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What is RAID


               QsanTechnology.com
What is RAID?

   RAID (Redundant Array of Independent Disks)
   A storage technology that combines multiple disks
    into a single logical unit
   Divide and replicate data across multiple physical
    drives
Why use RAID?

Advantages
 data reliability

 I/O performance

 capacity



Disadvantages
 Cost!



Not meant as a replacement for backups
Hardware vs Software RAID

  Feature         Software RAID      Hardware RAID
On-board XOR           No                  Yes
off-load engine

    Cost              Low                  High

 Resources    Uses host system       Performed by the
               CPU/memory           controller hardware
Performance Depends on the server           High
            CPU / current loading
Hardware vs Software RAID

  Feature         Software RAID         Hardware RAID
On-board XOR           No                       Yes
off-load engine

    Cost              Low                       High

 Resources    Uses host system         Performed by the
               CPU/memory             controller hardware
Performance Depends on the server             High
            CPU / current loading
                            Qsan RAID systems
                            provide hardware
                                 RAID!!
RAID levels

   Ways of data distributed across the drives.
   Each distinct RAID configuration is given a number ,
    called a RAID “level”
   Redundancy and Performance depends on what RAID
    level it is.
RAID 0

   RAID 0 – Block-level striping and no redundancy (no
    parity)
   Best performance but no fault-tolerance.


                           Fault Tolerance   0 disk

                           Space             nX
RAID 0

   RAID 0 – Block-level striping and no redundancy (no
    parity)
   Best performance but no fault-tolerance.


                           Fault Tolerance    0 disk

                           Space              nX



                           All Qsan RAID systems
                               support RAID 0
RAID 1

   RAID 1 – data mirroring with no parity
   Best fault-tolerance


                            Fault Tolerance   n – 1 disks

                            Space             1X
RAID 1

   RAID 1 – data mirroring with no parity
   Best fault-tolerance


                            Fault Tolerance   n – 1 disks

                            Space             1X




                           All Qsan RAID systems
                               support RAID 1
RAID 5

   RAID 5 – Block-level striping with distributed
    (rotating) parity



                              Fault Tolerance   1 disk

                              Space             (n-1) X
RAID 5

   RAID 5 – Block-level striping with distributed
    (rotating) parity


                              Fault Tolerance 1 disk

                              Space             (n-1) X




                            All Qsan RAID systems
                                support RAID 5
RAID 6

   RAID 6 – Block-level striping with double distributed
    parity




                                  Fault Tolerance   2 disk

                                  Space             (n-2) X
RAID 6

   RAID 6 – Block-level striping with double distributed
    parity


                                 Fault             2 disk
                                 Tolerance
                                 Space             (n-2) X



                           All Qsan RAID systems
                               support RAID 6
RAID 0+1

   RAID 01 (0+1) – striped disk sets are mirrored




                                  Fault Tolerance   2 disk


                                  Space             The disk number in a
                                                    single RAID 0 set
RAID 0+1

   RAID 01 (0+1) – striped disk sets are mirrored
                                 Fault             2 disk
                                 Tolerance
                                 Space             The disk
                                                   number in a
                                                   single RAID 0
                                                   set



                           All Qsan RAID systems
                              support RAID 0+1
RAID 10

   RAID 10 – mirrored sets in a striped set




                                Fault Tolerance   2 disk

                                Space             The total RAID 1 set
                                                  number in the RAID
                                                  0 set
RAID 10

   RAID 10 – mirrored sets in a striped set
                                Fault              2 disk
                                Tolerance
                                Space              The total RAID
                                                   1 set number
                                                   in the RAID 0
                                                   set



                           All Qsan RAID systems
                               support RAID 10
RAID 50

   RAID 50 – RAID 5 set striped in RAID 0
RAID 50

   RAID 50 – RAID 5 set striped in RAID 0




                            All Qsan high-end
                           RAID systems support
                                 RAID 50
Qsan RAID Systems


Unified Storage     U600Q, U400Q
                    P600Q, P500Q, P400Q,
iSCSI SAN
                    P300Q, P110V04
Fiber Channel SAN   F600Q, F400Q, F300Q




                                           21
Qsan P Series

iSCSIPerformance & High Availability at Affordable Price
Enhanced
         IP SAN

