Re: How does RAID 1 work in restore situation - Briefly.
- From: "Pegasus \(MVP\)" <I.can@xxxxxxxxxx>
- Date: Sun, 27 Jul 2008 09:15:07 +0200
"ThomasAJ" <ThomasAJ@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:FBBEBA70-5D7F-4403-BA0A-47DFEC2EE53D@xxxxxxxxxxxxxxxx
I know Raid 1 uses 2 identical disks and stores the data identically on
each
one.
I also only want to talk about hardware raid. I have a very simple W2003
setup with 5 users on Terminal Services.
I want to upgrade my 3YO IBM X206 with a new server that has hardware raid
and 2 drives. The new server has cold-swap drives feature. (I cannot get
any
technical person from IBM to talk to me - go figure)
So what happens when a drive fails?
Does the W2003 know about? Does it issue a message? Does it stop working
altogether until whatever is done?
Should I purchase a 3rd IDENTICAL drive so when one fails it can take
over?
Does it takeover automatically? or do I replace the fallen over one with
it?
OK you see I have no experience at the recovery end. I have spent a lot of
hours scouring the IBM site in order to find out how raid works from
beggining to end. No luck.
--
Regards
Tom
You're talking about a disk mirror. When one of your disks fails
then the system generates an error message but it continues
operating normally. This gives you the opportunity to shut down
the system, replace the failed disk and rebuild the mirror. There
is no automatic failover in a RAID1 configuration.
To gain confidence, you should go through a practice run with
you mirror. Unplug the data cable and watch what happens (but
switch the system off before you plug it back in again!). See
if you can boot the machine with one or the other mirror disks.
.
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