content_image/995387.jpg
## Disk controllers and expansion units 

The customer chooses the disk controller and expansion units for use with the TS7650G. A list of compatible controllers and their expansion units is available at the following IBM Tape Systems Resource Library website: 

http://www.ibm.com/systems/storage/tape/library.html 

Verify the compatibility in the TS7650G ISV and the interoperability matrix document that you find on the website. 

## 15.2.2 The TS7620 ProtecTIER Deduplication Appliance Express 

The TS7620 ProtecTIER Deduplication Appliance Express is machine type 3959 SM2. 

The IBM ProtecTIER Entry Edition software is loaded on the IBM TS7620 to create the TS7620 ProtecTIER Deduplication Appliance Express solution. A separate order for ProtecTIER Entry Edition is required. Clients can choose between the VTL configuration or the File System Interface (FSI), which supports Common Internet File System (CIFS) or NFS as a backup target. 

The following levels of disk capacity can be ordered: 

GLYPH<SM590000> 6 TB (base, software limited) 

GLYPH<SM590000> 12 TB (base, software full capacity) 

GLYPH<SM590000> 23 TB (base, software full capacity plus expansion 1) 

GLYPH<SM590000> 35 TB (base, software full capacity plus expansion 1 and 2) 

Upgrading from 6 TB to 12 TB requires only a license and a software upgrade. For the higher capacity configurations, disk expansion units also must be installed. The TS7620 hardware consists of the left and right slide rails, support tray, cable management assembly, external USB DVD drive, 3959 SM2 server, and any expansion units. 

The TS7620 ProtecTIER Deduplication Appliance Express has system console functions that are included, and does not require a TSSC. The TS7620 is shown in Figure 15-4. 

<img src='content_image/995387.jpg'>

## 15.3 ProtecTIER definitions 

The following definitions apply to ProtecTIER technologies: 

GLYPH<SM590000> Replication 

A process that transfers logical objects such as virtual cartridges from one ProtecTIER repository to another. The replication function allows ProtecTIER deployment to be distributed across sites. Each site has a single or clustered ProtecTIER environment. 

