Can someone explain Synology's maths?

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TonyGamble Veteran Member • Posts: 3,029
Can someone explain Synology's maths?

I've been talking about NAS at the NEC today and looking at Synology now I am at home.

They have a product chooser system.

First question how many people on the system. ONE

How much data might you want to store. I picked the minimum of 12TB.

What do I want to store? Pictures.

They recommend a two drive device with two 12tb HDDs.

A 12tb HDD ranges from £330 to £400 on Amazon UK.

Call it £350 and multiply by two. £700.

I thought Synology protection came from RAID systems and at the NEC the rep said that on a four drive unit you got the sum of the four drives less the value of one of them.

If you inserted four 4tb drives into a Synology you'd get four times twelve - and then less the value of one drive. So you'd get 12tb.

But a 4tb HDD only costs £90 so four of those would cost £360.

Far less than the £700 for the two 12tb drives.

And if one failed - and 12tb is just as like to fail as a 4tb - it would cost £90 to replace rather than £350.

Am I missing something.

Tony

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