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An accounting database needs clock speed, virtual machines need memory, files need disks. Their requirements differ and often contradict each other.
Requirements first, hardware second. The other way round leads to buying a powerful server that is held back by its disks.
An accounting database needs clock speed, virtual machines need memory, files need disks. Their requirements differ and often contradict each other.
The array layout, the type and number of drives. Performance depends on it more than on the processor.
When the volume outgrows local disks or several machines need access at once.
Two power supplies, mirrored disks, several paths to the network, and a second machine if needed.
Installation, power, network, configuring the controllers and remote management.
Packages that include an engineer visit and part replacement within an agreed time.
Stock builds arrive in about two weeks; made-to-order configurations from a month and longer.
What will run, how many people, what volume of data and how fast it grows.
We list the items with explanations and show cheaper and more expensive options.
Ordering, delivery, acceptance, racking.
Arrays, a virtualisation environment or an operating system, documentation and handover.
A disk array filled to the brim starts behaving unpredictably. Speed drops, a rebuild after a disk replacement stretches over a day, and there is not even enough free space for temporary files. Plan so that no more than seventy per cent is used in normal operation.
More smaller disks are usually faster than two large ones, because the load is spread. But statistically there are also more failures, so the array layout is chosen according to what matters more: speed or resilience.
While there is one machine and the volume is moderate, quite. Separate storage is needed when there are several servers that require shared access to the data, or when the volume no longer fits inside the case.
Either extend support with the manufacturer or keep spare parts yourself: a power supply, a couple of disks, memory modules. Working without either is risky - a part for a discontinued model can take weeks to find.
Write what will run and how many people will use it. We will send a costing with an explanation of every line.
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