Interview Questions.

Question 1. What Are The Major Components Of Symmetrix Vmax?

Answer :

System Bay: 

VMAX Engines 
Matrix Interface Board Enclosure (MIBE) 
Power subsystem additives 
Standby energy substances (SPS) 
Service Processor (server, keyboard/video/mouse, UPS). 
VMAX Engine: 

Symmetrix VMAX systems offer up to 8 VMAX Engines inside a gadget bay on preferred configurations and as much as 4 VMAX Engines on prolonged force loop configurations. Each VMAX Engine consists of: 

Two administrators that assist the front-stop, again-quit and SRDF connections. Each director has:

16, 32, or sixty four GB of bodily memory 
One System Interface board (SIB) that connects the director and the Matrix Interface Board Enclosure (MIBE) 
Two Back End I/O Modules (2 ports, 4 Gb/s) that connect to storage bay drives. 
Two I/ O Module carriers that provide connectivity among each director and the the front-cease I/O ports. Front End 
I/O Modules aid: 

Fibre Channel host connectivity (four ports, 2, 4, or eight Gb/s) 
Fibre Channel SRDF connectivity (2 ports, 2, four, eight Gb/s) 
FICON host connectivity (2 ports, 2, four, or eight Gb/s) 
iSCSI host connectivity (2 ports, 1 Gb/s) 
GigE SRDF connectivity. 
Two Management Modules that provide environmental monitoring 
Two VMAX engine energy resources 
Four cooling lovers. 
Storage Bay: 

Disk array enclosures (DAEs) 
Power subsystem: PDPs, PDUs, AC connectors 
Standby strength supply unit (SPS) 
Disk array enclosures (DAEs) 
Each disk array enclosure consists of: 

Two redundant disk array enclosure strength /cooling lovers 
Two link manage card (LCC) modules 
From five to 15 drives in step with direct-attach enclosure 
From four to 15 drives in step with daisy-chain enclosure.
Question 2. What Are The Features Of Vmax Se?

Answer :

Supported Disks: forty eight to 360 disks 

Single V-Max Engine— administrators.

FICON, Fibre Channel, iSCSI, Gigabit Ethernet connectivity.

Up to 128 GB international reminiscence.

Networking Interview Questions
Question three. What Are Features Of V-max?

Answer :

ninety six to 2,four hundred disks, up to 2 PB—3 times extra usable potential.
One to eight V-Max Engines (16 administrators). 
Up to at least one TB (512 GB usable) international reflected reminiscence.
Twice the host ports—Fibre Channel, iSCSI, Gigabit Ethernet, FICON connectivity (as much as 128 ports*). 
Twice the lower back-stop connections for Flash, Fibre Channel, and SATA drives (up to 128 ports). 
Quad-center 2.Three GHz processors to provide greater than twice the IOPS.
Virtual Matrix structure connects and shares resources throughout director pairs, imparting huge scalability.
Question four. What Are The Management Tools For Symmetrix Vmax?

Answer :

Symmetrix Management Console: 

The number one interface for dealing with Symmetrix arrays. 

EMC z/OS Storage Manager (EzSM): 

An Interactive System Productivity Facility (ISPF) interface that manages Symmetrix system arrays in mainframe environments. 

EMC Control Center: 

An intuitive, browser-based totally family of merchandise that provides management of the overall garage surroundings, along with multi vendor garage reporting, tracking, configuration, and manipulate. 

EMC Solutions Enabler SYMCLI: 

A library of instructions which are entered from a command line or from a script. 

EMC SMI-S Provider: 

An SMI-compliant interface for EMC Symmetrix and CLARiiON arrays.

Networking Tutorial
Question five. What Are The Supported Disk Drive Types In Vmax?

Answer :

Symmetrix VMAX systems aid Flash, Fibre Channel, and SATA II drives.

Data Center Management Interview Questions
Question 6. What Are The Features Of Enginuity 5874?

Answer :

Auto-provisioning Groups: 

Simplifies provisioning of configurations with a huge wide variety of hosts via allowing the creation of initiator, port and garage organizations. Auto-provisioning Groups is mainly useful in large, virtualized server environments that require the provision of many volumes to many host initiators and lots of garage ports. 

Dynamic configuration adjustments: 

Allows the dynamic configuration of BCV and SRDF tool attributes. Decreases impact to hosts for the duration of BCV and SRDF set and clean operations. 

Concurrent configuration modifications:

Provides the capability run scripts concurrently instead of serially. 

