Thanks for the advice, Corkyg. Unfortunately I was out of country and didn't see it until just now. How can I test for those Delayed Write Errors? OR disable write caching?
I am a mechanical engineer who builds PCs for a hobby but not familiar enough with HDD controllers. Can you help?
Update: Received a new AMS VEnus 2316SU2S enclosure direct from the AMS eStore.
I installed the Seagate 300G|ST 8M SATA ST3300831AS drive. Had a simple problem when the PC was on standby and I subsequently turned of the Ext HDD and then powered back up, the USB connection and drive were not recognized. AMS tech support came to aid immediately and advised to disable the power management on that USB Root Hub, and the problem is solved.
Had a nice conversation with the AMS rep as this is a very new product, for SATA drives with SATA output as well as USB2.0. He asked for comments so I sent them in to him. Here are a repeat of my comments. Please understand that I have only just installed the drive, have it working and have runa few files onto it and read them back out. Long term use will reveal more about the enclosure.
Here are my comments on the design of this unit. Hopefully you can pass these on to your design engineers:
1) The smoky Lexan front cover and rear ring are unnecessary, and appear to serve no useful purpose, other than to serve to elevate the enclosure above the surface on which it rests for airspace, and to provide a place to attach the rubber pads for feet. Instead I recommend replacing both lexan end caps with black rubber or polyethylene, leaving the cover off the front. You will not need feet pads in this case, if the surface friction factor of the caps is suitable.
2) Inside the enclosure, a set of rubber grommets for mounting the drive would reduce the vibration linkage between the drive and fan and serve to isolate those. Right now they appear to be close enough in frequency to create harmonics.
3) Running the fan from a temperature sensor as you mentioned is a good idea for two reasons: it will extend the life of the fan and reduce noise / vibration and change the frequency linkage harmonics.
4) I?ve read some negative comments about the small power switch. My personal preference is for a small sunken switch like this to avoid inadvertent actuation, as long as the switch itself is robust enough to allow frequent actuation over a long life; say daily actuation for 10 years or so.