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Free storage tools & calculators

Accurate, no-sign-up calculators for planning enterprise storage — RAID and ZFS capacity, unit conversion, workload sizing and live configurators. Built and maintained by a 24-year UK reseller.

DataDistributed parity
Most popular

RAID Calculator

Usable capacity, fault tolerance, IOPS, rebuild time and URE risk for every RAID level — RAID 0/1/5/6/10/50/60, RAID-DP/TEC and ZFS RAIDZ.

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ZFS

ZFS / RAIDZ Calculator

Size a ZFS pool properly — parity, ~3.2% slop, (p+1) padding, multi-vdev pools, per-vdev IOPS and the 80% fill rule.

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Converter

TB ↔ TiB Converter

Convert decimal TB to binary TiB (and GB↔GiB) and see why a 16 TB drive shows as 14.55 TiB.

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Converter

IOPS ↔ MB/s Converter

Convert IOPS to throughput (MB/s) and GB/day at any block size — bridge random and sequential performance.

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Endurance

DWPD / TBW Calculator

Convert SSD endurance between drive-writes-per-day and total-bytes-written, and size your daily write budget.

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Sizing

Storage Solution Finder

Set capacity, IOPS, workload and budget for a live, workload-matched platform recommendation across our vendors.

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Lifecycle

Storage EOSL Checker

Look up end-of-service-life dates for storage arrays and plan refreshes or third-party maintenance.

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Power

Power & Cooling Tools

Size the UPS and cooling around your storage — UPS sizing & runtime, watts ↔ amps ↔ VA, and server room cooling (BTU).

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Power

UPS Sizing & Runtime Calculator

Build your IT load and get the recommended UPS kVA/kW, load current, heat output and a Peukert runtime estimate.

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Configurator

HPE MSA Configurator

Build and price an HPE MSA array — controllers, drives, RAID and capacity — new or refurbished.

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Configurator

Dell PowerVault Configurator

Configure a Dell PowerVault ME5 block SAN with live raw/usable capacity.

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Configurator

Tape & Backup Configurator

Size HPE StoreEver LTO tape drives and libraries for air-gapped, low-cost archive.

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RAID level landscape
Level landscape — efficiency vs fault tolerance (typical)012325%50%75%100%drives survivedspace efficiency →RAID 0RAID 5RAID 50RAID-Z1RAID 6RAID 60RAID-Z2RAID-Z3RAID 10RAID 1
Cost over time — disk vs tape vs cloud
£10 years →CloudDiskTapeIllustrative cumulative cost of retaining a fixed cold dataset — tape's low £/TB + no egress wins over long retention