Personal computing discussed
Moderators: renee, Flying Fox, Ryu Connor
frumper15 wrote:I think some more information about the array would be helpful - make/model, connection type (esata, usb, firewire, etc), RAID type, etc. Did you accidentally unplug the power or the data connection? If it was power, does the array have any kind of battery backup for the cache (assuming write-cache) was enabled. If it doesn't it could be that there were cached writes that were lost. A quick google brought me here: http://superuser.com/questions/583153/h ... -dirty-bit
just brew it! wrote:Does this thing have its own RAID processor, or are you using Windows software RAID? It makes a big difference in how you proceed to try and fix this.
Captain Ned wrote:just brew it! wrote:Does this thing have its own RAID processor, or are you using Windows software RAID? It makes a big difference in how you proceed to try and fix this.
From what little I can Google it really wants to be attached to a Mac.
suicidemonkey wrote:Yep it has a RAID controller built-in.
I can't copy all of the data off easily, there's almost 2TB of it and short of buying a new external drive, I have nowhere to copy it to.
The LCD display on the front of the enclosure indicates the hard drives are "ok", so I think it must be a Windows problem.
I just tried Seatools and it failed the "long generic test" but didn't give me an option to fix it. So I guess I'll try chkdsk again.
just brew it! wrote:
Edit: Another potential concern with external RAID enclosures like yours is, if the enclosure itself dies you need to get another (possibly identical, but at least from the same vendor) enclosure to recover your data. This is why I tend to stick with software RAID...
suicidemonkey wrote:I don't think that's the case. I can pull either of the drives out, put them into a USB hard drive caddy and Windows will read them. I guess that's because they're simply mirrored - striping would be a different story.
Airmantharp wrote:Would rebuilding the array destroy the data?
If you could chkdsk each drive separately and choose the better copy (or flip a coin), could you then nuke one and rebuild the mirror?
Prestige Worldwide wrote:Why is every thread I see about RAID always about problems? I can't say I know a whole lot about RAID but sheesh, enough to make me not want to use it.
suicidemonkey wrote:Prestige Worldwide wrote:Why is every thread I see about RAID always about problems? I can't say I know a whole lot about RAID but sheesh, enough to make me not want to use it.
Can't really blame it on RAID, I did yank the cable out when it was running. Doing that would be bad for any setup.
I've been using RAID in various forms for years. This is the first real issue i've had.
Prestige Worldwide wrote:Why is every thread I see about RAID always about problems?
JBI wrote:- We've been using RAID-1, -5, and -6 (both software and hardware based) for the past 6+ years where I work, and have had good results with it. All of our file servers and some of our desktops use RAID in some form.
- I've been using RAID-1 and RAID-5 (all software based) for the past 4+ years at home, and have had good results with it here as well. My file server and two desktop systems run software RAID arrays.
Glorious wrote:You mentioned hardware-based RAID at work, but I imagine that's probably better-tier stuff? If so, same deal with my work. It all works great, but it's not even remotely consumer-grade.
just brew it! wrote:Glorious wrote:You mentioned hardware-based RAID at work, but I imagine that's probably better-tier stuff? If so, same deal with my work. It all works great, but it's not even remotely consumer-grade.
Yup. Enterprise-grade controllers & SAS drives, servers with redundant PSUs, UPSes, the works. The non-hardware ones run Linux software RAID.