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Storage Management:

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ApplicationsGenerates DataStorage Management1. Data Storage

Storage Management:1. Types of Data Storage

Centralized StorageLocal StorageData storage and configuration storage for Network connected devicesProvided on client machines for OS, Applications and services

Storage Management:1. Data Storage Concepts:

Storage DevicesFile systemsDistributed File Systems (DFS)

Networked Storage

Storage Management:Storage Devices

Primarily Hard drives are used,Hard drives are non-volatile storage of data, i-e. it retains data even if power is removed.

Solid State DriveNew technology: (Solid State Drive)Uses non moving storage,Cost per gigabyte is high,Therefore rarely use server storage solutions,But growing in popularity for client computers.

Storage Management:Storage Device selection parameters:Storage CapacityRead and write speedDrive types supported by drive systemDrive bays or drive connections system provides

File System:Storage Management:File-system: defines the method used to store and retrieve data using storage devices and the file access method used.Purpose of File System:FAT / NTFSDefine structure for storing data on the storage unit,Method for referencing location of data on storage unit,Constraints on factors such as file sizes, number of files and file names.File System in Windows:File Allocation Table (FAT) file-systemNT File System (NTFS)

File Allocation Table (FAT) file-system:Storage Management:Older method of file system,It is a simple file systemCommonly used on removable drives todayNT File System (NTFS):Was originally created for Windows NT,It is a complex file system,Offers advanced features including security,*Sparse files are supported.*Asparse fileis a type of computerfilethat attempts to usefilesystem space more efficiently when thefileitself is mostly empty.

Storage Management:FAT/FAT32 v/s NTFS:FAT/FAT32NTFSMaximum volume size of 2TB with FAT32 or 4 GB with FAT16Maximum volume size of 256 TB with a 64KB cluster sizeMaximum file size of 4 GBMaximum file size of approx. 16 TBUp to 4.2 million files per volumeUp to 4.3 billion files per volumeFile attributes provide limited securityNTFS permissions provide advanced securityNo sparse file supportSparse files are supportedNo inherent support for encryptionBuilt-in data encryption support using Encrypting File System (EFS)

Storage Management:Networked Storage:Built-in computer storage may be insufficient for multiple users using multiple applications,Using Networked Storage, users can store their data on networked hard drives,Network hard drives are managed by networked servers such as Windows Server 2008 R2.

Networked Storage implementations:Network-Attached Storage (NAS)Storage Area Network (SAN)