4. How to Use
User Guide
Page 4-12
4.1.6
Preference
4.1.6.1
Disk Lag Proof Mode
This feature ensures the stability and continuity of the RAID performance. In RAID 5 and
RAID 6, DLP prevents the aging or slow responds of a single hard disk from influencing
the overall performance. The advantage of this feature will not be felt until some hard
disks fail to perform well.
DLP concept
In the event of performance degradation or delay of a single drive due to aging, the
ExaSAN RAID system reads both data and parity stripes concurrently. It bypasses the
slow reads and returns data to the host with the regenerated data and to provide
stabled performance based on the RAID parity.
Note
Although slow responds of some hard disks can be tolerated in
DLP mode, you may use S.M.A.R.T. function to check the
conditions of hard disks in an array and replace the faulty ones.
Note
This function does not support JBOD and NRAID.
Summary of Contents for ExaSAN A12S2-PS
Page 8: ...1 Introduction User Guide 1 Introducing ExaSAN PCIe 2 0 Storage System...
Page 28: ...2 Preparation User Guide 2 Preparing to Install ExaSAN A12S2 PS...
Page 31: ...3 Installation User Guide 3 Installing the ExaSAN A12S2 PS...
Page 47: ...4 How to Use User Guide 4 Using RAIDGuard X...
Page 77: ...4 How to Use User Guide Page 4 30 2 Check the Confirm box and click Unlock Drive...
Page 79: ...5 RAID User Guide 5 RAID Overview...
