IDE Raid, failed hdd recover time

We have IDE Raid, we have backup, we have backup HDD.

When the primary HDD failed, what should be "right" procedure?

The primary failed;
The redundant secondary disk keeps running;

1. If I make this secondary to be the primary, and put one brand-new secondary drive in and resyn, I need to unplug the network for so long that clients cannot bear.

2. If I do backup and recover the backup to a new server, in the mean time, let the secondary drive running, the data between the time I do backup to the time I am able to recover and put it back to network are gone. There might be transaction, new members joining. All data of my clients will be gone between the backup-recovery time.

What is the procedure is like when you guys face this problem?

 

 

 

 

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