High Availability                                    Value Add-on
 Dual active RAID controllers                        QiSOE (Qsan hardware iSCSI offload engine)
 Cache mirroring via high bandwidth channels         QThin (thin provisioning)
 Multi-path & load-balancing                         QReplica (remote replication)
 (MPIO, MC/S, Trunking, LACP)                         QSnap (copy-on-write snapshot)
 Fully redundant & hot pluggable design              BBM (battery backup module)
                                                        Performance




                                                Total Cost of Ownership

Flexible Volume for Multiple Applications            Green Storage Design
 Virtualization: VMware, Citrix, Hyper-V             Auto disk spin down
 For cloud storage, surveillance, backup &           Advanced cooling mechanism
Archive, video streaming, etc                         80 PLUS energy-efficient power supplies




                                                                                                    22
Qsan F Series

Fibre Channel SAN
Outstanding Performance, Reliability yet Cost-Effective


High Availability                                 Value Add-on
 Dual active RAID controllers                     QThin (thin provisioning)
 Cache mirroring via high bandwidth channels      QReplica (remote replication)
 Multi-path & load-balancing                      QSnap (copy-on-write snapshot)
 (MPIO, MC/S, Trunking, LACP)                      BBM (battery backup module)
 Fully redundant & hot pluggable design




Flexible Volume for Multiple Applications         Green Storage Design
 Virtualization: VMware, Citrix, Hyper-V          Auto disk spin down
 For video editing, video streaming, database,    Advanced cooling mechanism
backup, etc                                        80 PLUS energy-efficient power supplies
 Boot-from-SAN



                                                                                              23
Qsan Unified Storage




   Outstanding Performance         Advanced Protection
    o Hardware RAID                  o    Snapshot
    o SSD caching                    o    Volume clone
    o Qsan Unified OS                o    Battery Backup Module
                                     o    AntiVirus
   Integrated Backup Solution      Storage Efficiency
    o Amazon S3 Cloud backup         o    Thin Provisioning, DeDup, Compression
    o Remote Replication             o    UnifiedAUTH

                                                                             24
JBOD

   JBOD – Just a Bunch of Disks
   Each disk works as an independent disk in the array
Qsan JBOD


    J300Q



   The Qsan J300Q 6Gb SAS-to-SAS JBOD enclosure
    supports both SAS and SATA-II drives, providing high
    availability as well as cost advantages for small and
    medium business.

                                                            26
QsanTechnology.com
Sales@Qsan.com.tw


   Thank you very much!

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What is RAID (redundant array of independent disks)

