RAID And Storage Arrays      Chris Pierce
Definitions:Array - a systematic arrangement of objects.RAID - Redundant Array of Independent DisksIn plain english please?...
Types of RAID:RAID 0 - Striped Disks                                Disk 1   Disk 2   Data is thrown across both          ...
Types of RAID:RAID 0 - Striped Disks                                Disk 1   Disk 2   Data is thrown across both          ...
Types of RAID:RAID 0 - Striped Disks                                Disk 1   Disk 2   Data is thrown across both          ...
Types of RAID:RAID 1 - Mirroring Disks                                                  Data is replicated across         ...
Types of RAID:RAID 1 - Mirroring Disks                                                  Data is replicated across         ...
Types of RAID:RAID 1 - Mirroring Disks                                                  Data is replicated across         ...
Types of RAID:RAID 1 - Mirroring Disks                                                  Data is replicated across         ...
Types of RAID:RAID 5 - Striped Parity                                            Disk 1   Disk 2   Disk 3    Data “A”     ...
Types of RAID:RAID 5 - Striped Parity                                 Disk 1   Disk 2   Disk 3  Data “A”     RAID Controll...
Types of RAID:RAID 5 - Striped Parity                                 Disk 1   Disk 2   Disk 3  Data “A”     RAID Controll...
Types of RAID:RAID 5 - Striped Parity (Cont.)                                            Disk 1   Disk 2   Disk 3     0100...
Types of RAID:RAID 5 - Striped Parity (Cont.)                                            Disk 1   Disk 2   Disk 3     0100...
Types of RAID:RAID 5 - Striped Parity (Cont.)                                            Disk 1   Disk 2   Disk 3     0100...
Types of RAID:RAID 5 - Striped Parity (Cont.)                                            Disk 1   Disk 2   Disk 3     0100...
Types of RAID:RAID 5 - Striped Parity (Cont.)                                            Disk 1   Disk 2   Disk 3     0100...
Other RAID Configurations:Don’t be confused by RAID 50, RAID 10, RAID 51, orother High Number RAID Configurations.RAID 50 = ...
What RAID is NOT!RAID is NOT data backup - Data can stillbecome damaged in a RAID array.RAID is NOT immune to viruses and ...
What RAID is NOT!RAID is NOT data backup - Data can stillbecome damaged in a RAID array.RAID is NOT immune to viruses and ...
Questions?cpierce@csdurant.comwww.twitter.com/cpiercecs
Raid 091113193838-phpapp01
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  • \n
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  • Raid was first Redundant Array of Inexpensive Disk. There are several types of RAID and I’ll cover 3 main types with the time I have.\n
  • RAID 0 isn’t really RAID because it lacks the “R”edundancy\nRAID 0 requires a minimum of 2 disks.\nRAID 0 space is the size of both disk combined together (Example: 2x160GB HDD = 320GB)\n
  • RAID 0 isn’t really RAID because it lacks the “R”edundancy\nRAID 0 requires a minimum of 2 disks.\nRAID 0 space is the size of both disk combined together (Example: 2x160GB HDD = 320GB)\n
  • RAID 0 isn’t really RAID because it lacks the “R”edundancy\nRAID 0 requires a minimum of 2 disks.\nRAID 0 space is the size of both disk combined together (Example: 2x160GB HDD = 320GB)\n
  • RAID 1 allows for redundancy of data.\nRAID 1 requires a minimum of 2 disks.\nRAID 1 space is the size of the smallest disk (Example 2 160GB HDD’s = 160GB)\n
  • RAID 1 allows for redundancy of data.\nRAID 1 requires a minimum of 2 disks.\nRAID 1 space is the size of the smallest disk (Example 2 160GB HDD’s = 160GB)\n
  • RAID 1 allows for redundancy of data.\nRAID 1 requires a minimum of 2 disks.\nRAID 1 space is the size of the smallest disk (Example 2 160GB HDD’s = 160GB)\n
  • RAID 5 allows for redundancy of data with performance increase.\nRAID 5 requires a minimum of 3 disks.\nRAID 5 space is the size of the number of disk minus 1 (n-1) (Example 3 160 HDD’s=320GB)\n
  • RAID 5 allows for redundancy of data with performance increase.\nRAID 5 requires a minimum of 3 disks.\nRAID 5 space is the size of the number of disk minus 1 (n-1) (Example 3 160 HDD’s=320GB)\n
  • RAID 5 allows for redundancy of data with performance increase.\nRAID 5 requires a minimum of 3 disks.\nRAID 5 space is the size of the number of disk minus 1 (n-1) (Example 3 160 HDD’s=320GB)\n
  • RAID 5 can Self Heal with the addition of a HOT SPARE Disk.\n
  • RAID 5 can Self Heal with the addition of a HOT SPARE Disk.\n
  • RAID 5 can Self Heal with the addition of a HOT SPARE Disk.\n
  • RAID 5 can Self Heal with the addition of a HOT SPARE Disk.\n
  • Raid 50 and other are just a lazy way of writing it without the “+” sign.\n
  • \n
  • Thank You!\n
  • Raid 091113193838-phpapp01

    1. 1. RAID And Storage Arrays Chris Pierce
    2. 2. Definitions:Array - a systematic arrangement of objects.RAID - Redundant Array of Independent DisksIn plain english please?RAID is an umbrella term used for any method thatdivides or replicates data across multiple hard diskdrives.
