For the Network Automation NT-4000 Appliance
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Appliance Component Replacement
The Network Automation NT-4000 provides several replaceable units in the system:
•
Hard disk drives in the RAID-10 array
•
AC power supplies
•
System cooling fans
All replaceable units must be replaced with parts of the same specifications as described below. For parts and
replacements, contact your Infoblox field representative or Infoblox technical support.
Managing the Disk Subsystem
The Network Automation NT-4000 uses a RAID (Redundant Array of Independent Disks) 10 array to provide the
optimum mix of high database performance and redundant data storage with recovery features in the event of disk
failures.
RAID 10 uses a minimum of four disk drives to create a RAID 0 array from two RAID 1 arrays, as shown in Figure 18.
It uses mirroring and striping to form a stripe of mirrored subsets. This means that the array combines—or stripes—
multiple disk drives, creating a single logical volume (RAID 0). RAID 10 combines the performance of RAID 0 and the
high fault tolerance of RAID 1. Striping disk drives improves database write performance over a single disk drive for
large databases. The disks are also mirrored (RAID 1), so that each disk in the logical volume is fully redundant.
Figure 8
illustrates the principle.
Figure 8
RAID 10 Array Configuration
RAID 0
RAID 1
RAID 1
Disk 1
Primary
Disk 0
Primary
Disk 1
Backup
Disk 0
Backup
