Has any tried to use seekwatcher lately? For one the report on oss.oracle.com seems to be gone. I found a git repo that seems to have the latest codebase from hg and two little fixes here: https://github.com/trofi/seekwatcher But even that doesn't seem to work in modern environments. After a build with a few warnings actually trying to run it creates doesn't seem to actually work well: $ /usr/local/bin/seekwatcher -o sda2.png -t sda2 using tracefile ./sda2 Traceback (most recent call last): File "/usr/local/bin/seekwatcher", line 983, in <module> run = run_blkparse(x) File "/usr/local/bin/seekwatcher", line 614, in run_blkparse loaddata(fh, rd) File "/usr/local/bin/seekwatcher", line 130, in loaddata tags, options) File "rundata.pyx", line 234, in seekwatcher.rundata.rundata.load_data (seekwatcher/rundata.c:3936) ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all() With not output produces.