Storage Reliability
Backblaze 6 year drive life projection

Storage Reliability Figures from Backblaze

Backblaze looks at storage reliability across its population of over 25,000 consumer grade hard drives.


RAID Calculator | ServeTheHome

RAID Reliability Calculator Update – STH MTTDL Model

An update of the popular STH RAID Reliability calculator fixes a few bugs from previous versions. The new version should be easier to read



Introducing the RAID Reliability Calculator – Simple MTTDL Beta

One of the most requested features we have on this site is for a RAID reliability calculator. Over the past few years, one of the big questions is how can a user get a rough ballpark estimate about which RAID levels are the mos...


STH RAID Calculator v1.05 – Big Update Including ZFS RAID-Z, RAID-Z2 and RAID-Z3

Last week we launched the ServeTheHome RAID Calculator and it has been quite a success and we received a bunch of feedback on it. This week we have incorporated much of that feedback and turned the RAID Calculator into a much m...



Launching the STH RAID Calculator v1

A few weeks ago I decided that I was going to put a renewed effort into building useful tools for ServeTheHome.com. The first tool is relatively simple, it’s a RAID calculator that allows you to pick RAID levels then comp...


Internal or External Hard Drives: Are Warranties Worth the Cost?

Internal hard drives usually carry a manufacturer’s warranty, commonly three years. Personally, I believe that after three years, one wants to replace drives due to the fact that failures start to occur at a greater rate afte...



Why Excess Capacity for WHS/ Vail/ Aurora and Hot Spares for RAID are Necessary – Mean Time to Recover (MTTR) Guide

A guide as to why excess capacity for WHS/ Vail/ Aurora and hot spares for RAID arrays are necessary from a Mean Time to Recover (MTTR) perspective.


The RAID Reliability Anthology – Part 1 – The Primer

Explaining the reliability of RAID levels 0, 1, 10, 5, 6, 50, 60, and RAID-Z3 in terms of MTTDL and gives a primer on advantages and disadvantages.