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Amount of SAN storage Required

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Last Modified: 2013-11-14
Hi,

This is going to be a bit of an odd question.

I remember when purchasing a SAN before (EMC Clariion CX3-20) I wanted it to back up all live data on the SAN to another volumen or LUN (believe this is snapshot) and then it would back up to tape every 2 weeks .

The live data amounted to about 4TB. I remember a colleague saying that I should really get approx 16TB of disk space, as to ensure growth for backup data. (I think).

I am trying to remember why so much (it wasnt about money or him being a sales guy) data, but i'm sure it was correct.

Can anyone enlighten me? I know its kind of vague and I cant contact the guy any more.

Thanks if you can help
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andyaldersaggar maker's framemaker
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Live data 4TB, parity 4TB (maybe less), spares 2TB, snapshot area 4TB, reserve space 2TB - that's about where you're at.

I would recommend very strongly about using SATA disks (or anything in SATA sizes - 256GB, 500GB, 750GB, 1TB, 1.5TB etc. unless you are absolutely sure performance will be enough. You don't buy a Porsche and put two-star petrol in it.
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the extra space is for the incremental backups etc, your probably doing a full backup once a month or week, with incrementals most days and a diff every so often, so your 4 gigs of data can easy add upto 16
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Thanks. Sorry for delay.
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