Chi Corporation

Storage and SAN's
Chi offers a wide range of storage appliances (including DAS, NAS, and SAN technologies) that can be incorporated into a variety of designs to meet your company’s specific needs. As storage requirements grow, the need for centralized management, uptime, and recoverability also increase. Chi specializes in designing highly-available designs that can be tuned to meet your specific RPO (Recovery Point Objective) and RTO (Recovery Time Objective).

A Direct Attached Storage (DAS) system is directly attached to one computer or server. A DAS system enables storage capacity extension for a server, while maintaining high data bandwidth and access rates. Typical connection protocols include fibre-channel, iSCSI, SCSI, and SAS.

A Storage Area Network (SAN) is a specialized network that provides access to high performance and highly available storage subsystems using block storage protocols such as fibre-channel, iSCSI, and Infiniband. The SAN is made up of specific devices, such as host bus adapters (HBAs) in the host servers, switches that help route storage traffic, and disk storage subsystems. The main characteristic of a SAN is that the storage subsystems are generally available to multiple hosts at the same time, which makes them scalable and flexible.

Network Attached Storage (NAS) systems have their own network address(es) and filesystem(s). Typical connection protocols include NFS and CIFS. One major benefit of a most NAS systems is the ability for the same data to be accessed simultaneously by Windows-based systems (through CIFS) and Unix/Linux-based systems (through NFS). Client-server file requests are mapped to the NAS file server allowing access to the data at the file level.

A Solid-State Drive (SSD), sometimes called a solid-state disk or electronic disk, is a data storage device that uses solid-state memory to store persistent data with the intention of providing access in the same manner of a traditional block i/o hard disk drive. SSDs are distinguished from traditional magnetic disks such as hard disk drives (HDDs), which are electromechanical devices containing spinning disks and movable read/write heads. In contrast, SSDs use microchips which retain data in non-volatile memory chips and contain no moving parts. Compared to electromechanical HDDs, SSDs are typically less susceptible to physical shock, are silent, have lower access time and latency. SSDs use the same interface as hard disk drives, thus easily replacing them in most applications.
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