Ok, I've been tasked with fixing this problem for the past couple of days, and I can't for the life of me figure this out. I know there are some good techies on here that might be able to figure this one out, as its baffling me.
The computer in question is running Vista Ultimate 32bit with all the latest updates. It's got an older Athlon 64+ processor, 2 gb of RAM, and a RAID-0 array spanning 4 300gb discs. The RAID volume is the D drive. The drives have all been tested and confirmed as being good. They work great individually and have no problems. In fact, the RAID volume works fine as well. I can still read and write to it perfectly. It's working as intended. No data loss or anything.
The array is used only for temporary storage of several large files during their creation. Once they get finished, they get shipped off to the file server where everything else is fine. The problem I'm encountering is when these files are getting created, there is a TREMENDOUS amount of disc useage, IE, the hard drive activity light is lit solid for several hours straight. Lately, after a certain amount of time, which seems to be around 2 hours, the D: volume just straight up disappears from My Computer and Disc Management. Upon restarting the computer, the volume is back with all of the data still intact.
This computer has operated this way for several years FLAWLESSLY. The only time it has been turned off is when the operator has had the computer off for upgrades, IE, new power supply, added more ram, and upgraded the harddrives from 2 120gb drives to 4 300gb drives. When the computer had been running Windows XP, there was zero problems under this configuration for a good year or two. And then the mandate came down to upgrade to Vista. Ok, no problem. I did that. Things were working great for oh, I guess about a month or two. Now when there's heavy disc activity on the volume, it goes buh bye. I restart, its back again. If there isn't heavy disc activity, you can go for weeks at a time and still be able to access the data perfectly without the volume going away silently into the night. It's just when there's heavy reads and writes going on at the same time things get wonky.
I've found similar issues on the web, but nothing that really helps me. Kinda like this one.
I want to tell the higher ups to take this mofo out back and shoot it, but budgeting is tight in the department so upgrading this particular unit is out of the question for the time being. Plus, I can't really say anything, because my computer at home is practically identical.