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
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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
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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
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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
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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.
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27. QsanTechnology.com
Sales@Qsan.com.tw
Thank you very much!