AD Disaster Recovery Planning Scenario To: IT Consultant We have an existing Active Directory environment, consisting of a main office with two DCs, three branch offices with one DC each and a fourth, smaller office with a Read-Only DC. We are evaluating our backup and restore strategy and are wondering which of the following solutions you might recommend for each individual environment? We want to minimize cost but maximize uptime. Which of the following would you recommend for any/all locations and, where applicable, what schedule (daily, weekly, etc.):
- Fault-tolerant hardware (RAID1, RAID5, etc.)?
- Backup of the DC to local disk?
- Backup of the DC to removable storage?
- Additional DC?
Include Return on Investment also…If you can…
Main Office
Branch 1
Branch 2
Branch 3
Small Office
(2) DC
(1) DC
(1) DC
(1) DC
(1) Read-Only DC
To: Client
Thank you for reaching out to me about your business matter. Creating a backup and restore process that would reduce overhead and increase up time is a real task, but obtainable. Looking at the list of questions you asked about the different recommendations I will answer to the best of my ability one by one in the following tables below:
Fault-Tolerance Hardware
Main Office
Branch 1
Branch 2
Branch 3
Small Office
DC Quantity
2
1
1
1
1 Read-Only
RAID
RAID 6
RAID 5
RAID 5
RAID 5
RAID 0 The reason why I would implement RAID 5 in all of the other branches except the small office is due to the fact that the small office only has a read-only DC. If all branches and the small office have to be backed up to the Main Office they can be restored as well. The RAID6 option of the Main Office is the most expensive, but it provides the best functionality and
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