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Broken Mirror - LavCat - 04-08-2019
I've asked this question in a more technical place but one never knows what wisdom one might discover on the lounge:
I have a Windows NT 4.0 server with mirrored discs. As far as I can tell the system is running normally. However Disk Administrator shows the partitions as "Broken". How can I unbreak them?
The only available choice in the Fault Tolerance menu is "Break Mirror". I would like to restore the mirror or at least get one working disc out of it. I fear if I "break mirror" the system may not boot.
RE: Broken Mirror - GhastMaster - 04-08-2019
Is the OS installed on the mirror? It is strange to me that Disk Admin shows it as Broken, but offers you the option to break mirror. I do not know anything about Windows NT Server. I was curious about your problem and did a cursory search. The following links might provide some insight.
https://www.reddit.com/r/talesfromtechsupport/comments/628wjo/upgrading_nt_40_oh_yes_this_is_oldschool/
https://www.experts-exchange.com/questions/22446697/NT-4-0-Disk-Administrator-breaking-a-RAID-1-mirror-problems.html
Try cloning one(or both) of the drives and booting it in a seperate system?
RE: Broken Mirror - Lissa - 04-09-2019
Typically when you see a mirror broken in disk admin means that one of the drives went bad. You're probably going to need to break it, then start checking to see if a drive is bad. You might even want to shut down the system and check things out with either the BIOS or run some disk utilities.
RE: Broken Mirror - Selby - 04-09-2019
When I was in IT back at the turn of the century we had software mirroring on an NT4 server. The mirror broke. Needless to say it required wiping and reinstalling (which I got to do) to truly fix and we went to a hardware RAID controller with multiple drives to do it right. Fortunately 2k server came out shortly afterward and I upgraded it to that.
Not to be negative, but your fears are valid and you should tread lightly as NT4 was extremely buggy about software mirroring. I also admit that it's been almost 19 years since I last did this, so my absolute recollections on the subject are hazy.
RE: Broken Mirror - LavCat - 04-09-2019
Way back when at work we had a system (my development system) with hardware mirroring on an (Asus) motherboard. The discs were fine but when the motherboard failed we lost everything on the discs. A replacement motherboard of the exact same model did not help.
Looking back through my system event log it's been over a year and a half since mirroring was working. Oops.
RE: Broken Mirror - LavCat - 04-20-2019
New power supply later, things are working again. I verified I could boot the system with either mirrored drive disconnected.
Thanks for the suggestions.
RE: Broken Mirror - DeeBye - 04-21-2019
That's 7 seven years of bad luck.
RE: Broken Mirror - LavCat - 04-21-2019
(04-21-2019, 03:46 AM)DeeBye Wrote: That's 7 seven years of bad luck.
Since it broke over a year and a half ago that's only 5 plus more.
RE: Broken Mirror - GhastMaster - 04-23-2019
(04-21-2019, 03:46 AM)DeeBye Wrote: That's 7 seven years of bad luck.
Thanks for the chuckle.