MICRON’S REALSSD MANAGER
Micron’s P320h is accompanied by two powerful management options. The command line manager works for both Linux and Windows systems, and is provided for servers without graphical interfaces. Many will actually prefer the CLI way of managing the P320h.
The command line interface may allow users more flexibility, but the GUI is pretty nifty too. The GUI is just a front end for the command line RealSSDManager, but the interface is simple and clean.
The main tab of the RealSSDManager shows media wearout, throughput, and temperature “gauges”. The P320 gets warm just idling, but can get downright toasty when writing for sustained periods of time. The P320h begins throttling when temps hit 87 degrees Celsius, until such time as the internal sensor detects temps returning to a normal operating range.
Both managers also are capable of tracking throughput in MB/s. In the circumstances above, the P320h is shown writing for eighty minutes, with corresponding temperature logs. With multiple drives deployed, keeping an eye on all of them simultaneously isn’t easy without tools like these.
Lastly, Micron has seen fit to equip the P320h with useful, if not totally comprehensive SMART data. This unit suffered an erase failure during testing, and is 1% of the way to write protect mode. Once the drive decides the flash is completely worn, it protects the data left by going into a read-only operation. Micron’s other drives do this as well, as do many other makes and models. It is nearly impossible to actually see this happen in the real world, though.
The P320h does have a somewhat unique feature. Three different interrupt coalescing settings are provided, depending on whether the Micron is going to be used in environments with significantly less or more than 256 outstanding commands. Essentially, these interrupt settings define when commands get posted. The default D200F setting is the best all around setting, but in cases where OIO count is greater than 256, the D801F setting can let more IOs get posted with a single interrupt. For lower QD operation, the D020F setting can help optimize performance with less than 32 commands outstanding. Still, the P320h is clearly intended for demanding applications, and using it at low QD is not optimal.