Storage Fundamentals

Lesson 1: History and Philosophy of Unix Introduction :   Unix Distribution: HP-UX , IRIX, BSD, AIX, Solaris 2002 - Apple Releases OS X, Based on BSD Unix (NeXTSTEP) Linux is  Most Successful Unix Derived OS Linux Is very Successful as a Server OS - LAMP (Linux, Apache, MySQL, PHP) is a standard for web services development. Linux is the basis for cellphone and tablet OS android Unix/Linux OSes are majorly used in Server market and very less in Desktop PC market. Commercial Unix Vendors and System Include:  Oracle - Solaris IBM - AIX HP- HP-UX Basic Principle of UNIX:  Modularity - Summing of small component, each one doing own task and coming together to create a whole system. (Also called as Composability) Portability - Can be easily embed into any hardware as i was developed in 'C' Simplicity - Unix programs should do one thing, do it well, and be simple for other programmers to understand Unix and the open Source Model: ...

SNMP Manager   The SNMP Manager communicates to the devices within a network using the SNMP protocol. Typically, SNMP Managers manage networks by monitoring the network parameters and optionally setting parameters in managed devices.  SNMP Agent   The SNMP agent resides in the managed devices in the network and collects data from these devices. The SNMP Agent stores the data and sends these when polled by an SNMP Manager. The agent can also automatically alert the SNMP Manager about events by using specially configured triggers called traps.  Management Information Base   SNMP Agents in the managed devices store the data about those devices in a database called a Management Information Base (MIB).  The MIB lets the SNMP manager know what each value the device returns means. The MIB structure determines the scope of management access allowed by a device.   Basic SNMP operation Every Brocade device carries an agent and management informati...

First you need to install SnapDrive utility from Netapp support Page on the server for which you are creating and managing the LUN. Go to Server Manager -> Storage -> SnapDrive -> iSCSI Management -> Establish Session This wizard will guide you through creating an iSCSI session between a host system initiator  and The storage System. 1. Establishing Session Wizard. 2. Add the IP address of the Vfiler/SVM you wanting to connect to 3.From the top section Select the IP address of your dedicated iscsi connection on your virtual machine, This should be on same network as your storage vfiler or SVM. 4. 5.Summary  6. Confirmation Now we will need to create disk i.e Lun by clicking " Disks " at the left menu and click on C reate Disk. 1. 2. Select your SVM or VFiler or type IP address of the same and click on Add, Select the volume on which you want to create LUN , And type the Lun Name and description 3. LUN T...

Security Styles : What is Security Style ? Security style determines the type of permission ONTAP uses to control data access and what client type can modify these permission. Security Styles can be set at the volume and Qtree level Qtrees by default inherit the Security style of the containing volume  Infinite Volumes can have  only Unified Security style, You cannot change it There are four type of security styles: Unix  Choose if .... The file system is managed by a UNIX administrator. The majority of users are NFS clients. An application accessing the data uses a UNIX user as the service account. NTFS The file system is managed by a Windows administrator. The majority of users are SMB clients. An application accessing the data uses a Windows user as the service account. MIXED The file system is managed by both UNIX and Windows administrators and users consist of both NFS and SMB clients. If Security Style is set to UNI...

FAS Series 2500 Include : 1.   2520 2 controllers in same chassis 2 Redudant power supply 12 Internal drives -> Extend up-to 84 drives Two 6Gb SAS Ports for storage expansion 2 .  2552 Same as 2520 but also added UTA2 Port 3.  2554 24 Internal Disks -> Extend up-to 144 4 redundant power supply FAS Series 8000 Include :

The current Model are SAS (Serial Attached SCSI) disk shelves. Meaning the controller connects to the shelf via SAS Port and Cables. Netapp Offers 3 Types of Disks: SAS SSD ------------------------------- (High Cost, High Performance) SATA HDD-------------------------------(High Capacity, Low Performance , Low Cost) SAS HDD------------------------------(Balanced performance and cost per GB) All three types of disk fits in SAS disk shelves. For more information you can visit : netapp support -> products -> disk shelves and Disks

Overcoming the scalability of 7-mode would have required a complete rewrite of the 7-mode software architecture. Clustered data ONTAP Evolved from a acquisition of spinnaker network in 2003. Clustered Data ONTAP Architecture : The architecture is same as  7-Mode except you can add multiple HA pairs to cluster in order to scale-up your storage system. This scaling is done by the the switch called " Cluster Interconnect switch " as shown in above figure. Unlike 7 mode, Data can travel trough other nodes as well with the help of cluster interconnect switch. Advantages over 7-mode : Can Store up to 138PB of Data In NAS supported Cluster can be scaled up to 24 Nodes  In SAN supported cluster, It can be scaled up to 8 nodes Performance is shared among all the nodes  Load balancing improved  Disk, shelves and nodes can be added non-disruptively

What is a controller? Controller is the brain of the system, it’s where the CPU, memories and operating system resides. ·           What kind of connection is there in between Controller and Disk shelves? Daisy Chained ·           What is Multipath HA? If first connection between the controller and the disk shelve lost then we can have a MHA connection which is the second connection to the disk shelve from controller. ·           Keep alive cable or HA cable? Two controllers get to know if any of the controllers gets inactive by using keep alive signals on HA cable. What happens in case of controller failures? In 7 mode we don’t get active-active load balancing for the same set of data.

7-Mode is made up of two controllers that is also called HA Pair (High availability Pairs) Controller : Controller (also referred to as Node) is the brain of Storage System where Operating System (Data ONTAP  Resides) and which deals with Read and Write operations. And it also contain memory, CPU. Disk Shelve: Disk Shelves are connected to the Controller in Daisy-Chained format, Disk shelve contain the actual physical disk on which your data resides. HA cable : The cable which connected two controller is called HA cable which is used for sending Keep alive signal between controllers which is used for Fail-over purpose that we will discussed later. 7 Mode Scalability Limitations: ·          You can have maximum 2 FAS Controllers ·          Disks owned by controller 1 can be accessed by controller 1 only ·          Data can be moved amon...