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Cloud+ Outline - Module 2

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By: cdoyle

April 14, 2017

cloud-3Module 2: Storage Device Configuration Part 1Unit Overview Storage Types and Configuration
  • Tiering
  • Redundant Array of Independent DIsks (RAID)
  • File System Types
Disk Types and ConfigurationsRemovable Media - 1
  • Interface Type
  • Access Speed
  • Solid-State Drive (SSD)
  • USB Drive
  • Tape
 Removable Media - 2
  • Disks
  • Floppy Disk
  • USB drive
  • Can be fixed or removable
 Interface Types
  • Advanced technology attachment (ATA)
  • Integrated device electronics (IDE)
  • Serial ATA (SATA)
  • Serial attached SCSI (SAS)
  • Small computer system interface (SCSI)
Access Speed
  • Hard Disk Speed
  • Latency (the higher the speed, the worse it is for network)
  • Access Time
Solid-State Drive (SSD)
  • Contains no moving parts
  • High-performance storage device
USB Drive
  • Plug and play removable storage
  • Assigned a drive letter on Windows OS
  • Powered by the USB port if small
  • Requires an external power supply for larger hard drives
  • Best for temporary transfer and storage
  • Requires a device to read the magnetic tape
  • Used primarily for backup data
  • Primarily a means of keeping monthly or yearly full backups
  • Slow seek time
  • Used for off-site storage
 TieringPerformance Levels of Each TierPolicies Performance Levels of Each TierTier 1 – Mission CriticalPerformance capacity, reliability and manageabilityTier 2 – Major business applicationsNeeds to be reasonable fastTier 3 – Financial DataNot accessed often, inexpensiveTier 4 – Stores e-mails or data for long periodsLarge amounts of data, can be slower than the others Policies
  • Used for fitting data in each tier
  • Policy to migrate between tiers
  • Provide guidelines to manage the organization’s data
  • Service License Agreement (SLA)
 Module 2: Storage Device Configuration Part 2Redundant Array of Independent Disks (RAID)RAID 0, 1, 0+1, 1+0 or 10, 5, 6 RAID 0Striped – each drives max storage, no fault tolerance, performance only.A1 A2 (½ application on A1, the other half on A2)A3 A4 RAID 1Mirrored – each drive is mirrored, ½ amount of storageA1 A1A2 A2 RAID 0+1Stripe, then mirror Reliability and performanceA1 A2 A1 A1 RAID 1+0Mirror, then stripeA1 A1 A1 A1 RAID 5Block-level striping with distributed parity(i.e. 100 Gb split 4 ways, but last 25 Gb used for parity)A1 A2 A3 ApB1 B2 Bp B3C1 Cp C2 C3Dp D1 D2 D3Lose one hard drive and keep going RAID 6Block-level striping with distributed parity AND an additional parity blockA1 A2 A3 Ap AqB1 B2 Bp Bq B3C1 Cp Cq C2 C3Dp Dq D1 D2 D3Lose two hard drives and keep going File System Types
  1. Byte Sizes
  2. UNIX File System
  3. New Technology File System
  4. File Allocation Table
  5. Virtual Machine File System
  6. Z File System
  7. Extended File System
Byte Sizes
  • 1024kB kilobyte
  • 1024MB megabyte
  • 1024GB gigabyte
  • 1024TB Terabyte
  • 1024PB petabyte
  • 1024EB exabyte
  • 1024ZB zettabyte
  • 1024YB yottabyte
Unix File System
  • Primary file system for UNIX-based OS
  • Uses a hierarchical file structure
  • Top level is called the root (/)
  • Max volume: 1 YB
    • Max Files Size 32 PB
    • No Encryption
New Technology File System
  • Created by Microsoft
  • Supports features such as
  • Compression
    • Volume Shadow Copy Service (VSS)
    • Encrypting File System (EFS)
    • Quotes
      • Max Volume: 256 TB
      • Max Files Size: 16 TB
      • Yes Encryption
File Allocation Table (FAT)
  • Legacy Files system
    • Used primary by removable media
    • Does not support feature for permissions and encryption
      • Max Volume: 2TB
      • Max File Size: 4GB
      • No Encryption
Virtual Machine File System (VMFS)
  • Used with VMWare ESX server and Vsphere
  • Storage disk images and snapshots in a file
  • Allows servers to read and write simultaneously
  • Max Volume: 64 TB
  • Max Files Size: 2TB
  • No Encryption
Z File System
  • Created by Sun Microsystems
  • File system and logical volume manager
  • Protects against data corruption
  • Supports high-storage capacities
  • Max volume 16 EB, Max files size 16 EB, no Encryption
Extended File System (EXT)
  • First file system created specifically for Linux
  • Bawesd for UNIX File System
  • Default file system for most Linux Distribution
  • EXT2, EXT3, EXT4
  • Max Volume: 1 YB, Max Files Size: 32 PB, No Encryption
Summary OverviewDescribed Storage Types and ConfigurationsDescribed TieringDescribed Redundant Array of Independent Disks (RAID)Described File System Types
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