New Management Integration:

New Management Integration functions free up host assets and simplify Symmetrix device management via allowing you to:

Load Symmetrix Management Console on the Service Processor.
Attach the Service Processor in your network. 
Open a browser window from any server within the community. 
Manage the Symmetrix machine from anywhere in your employer. 
SRDF Features:

SRDF Extended Distance Protection (SRDF/EDP), Add and dispose of dynamic gadgets to SRDF/A (consistency exempt), Two-mirror SRDF Enginuity Consistency Assist (ECA), SRDF/Star with R22 tool safety, 250 SRDF institution assist ,and so forth.. 

Tiered storage optimization:

Fully Automated Storage Tiering (FAST) — Reduces price for performance, saves strength, and simplifies garage tier management with the aid of permitting the dynamic allocation of facts across storage levels, primarily based on user described regulations and at the converting overall performance requirements of the applications. 

Enhanced Virtual LUN technology: 

Provides the potential to non disruptively change disk and protection form of a logical volume, and lets in the migration of open structures, mainframe, and IBM i volumes to unallocated garage, or to present quantity.

Virtual Provisioning: 

Simplifies garage control: 

Improves capability usage by means of permitting the allocation of more storage to than is physically consumed by using a host at onset, and is allocated, as needed, from a shared pool. 

Automates pool re balancing: 

Allows users to nondisruptively stability workloads and extend skinny pool capacity, in small increments if required, while maximizing overall performance and lowering general value of possession.

Question 7. Can We Run The Concurrent Configuration Change Sessions On Vmx?

Answer :

Yes, each consultation holds the one-of-a-kind configuration trade locks.

IBM Mainframe Tutorial IBM Mainframe Interview Questions
Question eight. How Many Configuration Change Sessions We Can Run Concurrently On Vmax?

Answer :

Up to 4 concurrent configuration alternate sessions are allowed to run at the identical time, whilst they're non-conflicting. This approach that a couple of parallel configuration alternate sessions can run on the equal time as long as the modifications do now not include any conflicts on Device returned-give up port, Device front-stop port and on Device.

Question 9. How Do You List The Reserved Devices?

Answer :

Symconfigure -sid "SymID" listing -reserved.

Netapps Interview Questions
Question 10. What Are The Advantages Of Auto-provisioning Groups?

Answer :

Eliminates of trying to find required storage on arrays.
Eliminates the mapping and covering devices which requires separate obligations for every initiator/port mixtures. 
Eliminates the host interruptions. 
Eliminates the garage reclamation.
Initiators may be dynamically introduced or removed from initiator groups. 
Ports may be dynamically delivered or eliminated from port groups.
Storage may be dynamically brought or removed from storage agencies.
Question 11. What Are The Different Types Of Ports Can Be A Member Of Initiator Group?

Answer :

Only Fibre and Gig-E ports on the front quit administrators allowed.

EMC Interview Questions
Question 12. What Are The Restrictions Of Initiator Group?

Answer :

Initiator can belongs to simplest one Initiator Group.
Maximum of 32 Initiators incorporates one initiator institution. 
Initiator businesses can be cascaded.
Networking Interview Questions
Question thirteen. What Are The Steps To Replace A Faulty Hba?

Answer :

Find out and Note down the old HBA WWN
Symaccess listing logins
Swap out the vintage HBA card with new HBA 
Discover the brand new HBA and note down the WWN 
Symaccess find out hba or symaccess listing hba 
Replace the WWN 
Symaccess -sid "SymID" replace -wwnn "vintage WWN" -new_wwn "information WWN" 
Establish the brand new alias for the HBA 
Symaccess discover hba -rename
Question 14. What Are The Advantages Of Thin Provisioning?

Answer :

Reduce the amount of allocated however unused physical storage. 
Avoid over allocation of physical storage to programs.
Reduces energy intake and footprint. 
Provision independently of physical storage infrastructure. 
Minimize the demanding situations of growth and expansion. 
Simplifies facts layout. 
Saves prices by way of simplifying tactics to add new storage. 
Reduces disk contention and enhances overall performance. 
Maximize go back on funding.
Avoided the application interruptions/host downtime.
Question 15. Can You Explain Step By Step Procedure To Implement Virtual/thin Provisioning?

Answer :

Creating Data Devices: 

Symconfigure -sid "SymID" -cmd "create dev rely=sixteen, config=2-Way-Mir, attribute=datadev, emulation=FBA, length=4602;" dedicate -v -nop 

Creating Thin Pool: 

symconfigure -sid "SymID" -cmd "create pool PoolName type=skinny;" commit -nop 

Adding Data Devices to skinny pool: 

Symconfigure -sid "SymID" -cmd "add dev 10E4:10E5 to pool PoolName kind=skinny, member_state=ENABLE;" devote -nop 

Creating Thin Devices: 

symconfigure -sid "SymID" -cmd "create dev count=sixteen, size=4602, emulation=fba, config=TDEV;" commit -nop 

Binding Thin devices to Thin Pool: 

symconfigure -sid "SymID" -cmd "bind tdev 10F4:10F7 to pool PoolName;" dedicate -nop

Storage Area Network Interview Questions
Question sixteen. How Many Thin Pools Can We Create In An Array?