    3. 3. Types of RAID:RAID 0 - Striped Disks Disk 1 Disk 2 Data is thrown across both disks allowing for increased Data “A” RAID Controller performance but with the A1 A2 cost of 0 redundancy. A3 A4 A5 A6
    4. 4. Types of RAID:RAID 0 - Striped Disks Disk 1 Disk 2 Data is thrown across both disks allowing for increased Data “A” RAID Controller performance but with the A1 A2 cost of 0 redundancy. A3 A4 A5 A6
    5. 5. Types of RAID:RAID 0 - Striped Disks Disk 1 Disk 2 Data is thrown across both disks allowing for increased Data “A” RAID Controller performance but with the A2 cost of 0 redundancy. A4 A6
    6. 6. Types of RAID:RAID 1 - Mirroring Disks Data is replicated across Disk 1 Disk 2 both disks allowing for Data “A” RAID Controller increased redundancy with A1 A1 a only a small performance cost. A2 A2 A3 A3
    7. 7. Types of RAID:RAID 1 - Mirroring Disks Data is replicated across Disk 1 Disk 2 both disks allowing for Data “A” RAID Controller increased redundancy with A1 A1 a only a small performance cost. A2 A2 A3 A3
    8. 8. Types of RAID:RAID 1 - Mirroring Disks Data is replicated across Disk 1 Disk 2 both disks allowing for Data “A” RAID Controller increased redundancy with A1 A1 a only a small performance cost. A2 A2 A3 A3
    9. 9. Types of RAID:RAID 1 - Mirroring Disks Data is replicated across Disk 1 Disk 2 both disks allowing for Data “A” RAID Controller increased redundancy with A1 A1 a only a small performance cost. A2 A2 A3 A3
    10. 10. Types of RAID:RAID 5 - Striped Parity Disk 1 Disk 2 Disk 3 Data “A” RAID Controller A1 A2 P1Data is striped across P2 A3 A4multiple disks and a paritybit is written for redundancy. A5 P3 A6
    11. 11. Types of RAID:RAID 5 - Striped Parity Disk 1 Disk 2 Disk 3 Data “A” RAID Controller A1 A2 P1 P2 A3 A4 A5 P3 A6
    12. 12. Types of RAID:RAID 5 - Striped Parity Disk 1 Disk 2 Disk 3 Data “A” RAID Controller A1 A2 P1 P2 A3 A4 A5 P3 A6
    13. 13. Types of RAID:RAID 5 - Striped Parity (Cont.) Disk 1 Disk 2 Disk 3 010011 RAID ControllerParity is checked across thearray. If the data written isadded to be even then theparity bit is 0. If the datawritten is odd, the parity bitis set to 1
    14. 14. Types of RAID:RAID 5 - Striped Parity (Cont.) Disk 1 Disk 2 Disk 3 010011 RAID Controller 0 1Parity is checked across thearray. If the data written isadded to be even then the 0 0parity bit is 0. If the datawritten is odd, the parity bitis set to 1 1 1
    15. 15. Types of RAID:RAID 5 - Striped Parity (Cont.) Disk 1 Disk 2 Disk 3 010011 RAID Controller 0 1 1Parity is checked across thearray. If the data written isadded to be even then the 0 0 0parity bit is 0. If the datawritten is odd, the parity bitis set to 1 1 0 1
    16. 16. Types of RAID:RAID 5 - Striped Parity (Cont.) Disk 1 Disk 2 Disk 3 010011 RAID Controller 0 1 1Parity is checked across thearray. If the data written isadded to be even then the 0 0 0parity bit is 0. If the datawritten is odd, the parity bitis set to 1 1 0 1
    17. 17. Types of RAID:RAID 5 - Striped Parity (Cont.) Disk 1 Disk 2 Disk 3 010011 RAID Controller 0 1 1Parity is checked across thearray. If the data written isadded to be even then the 0 0 0parity bit is 0. If the datawritten is odd, the parity bitis set to 1 1 0 1
    18. 18. Other RAID Configurations:Don’t be confused by RAID 50, RAID 10, RAID 51, orother High Number RAID Configurations.RAID 50 = RAID 5 + RAID 0RAID 10 = RAID 1 + RAID 0RAID 51 = RAID 5 + RAID 1
    19. 19. What RAID is NOT!RAID is NOT data backup - Data can stillbecome damaged in a RAID array.RAID is NOT immune to viruses and otherdisasters that could potentially cause data loss.RAID is NOT an insecticide used to “Kill BugsDead” by SC Johnson Company.
    20. 20. What RAID is NOT!RAID is NOT data backup - Data can stillbecome damaged in a RAID array.RAID is NOT immune to viruses and otherdisasters that could potentially cause data loss.RAID is NOT an insecticide used to “Kill BugsDead” by SC Johnson Company.
    21. 21. Questions?cpierce@csdurant.comwww.twitter.com/cpiercecs
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