1. Slobodan Obradović, Elektrotehnički fakultet, Univerzitet u Istočnom Sarajevu::,
Republic of Srpska, Bosnia and Herzegovina
2. Nikola Davidović, Elektrotehnički fakultet, Univerzitet u Istočnom Sarajevu::,
Republic of Srpska, Bosnia and Herzegovina
3. Borislav Đorđrvić, Institut Mihajlo Pupin, Serbia
4. Borivoje Milošević, Univerzitet UNION - Nikola Tesla Beograd, Srbija, Serbia
5. Valentina Timčenko, Institut Mihajlo Pupin, Serbia
In spite of the appearance of semiconductor memory - Solid State Drive (SSD), magnetic disk drives - Hard Disk Drive (HDD) still play a dominant role as secondary computer memory primarily due to their large capacity, practically unlimited number of write and read cycles and price of stored data per MB. The capacity and speed of a magnetic disk drive are limited by the physical characteristics of materials and technological capabilities. Further increase in capacity and access speed is possible by combining multiple physical disks that behave as one logical device, the so-called Redundant Array oh Independent Disks (RAID). The simplest way to combine multiple independent disks into one is the RAID 0 (Striping) array. Expected advantages are: capacity increase is directly proportional to the number of disks (CN = N * C1) and the access time should be reversed in proportion to the number of TN = T1 / N disks, where N is the number of disks in a row. Unfortunately, measurements on RAID 0 indicate that theoretical values can only be achieved if, when designing the RAID 0 series, parameters are carefully selected which, in addition to the number of disks, significantly affect the performance (read and write rate. These are: the size of the disk block, the size of the data and the width of the queue depth, or the number of parallel transmissions. The paper presents the results of measuring the speed of writing and reading for one disc and series of 2, 3, 4 and 6 disks, without parallel entries and with 4 parallel entries. The influence of the size of the data on the speed of reading and writing was spetialy analyzed.
Thematic field:
SIMPOZIJUM A - Nauka materije, kondenzovane materije i fizika čvrstog stanja
Date:
19.07.2019.
Contemporary Materials 2019 - Savremeni Materijali
Paper file
(131.21 KB)
