Server RAID Capacity Calculator

Hot spares reduce capacity calculations (but costs include all drives purchased).

Drive Count

Hot Spares

Display Units

RAID 50 Groups

RAID 60 Groups

Drive Size & Cost

SAS Drive Size

SAS Avg Cost Per Drive (USD)

SAS Total (drive count)

Total$0.00

SAS Raw: — Per-drive: —

SATA Drive Size

SATA Avg Cost Per Drive (USD)

SATA Total (drive count)

Total$0.00

SATA Raw: — Per-drive: —

Drive Count: — Hot Spares: — Usable Drives: — Units: —

RAID	SAS Usable	SAS Overhead	SAS $/Usable TB	SATA Usable	SATA Overhead	SATA $/Usable TB	Min	Risk / Warnings

“TB” is decimal (1 TB = 1,000,000,000,000 bytes). “TiB” is binary (1 TiB = 1,099,511,627,776 bytes).

Cost per drive is based on an average market price and may vary depending on vendor, availability, region, and current market conditions.

SAS vs SATA Comparison Sheet ▾

Quick reference (typical enterprise/server considerations).

Category	SAS	SATA

RAID Comparison Sheet ▾

Summary of common RAID levels used in servers.

RAID	What it is	Min Drives	Fault Tolerance	Best for	Tradeoffs

RAID Capacity & Cost Report

Generated: —

Prepared for

Server Storage Sizing

Drives: — Hot Spares: — Usable Drives: — Units: —

SAS: — SATA: —

Capacity Summary

RAID	SAS Usable	SAS Overhead	SAS $/Usable TB	SATA Usable	SATA Overhead	SATA $/Usable TB	Min	Risk / Warnings

Cost Summary

SAS per-drive: — SAS total: — SATA per-drive: — SATA total: —

Cost per drive is based on an average market price and may vary depending on vendor, availability, region, and current market conditions.

Reference Sheets

Included for context (high-level guidance).

SAS vs SATA	SAS	SATA

RAID	What it is	Min	Fault	Best for	Tradeoffs

Disclaimer: Capacity estimates assume identical drives and do not include filesystem overhead, controller metadata, cache policies, or vendor rounding. Always validate with your hardware vendor.