Promise Technology FASTTRAK SX4300 User Manual download pdf (Page 46)

FastTrak SX4300, SX8300 User Manual

• A/B indicates which striped pair the drive belongs to.

• 1/2 indicates which part of stripe data.

Under RAID 10, the array maintains data integrity if any 1, 2 combination

survives.

JBOD – Single Drive

An alternative to RAID, JBOD capacity is equal to the size of the disk drive itself.

JBOD appears in the User Interface as one individual drive.

There are no performance or fault-tolerance features. When one disk fails, all

data on that disk is lost. The other disks are unaffected.

CH1 CH2 CH3 CH4

Drive A1 Drive A2 Drive B1 Drive B2

Event

Failed

Drives

Logical Drive

Status Why?

1 A1/A2 Functional B1/B2 retain integrity

2 B1/B2 Functional A1/A2 retain integrity

3 A1/B2 Functional B1/A2 retain integrity

4 B1/A2 Functional A1/B2 retain integrity

5 A1/B1 Offline B2/A2 contain only half the data

6 B2/A2 Offline A1/B1 contain only half the data

Disk Drive

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 67 68

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Promise Technology FASTTRAK SX4300 User Manual Page 46