Quote: Originally Posted by roadking
Should I assume that the disk that is not in sync would be unusable or would I still be able to use it to access the files if the other disk fails?
What I need to accomplish is a backup copy of the files on a disk that is written to each day to carry offsite. It would be best if the software could write to both locations at once but it does not support this.
I see that your RAID has now re-sync'ed.
To answer your questions : with a RAID1, you should still be able to access the other disk, but the access time will be significantly
slower. In your situation, with so much data...essentially not workable.
You sound like you have a significant dataset. Since you use 1.5TB drives, that means you have 8 x 1.5TB drives? Is that correct? Do these sit in a external enclosure connected by eSATA?
If you can't use a specific network solution (even a portable NAS), which really is the way to go with this amount of data, and if your motherboard supports it, you may want to consider a hardware RAID5 or even a RAID10. However, that means more disks. I have heard anectodal evidence that software RAID is far poorer in performance than a hardware RAID, but I have never tried a software RAID myself.