Promise Technology SX4300 User Manual
FastTrak SX4300, SX8300 User Manual
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•
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.
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.
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