Author(s):
1. Nikola Davidović, Elektrotehnički fakultet, Univerzitet u Istočnom Sarajevu::, Republic of Srpska, Bosnia and Herzegovina
2. Slobodan Obradović, Elektrotehnički fakultet, Univerzitet u Istočnom Sarajevu::, Republic of Srpska, Bosnia and Herzegovina

Abstract:
RAID is a technology that allows multiple data storage devices to be connected into a single logical unit that becomes a single storage space. RAID technology enables the connection of multiple storage devices so that their total capacity and speed are used in the best possible way to store data while maintaining the integrity of the data in the event of failure of any of these disks. Until recently, RAID technology was primarily intended for hard drives. However, the reduction in the price of SSD devices has significantly increased their application in data storage, so there is a need to analyze the performance of RAID arrays that make up these devices. RAID 5 level gives all the advantages of RAID technology both in theoretical expectations and in practical measurements. The addition of each new device increases storage space and performance, and the use of bit parity ensures integrity. Practical implementation brings some limitations and problems that in some cases of a poorly configured array, can lead to a fall in overall system performance. Analysis of the impact of configuring a RAID 5 array can best be done based on measuring write and read speeds. The parameters that were changed during the measurement are stripe unit size, workload block size, queue depth, and the number of devices that make up the RAID 5 array of the SSD.

Key words:
disk array, RAID 5, system performance, strip unit, workload, queue depth

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
03.07.2020.

Conference:
Contemporary Materials 2020 - Savremeni materijali