I've got a Mac running 8.6 on which one of the hard drive partitions (the main one) seems to be locked. The lock icon appears in the upper-left of Finder windows, and the data on the drive is completely inaccessable. When I boot up off a different partition or cd, the volume remains locked except a couple apps (such as Opera) will still launch even though nothing else will.
The drive is not mounted write-protected or locked by any other method that I am familiar with. Has anyone run into anything similar to this, and/or have any ideas of what I could try doing to fix it? This is somewhat important, so quick responses would be appreciated. Thanks!