6
Figure 7 RAID 1E
Application scenarios
RAID 1E is useful when high performance and data protection are more important than the cost of
physical drives.
Advantages
•
Has higher read performance than RAID 1 and mirrors data for an odd number of drives.
•
No data is lost as long as no failed drive is mirrored to another failed drive.
•
Up to half of the physical drives in the array can fail.
Disadvantages
•
This method is expensive as it needs many drives for fault tolerance.
•
Only half of the total drive capacity is usable for data storage.
•
Has lower security performance than RAID 10 when the same even number of drives are used
to create the array.
RAID 5
As shown in
, in RAID 5 configuration, data protection is provided by parity data (denoted
by P
x,y
). This parity data is calculated stripe by stripe from the user data that is written to all other
blocks within that stripe. The blocks of parity data are distributed evenly over every physical drive
within the logical drive.
Summary of Contents for UniServer R4300 G6
Page 36: ...21 Figure 23 Selecting the controller and RAID level 4 Select drives and then click Next...
Page 40: ...25 Figure 27 Selecting the RAID array to be deleted 2 In the dialog box that opens click Yes...
Page 66: ...24 Figure 37 Confirming RAID creation 7 Click OK to complete the RAID creation...
Page 164: ...89 Figure 158 Selecting Main Menu 2 Select Controller Management and press Enter...
Page 321: ...90 Figure 138 Configure Controller Settings screen for the RAID P460 B2...
Page 469: ...19 Examples Viewing physical drive informatoin Syntax mnv_cli info o pd Examples...
Page 513: ...7 Figure 10 Selecting Drive Management 4 Select the target drive and then press Enter...
Page 514: ...8 Figure 11 Select the target drive 5 View the value of the Status field...
Page 529: ...23 Figure 33 Identifying a storage controller 2...