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Protecting against failure of a disk array

What do you recommend for protecting against failure of a disk array? We have replication via EMC SRDF, but failover is not automatic. Do you use "duplex mirroring" via software RAID 1 connecting to two disk arrays?

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I cannot make a blanket recommendation without knowing more of the specifics. There are a number of replication products with failover capabilities built into them and most of them are not tied to the disk vendor, as SRDF is.

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This was first published in October 2002

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