Create the Disk Pool:

Step: Use the SANtricity System Manager to create a DDP with the eleven 12 TB disks.

Reason: The DDP automatically reserves space for reconstruction purposes.

Automatic Space Reservation:

Functionality: The system automatically reserves adequate space for reconstruction when a disk fails.

In a Dynamic Disk Pool (DDP), the system is designed to handle drive failures efficiently without impacting data availability. When a drive fails within a DDP and there is no free capacity, the data from the failed drive is rebuilt using preservation capacity within the DDP.

Dynamic Disk Pools use distributed sparing, which allows the spare capacity to be spread across all the drives in the pool rather than relying on dedicated hot spare drives. This distribution ensures that the rebuild process starts immediately and can be completed faster than traditional RAID systems because the workload is shared across more drives.

The preservation capacity is essentially reserved space within the DDP that can be utilized in the event of a drive failure to rebuild the data. This approach helps in maintaining redundancy and protecting data integrity even when a drive fails.

References:

NetApp E-Series Storage System Documentation

SANtricity System Manager User Guide

 A document showing the cabinet layout with cabling information and IP addresses being used

Explanation : This document helps the customer understand the physical and logical layout of the installation, making future troubleshooting and expansion easier.

 Purpose : To display the average service time on a FC target port basis.

 Command : fcp stats -i 5

Usage : Monitors Fibre Channel Protocol (FCP) performance, including service times for FC target ports at specified intervals (every 5 seconds in this case).

 References : NetApp Data ONTAP Command Reference Guide.

 Exhibit Analysis : The exhibit shows the rear view of an E-Series controller with various ports.

 SAS expansion ports : 2 ports (EXP1 and EXP2).

 SAS host ports : 6 ports.

 FC/iSCSI ports : 2 ports (these ports can be configured as either FC or iSCSI).

 References : NetApp E-Series hardware manual and port configuration guides.

FIPS Compliance : The Federal Information Processing Standard (FIPS) requires all components within a system to adhere to specific security standards.

FDE Drives : Full Disk Encryption (FDE) drives are used to ensure data security.

Audit Failure : Adding an FDE drive as a spare to a volume group without proper encryption settings could cause a security audit to fail.

Solution : Ensure all spare drives in a volume group meet the FIPS encryption requirements.

References : NetApp E-Series SANtricity Security Configuration Guide, FIPS Compliance section.

Understand the Requirements: The E2812 system is to be used without expansion shelves, and the customer requires six data volumes.

Consider DDP (Dynamic Disk Pooling): DDP is a recommended configuration for simplifying management and enhancing data protection.

Single DDP Configuration: Using one DDP for all volumes is efficient for the following reasons:

Simplifies the storage configuration.

Ensures balanced use of all drives.

Provides efficient data protection and rebuild performance.

Creation of Volumes: Within the single DDP, create six volumes as required by the customer.

Advantages of One DDP:

Easier management compared to multiple DDPs.

Better performance and protection due to the distributed nature of DDP.

RAID Levels Overview :

RAID 5 : Single parity, moderate overhead.

RAID 6 : Dual parity, higher overhead than RAID 5.

RAID 10 : Mirroring and striping, highest overhead due to 100% redundancy (mirroring).

Dynamic Disk Pools (DDP) : Efficient use of capacity but more overhead than RAID 5.

Overhead Calculation :

RAID 10 has the most overhead because it mirrors all data, effectively using twice the storage capacity.

Capacity Overhead : The overhead in RAID 10 is 50% of the total capacity, meaning if you have 1 TB of usable storage, you need 2 TB of total storage.

References : NetApp E-Series Storage Management Guide, RAID level comparison charts.

Understand ALUA Path Configuration:

Step: Review the exhibit to determine the paths between the host and the EF280.

Reason: ALUA (Asymmetric Logical Unit Access) provides multiple paths for redundancy and load balancing.

Count the Paths:

Observation: Each controller has two ports connected to two separate FC switches, and the host is connected to each switch, providing two paths per controller.

Calculation: 2 controllers x 2 paths per controller = 4 total ALUA paths.

References:

NetApp EF280 System Documentation

NetApp ALUA Configuration Guide