With the increasing amount of information, a more crucial role becomes storing large amounts of data. With the increase of data, companies must find more efficient ways to store them. There are three storage options, the main differences are the availability, performance and centralized management capabilities. To choose the most appropriate and compatible solution – DAS, NAS or SAN, Baltijas Informācijas Tehnoloģijas, in collaboration with the leading manufacturers Hewlett-Packard and IBM offers an individual approach and help choosing the solution that best fits the organization’s needs.
One of the main important component of data storage solution is backup procedure, so, if necessary, all data could be recoverable. Nowadays, there are countless ways to do back up your data, however, you always should take into notice that, whether the equipment allows you to restore all the necessary information, how fast it can be done, and how easy or difficult is the data recovery process. When you are choosing a data recovery solution, it is important to take into notice two main criteria – RPO (Recovery Point Objective) and RTO (Recovery Time Objective), which means that you can measure specific time intervals in which it is necessary to backup data, so it will be possible to recover the latest data, as well as it will help you to find, how long does it take to recover the data. The right way is to have small intervals, so you will be able to recover the latest data. Usually backup procedures happen in two levels, first level – Disk-To-Disk (D2d) that allows to restore data faster, second level – Disk-To-Tape (D2T) that could take more time to recover the data. Thereby D2T have lower TCO (Total cost of ownership) level.
DAS (Direct Attached Storage) – solution means that data storage appliances are connected to server using ATA, SATA, Esata, SCSI, SAS, Fibre Chanel protocols. The main advantages of DAS are low cost, simple implementation process and relatively fast data exchange between disk array and server. This solution usually is applicable for small companies with small amount of data.
NAS (Network Attached Storage) – solution allows a quick increase of disk space for local network devices. NAS has a specific operating system and a set of functions that provides access to information. One of the main advantages of NAS, is the possibility to simply integrate additional data storage systems in the same infrastructure, as well as relatively low cost of solution implementation.
SAN (Storage Area Network) – SAN solution is separated, a high-pass-through network, consisting of several data media devices that are connected to the servers. SAN is based on Fibre Chanel, ISCSI or SAS protocol. Block-level data storage provides that all applications in local network can access data that is powered by other network devices. SAN media devices can be either tape libraries or other disk arrays that are connected via RAID.