IBM System Storage DS5000 Series vs Nexsan BEAST comparison

DS5000 storage systems are equally adept at supporting transactional applications such as databases and online transaction processing (OLTP), throughput-intensive applications such as high-performance computing (HPC) and rich media, and concurrent workloads for consolidation and virtualization. DS5000 series storage systems can support service level agreements (SLAs) for the most common operating systems, including Microsoft Windows, UNIX, Linux and Apple Macintosh. 
With drive-level encryption, DS5000 series storage systems support affordable data security with no performance penalty. The DS5000 storage system’s multiple replication options, drive-level encryption, and persistent cache backup can help ensure that any data in cache is captured and safe in the event of a power outage.

Nexsan SASBeast is a high-capacity, high-performance, enterprise-class storage array system ideal for transactional applications that demand high I/O per second. With its storage density of 25.2TB offered in a 4U configuration, SASBeast has the ability to scale to hundreds of terabytes of capacity in a single rack. With 42 high-speed SAS drives, it's optimized for customers whose infrastructures support Microsoft Exchange, Oracle, SQL and other databases, as well as those that involve large file servers, virtual server environments or large amounts of small files. Equally important, SASBeast includes FC and iSCSI connectivity and allows customers to combine SAS, SSD and SATA drives within the same system to address different application requirements.