation failed. The error message in the SYMAPI log file has the following entry:

SANCOPY_DEV_REMOTE_DEVICE_TOO_LARGE

What could be the cause of this error?

Back 29

Pull operation to a smaller control device

Front 30

What is the maximum number of Open Replicator sessions allowed running Enginuity 5875?

Back 30

1024

Front 31

When creating metavolumes, what is the maximum number of members that a Symmetrix VMAX array supports?

Back 31

255

Front 32

Which Solutions Enabler command manages the ability for multiple hosts to share the same Symmetrix VMAX front-end port without conflict?

Back 32

symaccess

Front 33

Which document should an EMC customer consult if there are questions about a system design during an SRDF/A engagement?

Back 33

Configuration Guide

Front 34

A customer is in the process of implementing a TimeFinder/Clone solution. What is the maximum number of differential copies of a single standard source device?

Back 34

8

Front 35

A customer is running their applications on SRDF R2 volumes after a disaster. Which step must be taken before an SRDF failback is performed to ensure data integrity?

Back 35

Stop all application I/O to the R2 devices

Front 36

You are sizing the bandwidth needed for a new SRDF/AR implementation. You have Change Tracker enabled on the volumes designated for replication. You have set the initial mark action at 9:00 A.M. and data is collected ever hour for 12 hours. At 12:15 P.M. you look at the DELTA report and begin to examine the results.

What is the shortest period of time that you could examine?

Back 36

1 hour

Front 37

Links have been lost for an extended period of time. After the links have been restored, what is recommended prior to performing an SRDF resume operation?

Back 37

Set mode to Adaptive Copy Disk

Front 38

When binding a TDEV to a thin pool, how many tracks are allocated by default?

Back 38

12

Front 39

The SAN zones (Zones 3 and 4) shown in the graphic have been created during an Open Replicator implementation. The control devices in the Symmetrix array are mapped to all four front-end ports.

Which Open Replicator operations can be performed?

Back 39

Cold Push and Cold Pull only

Front 40

A Symmetrix VMAX customer is managing a Virtual Provisioning environment from a UNIX host. They want to monitor their thin pool by issuing alerts to the UNIX syslog.

Which tool(s) is best suited for this purpose?

Back 40

Event daemon (storevntd)

Front 41

You are planning to install Symmetrix Performance Analyzer (SPA) on a Microsoft Windows host. You want to verify that SPA will be able to collect data from a Symmetrix array through another host attached directly to the array. You will be using the Advanced Diagnostic view for troubleshooting.

Which configuration setting do you need to check on the host attached to the array?

Back 41

Solutions Enabler storsrvd daemon is installed and running

Front 42

A customer has built the necessary infrastructure at the remote site for application restart. What is the primary impact to the customer of a single-hop SRDF/AR solution when compared to SRDF/S in the event of a failure at the primary production site?

Back 42

Increased network bandwidth is needed with SRDF/S

Front 43

While implementing a new Symmetrix solution, a customer requests that five new hosts be added to the project. This is outside the scope of the project.

Which step needs to be taken?

Back 43

Notify the project manager to create a Change Request

Front 44

What is the correct sequence in which the differential TimeFinder/Clone actions can be executed?

Back 44

1. Create
2. Activate
3. Recreate
4. Terminate

Front 45

How many mirror positions on a Symmetrix VMAX does a RAID 5 volume with SRDF protection consume?

Back 45

2

Front 46

An administrator wants to create a clone session on a Symmetrix DMX array between devices 0157 (source) and 0158 (target). When issuing the create command, the response is:

"Cannot use the device for this function because it is a Copy Session source."

What is indicated by this response?

Back 46

SymDev 0158 is the source of another clone session

Front 47

Open Replicator will be used to move data from a Symmetrix VMAX array to a CLARiiON array. The CLARiiON has not been discovered by the host from which the Open Replicator commands are issued.

Which information has to be specified in the Open Replicator device file?

Back 47

WWN of the CLARiiON LUN

Front 48

A customer is considering a long distance replication solution. Due to bandwidth limitations and distance, SRDF/A has been selected.

With a customer-selected minimum cycle time of 30 seconds, what is the worst case RPO under normal operating conditions?

Back 48

60 seconds

Front 49

When does a VDEV become host-accessible and how can it be verified?

Back 49

After activation, execute the symsnap list command

Front 50

With which Open Replicator action can donor update be used?

Back 50

HOT PULLLL

Front 51

Which lock would be acquired when setting the dynamic RDF device attribute (DRX) on a Symmetrix VMAX?

Back 51

Front-end device lock

Front 52

. In which way does FAST and FAST VP move data?

Back 52

FAST swaps or moves device extents between tiers.
FAST VP swaps device extents from one tier to another.

Front 53

A customer wants to concurrently establish two RAID 1 BCVs with a STD RAID 1 device in a Symmetrix VMAX array. How many mirror positions will remain for the STD device in this configuration?

Back 53

3

Front 54

A customer has attempted to redeploy existing TDEVs on a Symmetrix VMAX. As part of the decommissioning process, the devices have been removed from the storage group for the original host. When the customer tries to create the stripped meta device, the script fails.

What would cause the script to fail?

Back 54

Devices are still mapped to the FA ports

Front 55

What is the effect of using the “-nop” option when scripting SYMCLI commands?

Back 55

Confirmation questions to the command screen are suppressed

Front 56

A customer has decided to implement Virtual Provisioning for a set of web application servers. They require approximately 10 TB of pool capacity.

What is the most efficient way to configure the pool resources?

Back 56

Two pools with one hundred 50 GB data devices in each

Front 57

The SYMAPI_USE_GNS option has been enabled on the host to store SYMAPI device group and composite group definitions in a common repository. Which conditions must be fulfilled to make the host capable of using this repository?

Back 57

XXXX Locally attached and a running GNS daemon

Front 58

A Symmetrix VMAX administrator has created 300 GB of data devices and added them to a thin pool. The administrator wants to ensure that the pool does not run out of space when thin devices are added to the pool.

What is the solution?

Back 58

Set the pool subscription limit to 100%

Front 59

59. A Symmetrix Management Console user must have the ability to perform configuration and replication tasks on their Symmetrix array. The user should not be able to create user accounts or modify user permissions.

Which role should be assigned to this user?

Back 59

StorageAdmin

Front 60

What is the earliest version of EMC Ionix ControlCenter that supports native IPv6 functionality?

Back 60

6.1

Front 61

Refer to the Graphic.

Which delta set will be discarded as a result of a Multi-Session Consistency (MSC) cleanup?

Back 61

Receive delta set in the bottom-right Symmetrix

Front 62

What is the EMC recommended maximum number of Symmetrix arrays that may be managed with one Symmetrix Management Console server?

Back 62

10

Front 63

Refer to the Graphic.

Server A and Server B are running two different applications on SRDF R1 devices on the source Symmetrix. All R1 devices belong to the same RDF group. Both applications are replicated with SRDF/S. A disaster has occurred at the source site.

Which step is needed to restart the applications at the remote site?

Back 63

Execute SRDF failover for all devices in the RDF group