> I suppose running fsck on a 6 TByte file system will take hours Based on my own experience with a 7T filesystem, I would suggest you try it rather than masking assumptions.
Depending on your use case, you may be able to speed fsck up dramatically by choosing the parameters for your filesystem suitably. I find that fsck on a filesystem built with -f 8192 -b 65536 -n 1, for example, is a great deal faster than on a filesystem built on the same amount of disk space with the defaults. (I have a few filesystems for which that combination of parameters is appropriate: a small number of large files with little churn.) /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mo...@rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B