This message is from the T13 list server.
I asked about this originally, so I'll add a couple of things. On Thursday 22 April 2004 14:46, Pat LaVarre wrote: > This message is from the T13 list server. > > > frequent automatic unloading on the heads ... > > failures of disks around 6-9 months after they are deployed ... > > generally have very high "load cycle counts" in the > > SMART data, and while inspecting one I found that there appeared > > to be tiny plastic particles ... > > I find immediately I wonder: > > Did the vendor report load cycle counts for drives tested til > (accelerated) failure during design qualification? I don't have that information. > > "aggressive" power management > > A newbie pitfall found in some t10.org standards is to code the power > management to park at a fixed rate. Solve enough actual problems with > such an app and eventually that fixed rate runs just above the fixed > rate at which the app actually streams compressed data, for example. > The natural implicit result is then a maximally accelerated test til > failure: read, park, repeat, indefinitely. Unfortunately, that is exactly what these drives do, with "advanced power management" enabled (which it is by default). (It's also what the standardized "standby timer" tends to do on most drives, if you program it with a short interval, but software has more control over that.) I don't want to name names, but suffice to say that the implications of this are big and are making me (and many other people) blue.
