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Splitting arrays across storage boxes - good or bad idea?

toomas_aas
Frequent Advisor

Splitting arrays across storage boxes - good or bad idea?

Hello!

We have a MSA1500cs with two MSA30 attached to it. In hopes of achieving better IO performance I have all the arrays split across the MSA30s, i.e. half of the disks in each array are in box1 and half are in box2. But then I started thinking, if one MSA30 dies for whatever reasons, the RAID5 arrays are all toast, right? So maybe this wasn't such a good idea. What do people generally do?
1 REPLY
Uwe Zessin
Honored Contributor

Re: Splitting arrays across storage boxes - good or bad idea?

People split their arrays for performance, not for redundancy. As you've correctly said, you cannot protect RAID-5 against the failure of a complete disk enclosure - but that limitation exists with many other storage arrays as well.
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