Unity 300 Rear View Free Capacity To

Daisy chain additional DAEs in a continuation of the following oder.

EMC claim this product installs in 2 minutes, configures in 15 as one of its key features, in this post well put that to the test and walk through the setup of an EMC Unity 300 array.

The Disk Processor Enclosure (DPE) leverages dual storage processors and full 12-Gb SAS back-end connectivity to deliver high levels of performance and efficiency.

Disk Array Enclosures (DAE) are added to scale out capacity up to 3 PB top end.

There is concurrent support for native NAS, iSCSI, and Fibre Channel protocols whilst the unit itself takes up less rack space than its competitors.

Unity arrays can be managed from the HTML5 web client, or through the CloudIQ service, and offer a full range of enterprise storage features.

However configuring multiple storage pools may be required if you want to separate workloads for different IO profiles or use FAST Cache.

When sizing a storage pool remember that all data written to LUNs, file systems, and datastores is stored in the pool, as well as configuration information, change tracking, and snapshots.

Unity 300 Rear View Free Capacity To

Storage pools must maintain free capacity to operate, EMC recommend at least 10.

EMC generally recommends smaller RAID widths as providing the best performance and availability, at the cost of slightly less usable capacity, e.g.

RAID 6 use 42 or 62 instead of 102 or 142.

Unity automatically reserves 1 out of every 30 drives of the same type for use as a hot spare, you can reduce the number of hot spare drives by decreasing the number of individual drive types.

The system drives cannot be used as hot spares but can be added to storage pools in smaller configurations, if no other disks are available.

The usable capacity of system drives is reduced by around 100 GB, therefore storage pools utilising system drives should use a smaller RAID width.

For larger configurations with high drive counts EMC does not recommend using the system drives as heavy client workload may slow down management operations.

Start with the rear and secure with 1 x M5 screw on each side once the rails are in place.

The array then slides in and is secured with 2 x M5 screws per rail at the front.

Once the array is racked clip on the front bezel, a key is also enclosed.

Next plug in the cables for your chosen front end connectivity, i.e.

Fibre Channel or Ethernet.

Front end ports need to be connected and configured symmetrically across both storage processors to facilitate high availability.

Furthermore you should use all front-end ports that are installed in the system, so that workload is spread across as many resources as possible.

NAS ports should also be configured with LACP grouped per storage processor, to provide path redundancy and performance improvements.

There are 2 on-board 12Gb SAS ports in each storage processor in the DPE.

An additional 4-port 12 Gb SAS IO module can be provisioned with the higher end Unity products but in general this is only required for extremely high bandwidth.

The drives in the DPE are serviced by SAS Bus 0; therefore, the first DAE should be cabled to SAS Bus 1.