Hi This past week I purchased a SilverStone DS351 esata enclosure along with five 750 GB drives. This enclosure uses the Silicon Image Sil4726 chipset, which uses a port multiplier technology that people on this forum have successfully connected multiple sata drives to and have working. I hooked it all up on Thursday and recorded a bunch of stuff but noticed a few things that made me think I was only using one of the 750 GB drives, rather than all 5. For one, there are LEDs for each of the drives on the front that light up when the drive is being accessed. Only 1 of the LEDs was flashing. Also, when I looked at the percentage of space available, it was going down faster than I expected. So I disconnected it and hooked it up to a Windows PC. Apparently you can't just use any esata card, you need to use the one provided with it, which has the Sil3132 Chipset. I connected that card and could see that by default the enclosure was using JBOD, so the disks were all individual. I installed the software that came with the enclosure to configure the RAID and configured it as RAID 0, where it showed approximately 3.5 TB of available space. I then disconnected it from Windows and reconnected it to my HR20. After a minute or so, I saw all the LEDs blinking on the enclosure, thinking that now everything is working. The problem however is that the space still seems to be going down faster than I would expect. I have recorded 19 1/2 hours of HiDef so far and I have 94% available. Maybe that's correct. That would equal about 325 hours of HD recording on 3.5 TB. Does that sound right? Besides wanting to check the size, I wanted to make a post about this since I haven't seen anything posted about this enclosure yet and wanted people to know that it seems to work and what you need to do to get it working properly. I can't add URLs to my link but I got it at NewEgg and the item number is N82E16817256018. I got the hard drives at Frys for $200 each. Total cost for 3.75 Terrabyte enclosure that looks nice in an audio rack = $1500. I also purchased two 80mm fans from a local computer store because the enclosure doesn't include them. The guy at the store assured me they were very quiet and I have to agree. They are Vantec Stealth fans and although it is a touch louder than it was without them, they cooled the case quite a bit. Before the fans each drive was around 45-48C, after adding both fans each drive is around 35-38C. If anyone can tell me if the size is going down at the right rate and my calculations sound correct it would be appreciated. Also, I'd be happy to answer any questions about this enclosure since I really appreciate this forum and everyone's input. It's been really helpful. Thanks.