Arena Storage Glossary
Arena offers a comprehensive line of innovative and affordable storage solutions for every aspect of your business or an enterprise organization with multiple data centers or locations.
Our product includes Fibre Channel (FC) and Internet SCSI (iSCSI), Storage Area Network (SAN) solutions for storage virtualization and consolidation needs for file-based systems; Direct Attached Storage (DAS) to expand your server capacity object-based storage to handle the rapid growth of unstructured data; intelligent storage software to simplify management and increase efficiencies; and storage networking options to optimize your infrastructure.
Below is an overview of the Arena Storage Components:
Disk-to-disk backup is increasingly being implemented as an alternative to tape-based backup operations. Backup to disk provides a significant performance advantage over tape, which can greatly reduce your backup window.
Disk-to-disk backup better performance than tape-based backup, allowing for speedier recovery and/or access time, because of the nature of disk versus tape. Disk writes data randomly, while tape data is stored sequentially. Using disk backups, you can also perform concurrent backup sessions with minimal loss of performance.
Direct-Attached Storage provides a local, dedicated pool of storage connected to one or more servers. A DAS storage subsystem contains a number of SAS or SATA drives in an enclosure and attaches directly to a server through a host bus adapter (HBA). The DAS system itself does not connect to a network device and is thus not shared storage.
A DAS system can connect to multiple computers as a local cluster, depending upon the number of ports available on the DAS. Clustering techniques, like cluster continuous replication (CCR) and standby continuous replication (SCR), are enabled on that subsystem to enable fault tolerance. DAS allows dedicated capacity expansion for application servers so that you can achieve greater performance and complete control and utilization of the underlying storage.
A storage area network (SAN) is a network of shared storage devices such as disk storage arrays and tape automation. The architecture of a SAN enables storage resources to be shared among multiple servers on a local area network (LAN) or wide area network (WAN). Because stored data is managed on dedicated arrays, server processing power is optimized for business applications, and storage capacity can be provisioned to servers and applications according to their needs. SANs can also improve data protection, business continuity and scalability over other options such as direct attached storage ( (DAS). Finally, SAN storage can simplify data tiering and can lead to better resource utilization.
A SAN does not provide file abstraction, only block-level operations. However, file systems built on top of SANs do provide file-level access, and are known as SAN file systems or shared disk file systems.
Cloud storage is a model of networked online storage where data is stored in virtualized pools of storage which are generally hosted by third parties. Hosting companies operate large data centers, and people who require their data to be hosted buy or lease storage capacity from them. The data center operators, in the background, virtualizes the resources according to the requirements of the customer and expose them as storage pools, which the customers can themselves use to store files or data objects. Physically, the resource may span across multiple servers.
Cloud storage services may be accessed through a web service application programming interface (API), a cloud storage gateway or through a Web-based user interface.
What is Storage Virtualization (SV)? Wikipedia defines storage virtualization is "the abstraction at any layer in the storage software and hardware stack.". This is what a SAN can do, in general, but there are many more features that SV can bring you.
Broadly speaking, a 'storage system' is also known as a Storage Array or Disk Array or a filer. Storage systems typically use special hardware and software along with disk drives in order to provide very fast and reliable storage for computing and data processing. Storage systems are complex, and may be thought of as a special purpose computer designed to provide storage capacity along with advanced data protection features. Disk drives are only one element within a storage system, along with hardware and special purpose embedded software within the system.
Storage systems can provide either block accessed storage, or file accessed storage. Block access is typically delivered over Fibre Channel, iSCSI, SAS, FICON or other protocols. File access is often provided using NFS or CIFS protocols.
JBOD (for "just a bunch of disks," or sometimes "just a bunch of drives") is an array of hard disks that haven't been configured according to the RAID (redundant array of independent disks) system.
This feature provides users the option to attach external SAS JBOD unit to expand the capacity of their storage solution. By cascading the RAID-less SAS JBOD unit helps reduce the total cost of ownership.