Answer :

The number of pools that can be configured in a Symmetrix array is 512. 

This is the entire number of swimming pools, consisting of Virtual Provisioning skinny v swimming pools, SRDF/A Delta Set Extension (DSE) swimming pools, or Time Finder/Snap swimming pools.

Question 17. Maximum No. Of Data Devices In A Thin Pool?

Answer :

As many as information devices can be member of a skinny pool, however the restriction to the wide variety of skinny and facts devices that can be configured inside a Symmetrix device is sixty four,000.

Mainframe DB2 Interview Questions
Question 18. What Are The Thin Pools Recommendations When You Are Adding Data Devices?

Answer :

Only statistics devices may be positioned in a skinny pool. 
The facts gadgets have to all have the same emulation. 
The data gadgets should all have the equal protection type. 
It is recommended that information gadgets in a pool all live on drives that have the same rotational velocity. 
The information devices in the pool have to generally be spread across as many DAs and drives of a given pace as possible. 
The gadgets have to be calmly unfold throughout the DAs and drives. 
The huge striping furnished with the aid of Virtual Provisioning will spread thin devices frivolously throughout the statistics gadgets. The storage administrator ought to ensure that the information gadgets are lightly unfold across the again give up. 
It is recommended that each one facts devices in a pool are of the same length. Using distinct size devices ought to bring about uneven facts distribution. 
The records tool sizes need to be as big as viable to reduce the range of devices required to embody the desired average pool potential.
Data Center Management Interview Questions
Question 19. What Are The Vmax Storage Optimization Features?

Answer :

Dynamic Cache Partitioning: 

Allows the allocation of portions of cache to unique tool organizations.

Symmetrix Priority Controls: 

Allows the prioritization of study I/O and SRDF/S transfers by means of host packages. 

Symmetrix Optimizer: 

Optimizes performance via tracking get admission to styles on garage arrays and transparently moving records among garage stages. 

Virtual LUN: 

Allows the movement of records between garage degrees. 

Fully Automated Storage Tiering (FAST): 

gives sophisticated heritage algorithms that could automate the allocation and relocation of records throughout storage levels based at the converting overall performance of packages. 

Storage provisioning with symaccess allows you to create a group of devices, a collection of director ports, a set of host initiators, and with one command, companion them in what is referred to as a covering view. Once a protecting view exists, gadgets, ports, and initiators may be easily delivered or eliminated from their respective corporations.

Question 20. Can You Explain The Step By Step Procedure For Creating Auto Provisioning Groups?

Answer :

The steps for developing a masking view are: 

Search the environment for Symmetrix gadgets on every HBA 
Symaccess find out hba
Create a storage institution (one or greater devices) 
Symaccess -sid XXXX create -call StorageGroupName -kind garage devs 3250:3350 
Create a port organization (one or more director/port mixtures) 
Symaccess -sid XXXX create -call PortGroupName -kind port -dirport 7E:zero,7G:1,8F:zero 
Create an initiator group (one or extra host WWNs or iSCSIs) 
symaccess -sid XXXX create -name InitiatorGroupName -kind initiator -wwn wwn 
Create a protecting view containing the garage group, port organization, and initiator group. 
When a masking view is created, the gadgets are automatically masked and mapped. 
Symaccess -sid XXXX create view -call MaskingViewName -sg StorageGroupName -pg PortGroupName -ig InitiatorGroupName.
Data center infrastructure control (DCIM) Interview Questions
Question 21. What Is Purpose Fast (absolutely Automated Storage Tiering)?

Answer :

FAST is Symmetrix software program that runs background algorithms constantly examine the usage (busy charge) of the Symmetrix array gadgets. 

FAST can move the maximum-used records to the fastest storage, which include Enterprise Flash Drives, the least-used statistics to the slowest storage, such as SATA drives, while preserving the closing facts on Fibre Channel drives, primarily based on person-described Symmetrix degrees and FAST guidelines. 

The objective of tiered storage is to minimize the fee of garage through placing the right facts, on the proper Symmetrix tier, on the right time.

Question 22. How Do You Configure The Symmetrix Array For Fast?

Answer :

By defining symmetrix levels 
By defining FAST Policies 
By defining storage groups