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Topic

Datacenter

Racks, cooling, RAID/IOPS and availability.

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A Datacenter in One Room Racks that breathe, BTU and air conditioning, RAID and IOPS, and availability “nines” explained in minutes of downtime. ≈ 13 min read →

7 tools

Rack Capacity

Calculate rack units, power draw, BTU heat and weight.

RAID Capacity

Calculate usable capacity, overhead and fault tolerance for RAID 0/1/5/6/10/50/60 and JBOD.

Heat Load / BTU

Convert equipment, people and lighting load into heat (BTU/h or kW) and recommend the AC capacity.

Availability & SLA

Compute a system's availability from MTBF/MTTR and redundancy (series, parallel, N+1), with the nines and downtime per year.

IOPS with RAID Penalty

Compute the functional IOPS of an array from disks, RAID level and read/write mix, applying the write penalty.

Storage Growth

Project when your storage fills up from current usage and growth rate (linear or compound), with a threshold alert.

Airflow / CRAC

Convert heat load (kW) into airflow (CFM/m³·s) and tons of refrigeration from the air ΔT, to size the CRAC.