1GB=1000MB or 1024MB

Question

when we talk to storage capacity, say i have a 300G FC disk, does it mean 300 * 1000 MB or 300 * 1024MB?

RRR · Accepted Answer

Giga means billion, so a 300GB disk is 300,000,000,000 bytes.

When you talk about binary Gigabytes, you should write this as GiB, meaning Gibibyte. 12 Years ago this new standard was introduced in the SI system. Allthough this is a standard for a long time, almost nobody knows about this and is asking "where did all my space go to ?", while in fact they don't know what GB means.

Source: http://en.wikipedia.org/wiki/Gibibyte and http://en.wikipedia.org/wiki/SI_prefix

Good question ! At least you're asking !!

dingding1 · Answer

Thanks for great reply, it seems not a stupid question.

RRR · Answer

You're welcome. I'd say: spread the word and educate people to use GiB when then mean binary Gigabytes !

Another thing is that loads of people say SAN when in fact they mean Storage Array... I keep telling them that SAN is a network, not something you can storage data on, but hey..... people store data on a LAN as well, or do they ?

Athma · Answer

Interesting. I was trying to do the same awareness education to my team in my project. Good question and nice answer.

RRR · Answer

We aim to please

Avamar

1GB=1000MB or 1024MB

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