[HPDD-discuss] Strange Issue, No space left, where there actually over 500TB

Dear All, Lustre version: 2.4.3 OS: RHEL/SL 6.5 Just wondering if anybody has seen something similar: I have some applications that fail with an error "No space left on device", for example a copy command has failed while copying a 500MB file while we have over 500TB space left. And this is intermittent, I have been able to copy files larger than that after those failures. I have seen this erorr with applications like CHARMM and Gaussian. Only a handful of 3% of our OST's have reached 100% usage, but this should not cause it as I understand. Any thoughts on what could be causing this and how can I go about debugging this will be a great help. Thank you, Amit