  • 1. What is RAID QsanTechnology.com
  • 2. What is RAID?  RAID (Redundant Array of Independent Disks)  A storage technology that combines multiple disks into a single logical unit  Divide and replicate data across multiple physical drives
  • 3. Why use RAID? Advantages  data reliability  I/O performance  capacity Disadvantages  Cost! Not meant as a replacement for backups
  • 4. Hardware vs Software RAID Feature Software RAID Hardware RAID On-board XOR No Yes off-load engine Cost Low High Resources Uses host system Performed by the CPU/memory controller hardware Performance Depends on the server High CPU / current loading
  • 5. Hardware vs Software RAID Feature Software RAID Hardware RAID On-board XOR No Yes off-load engine Cost Low High Resources Uses host system Performed by the CPU/memory controller hardware Performance Depends on the server High CPU / current loading Qsan RAID systems provide hardware RAID!!
  • 6. RAID levels  Ways of data distributed across the drives.  Each distinct RAID configuration is given a number , called a RAID “level”  Redundancy and Performance depends on what RAID level it is.
  • 7. RAID 0  RAID 0 – Block-level striping and no redundancy (no parity)  Best performance but no fault-tolerance. Fault Tolerance 0 disk Space nX
  • 8. RAID 0  RAID 0 – Block-level striping and no redundancy (no parity)  Best performance but no fault-tolerance. Fault Tolerance 0 disk Space nX All Qsan RAID systems support RAID 0
  • 9. RAID 1  RAID 1 – data mirroring with no parity  Best fault-tolerance Fault Tolerance n – 1 disks Space 1X
  • 10. RAID 1  RAID 1 – data mirroring with no parity  Best fault-tolerance Fault Tolerance n – 1 disks Space 1X All Qsan RAID systems support RAID 1
  • 11. RAID 5  RAID 5 – Block-level striping with distributed (rotating) parity Fault Tolerance 1 disk Space (n-1) X
  • 12. RAID 5  RAID 5 – Block-level striping with distributed (rotating) parity Fault Tolerance 1 disk Space (n-1) X All Qsan RAID systems support RAID 5
  • 13. RAID 6  RAID 6 – Block-level striping with double distributed parity Fault Tolerance 2 disk Space (n-2) X
  • 14. RAID 6  RAID 6 – Block-level striping with double distributed parity Fault 2 disk Tolerance Space (n-2) X All Qsan RAID systems support RAID 6
  • 15. RAID 0+1  RAID 01 (0+1) – striped disk sets are mirrored Fault Tolerance 2 disk Space The disk number in a single RAID 0 set
  • 16. RAID 0+1  RAID 01 (0+1) – striped disk sets are mirrored Fault 2 disk Tolerance Space The disk number in a single RAID 0 set All Qsan RAID systems support RAID 0+1
  • 17. RAID 10  RAID 10 – mirrored sets in a striped set Fault Tolerance 2 disk Space The total RAID 1 set number in the RAID 0 set
  • 18. RAID 10  RAID 10 – mirrored sets in a striped set Fault 2 disk Tolerance Space The total RAID 1 set number in the RAID 0 set All Qsan RAID systems support RAID 10
  • 19. RAID 50  RAID 50 – RAID 5 set striped in RAID 0
  • 20. RAID 50  RAID 50 – RAID 5 set striped in RAID 0 All Qsan high-end RAID systems support RAID 50
  • 21. Qsan RAID Systems Unified Storage U600Q, U400Q P600Q, P500Q, P400Q, iSCSI SAN P300Q, P110V04 Fiber Channel SAN F600Q, F400Q, F300Q 21
  • 22. Qsan P Series iSCSIPerformance & High Availability at Affordable Price Enhanced IP SAN High Availability Value Add-on  Dual active RAID controllers  QiSOE (Qsan hardware iSCSI offload engine)  Cache mirroring via high bandwidth channels  QThin (thin provisioning)  Multi-path & load-balancing  QReplica (remote replication) (MPIO, MC/S, Trunking, LACP)  QSnap (copy-on-write snapshot)  Fully redundant & hot pluggable design  BBM (battery backup module) Performance Total Cost of Ownership Flexible Volume for Multiple Applications Green Storage Design  Virtualization: VMware, Citrix, Hyper-V  Auto disk spin down  For cloud storage, surveillance, backup &  Advanced cooling mechanism Archive, video streaming, etc  80 PLUS energy-efficient power supplies 22
  • 23. Qsan F Series Fibre Channel SAN Outstanding Performance, Reliability yet Cost-Effective High Availability Value Add-on  Dual active RAID controllers  QThin (thin provisioning)  Cache mirroring via high bandwidth channels  QReplica (remote replication)  Multi-path & load-balancing  QSnap (copy-on-write snapshot) (MPIO, MC/S, Trunking, LACP)  BBM (battery backup module)  Fully redundant & hot pluggable design Flexible Volume for Multiple Applications Green Storage Design  Virtualization: VMware, Citrix, Hyper-V  Auto disk spin down  For video editing, video streaming, database,  Advanced cooling mechanism backup, etc  80 PLUS energy-efficient power supplies  Boot-from-SAN 23
  • 24. Qsan Unified Storage  Outstanding Performance  Advanced Protection o Hardware RAID o Snapshot o SSD caching o Volume clone o Qsan Unified OS o Battery Backup Module o AntiVirus  Integrated Backup Solution  Storage Efficiency o Amazon S3 Cloud backup o Thin Provisioning, DeDup, Compression o Remote Replication o UnifiedAUTH 24
  • 25. JBOD  JBOD – Just a Bunch of Disks  Each disk works as an independent disk in the array
  • 26. Qsan JBOD J300Q  The Qsan J300Q 6Gb SAS-to-SAS JBOD enclosure supports both SAS and SATA-II drives, providing high availability as well as cost advantages for small and medium business. 26
  • 27. QsanTechnology.com Sales@Qsan.com.tw Thank you very much!