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Mirroring... also licensing!

By Whatme? ·
I have never tried to mirror a hard drive. Is it possible to do in W2K server? or do I need a raid solution.
#2. I wish to install w2k server on a single domain model but across 5 separate locations within Canada. The links are an acceptable range.
I intend to install w2k server on 5 separate servers w/ global cataloges DNS , DHCP on each for failover reasons. I will have a total of 50 users accessing our domain. Do I buy a separate W2K server softwrae for each server? and should I split up my user base for each or should I purchase 50 cals for 1 server?????

Thanks
Merv

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Mirroring... also licensing!

by timwalsh In reply to Mirroring... also licensi ...

1. Win2K will support software mirroring, but only if the disks are converted to Dynamic Disks in the Disk Management Tool. The trick with Dynamic Disks is that once converted, fault tolerant options (such as mirroring) are not available with partitions that were created prior to the disk being converted (such as a boot or system partition). If you want to mirror entire drives (vs. specific partitions), you would be better served with a hardware solution.

2. It looks like you are going down the right path for your domain organization. I'm assuming the servers at each site will be domain controllers. Realize that with DHCP, a client will accept a IP address from the first DHCP server to answer (which will probably be the local DHCPserver. If the DHCP servers have overlapping scopes, you run the possibility of 2 different servers issuing the same IP address to different computers. Therefore you need to split the scopes. Also to provide true fault tolerance, each scope will have to be large enough to provide IP address to all computers. Also be aware that in order to pass DHCP requests from one subnet to another, either you routers must be RFC-1542 compliant (most new ones are) or yu need to configure your servers as DHCP relay Agents.

3. Reference licensing: Yes you will need a separate server license for each server. How many CAL you need is determined by the licensing mode you use. In the Per Server mode, you would need a number of CALS equal to the number of servers installed X the number of clients likely to access each server. In your scenario, for fault tolerance purposes, every client has the possibility of accessing every server at any given time. Therefore you would need a total of 250 licenses (5 servers X 50 clients) (if all 50 computers are logged on at the same time).
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Mirroring... also licensing!

by timwalsh In reply to Mirroring... also licensi ...

In the Per Seat mode, you would need a number of CALS equal to the number of clients physically connected to the network (regardless of the number of servers).

The mode you choose (and thus the number of CALS you really need is based on how many users are logged on concurrently. For example, if you only have a total of 5 users at each site working at any given time (total 25 concurrent log-ons), you could get away with buying only 25 CALS in the Per Server mode vs. needing 50 in Per Seat mode even if you have no users logged on. However in this scenario, if a 26th user attempted to connect, he would be denied access in the Per Server mode.

Hope this helps. Good luck.

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Mirroring... also licensing!

by Whatme? In reply to Mirroring... also licensi ...

Thanks
Merv

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Mirroring... also licensing!

by Whatme? In reply to Mirroring... also licensi ...

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