Ian Cheong wrote:
Please explain in what circumstances one would need to rebuild a server
same day if running mirrored drives.
I presume any failed part (power supply, motherboard, etc) would be
replaceable. Only if both drives crashed simultaneously would one need
to rebuild. (??)
There are good arguments for having a spare HDD and a spare mainboard,
identical to your server's on hand. With RAID1 you should match your
drives, and getting an identical server mainboard in a hurry may be
difficult or impossible after a year or so, due to model obsolenece and
brand name support infrastructure. The rest of the bits shouldn't be too
hard.
Another approach is an emergency server, a good workstation that gets a
copy of the data after the tape or DVD backup each night. Handy too when
re-building a RAID array in business hours.
The joy of RAID 1 is that a HDD failure that would otherwise stop a
medical centre functioning, becomes a warning message on the server's
screen.
One of my inhibitions about terminal services is that you become
absolutely dependent on the terminal server. The major choices become a
high-end 'real' server with redundant everything, like a fully kitted HP
ML350-G4, or a second terminal server online with double the licensing,
hardware and other costs, or relying on a system that will go down
big-time if the server fails with no prospect of an early resumption of
business, as all the clients will be terminals, not be up to it and/or
need major reconfiguration of the whole system. The 'spare bits'
strategy may save the day in the last scenario.
We need to remember that TS was thought up for big corporate
environments with redundant domain controllers and all that other stuff.
Greg
--
Greg Twyford
Information Management & Technology Program Officer
Canterbury Division of General Practice
E-mail: [EMAIL PROTECTED]
Ph.: 02 9787 9033
Fax: 02 9787 9200
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