Timeline of the CESNET Data Centers

Data Center Year of Deployment Decommission
DU1 1/2014 9/2019
DU2 11/2012 12/2019
DU3 9/2020
DU4 11/2017 in operation
DU5 12/2018 in operation
CL1 1/2019 in operation
CL2 1/2020 in operation
CL3 3/2022 in operation

Data centers


Pilsen data center utilizes three-layer model, where the highest layer is represented by fast FC (Fiber Channel) hard disks , second layer consists of SATA HDD and the lowest layer consists of tape library. Data center is in operation since May 2012. It has 500 TiB of hard disks , 3584 TiB of switchable hard disks and 4,8 PiB of tapes (extendable up to 5,5 PiB by providing extra tape media).

Datacenter pictures



Tier 1 consists from two single disk arrays DCS3700 with 342 pcs of 3 TiB SAS HDD. The hard disks are splitted into 32x (8+2) + 2x (6+2) RAID6 groups. Six hard disks are configured such a spare hard disks . Total net capacity of Tier1 array is 804 TiB. Tier 2 consists on the one hand from 7 pcs of MAID arrays Promise Vess R2600fiD and on the second hand from the tape library IBM TS3500. In the MAID arrays is in total installed 734 pcs of 4 TiB HDD. Those hard disks are splitted into 41 groups of RAID6 (16+2). There are 4 hard disks used as a spare hard disks in each disk array. In total is thus available 648 data hard disks with net capacity 2496 TiB. Tape library TS3500 has capacity 3744 TiB.

Datacenter pictures


Tier 1 consists of two disk arrays DCS3700 with 4 TiB capacity. Tier 2 consists on one hand of 3 pcs of MAID array Proware EP-4643S and on the second hand of tape library IBM TS3500. Usable capacity of MAID arrays is 2116 TiB and 3520 TiB in case of tape library.

Datacenter pictures

Last modified:: 15.06.2022 15:31