# Get a decent idea about the steady state performance of an SSD.
# First we sequentially write the drive. Then we completely
# overwrite the device again, this time randomly at 4K. The former gives
# us a good idea of the ideal write performance, you should see flat graph
# of steady write performance. The latter we would expect to start out at
# approximately the same rate as the sequential fill, but at some point
# hit a write cliff and hit steady state. The latency numbers of the steady
# state also provide a good idea of what kind of latencies to expect when
# the device is pushed to steady state instead of peak benchmark-like
# numbers that are usually reported.
# Note that this is a DESTRUCTIVE test. It operates on the device itself.
# It's not destructive in the sense that it will ruin the device, but
# whatever data you have on there will be gone.
description=Sequential fill phase
description=Random write steady state phase