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Pros: I've been running three of these for over three years without any problems.
One was connected to a Linux server via USB3 and dropped occasionally but it was a USB3 drivers issue not an issue with the box.
They are all now connected via esata to Linux servers, and rock solid with 4x2TB in RAID5 mode.
Cons: Software. Absolutely no Linux support for monitoring the box status.
I'm not sure who is more to blame for this, jMicron or Mediasonic, but it's a pathetic state of affairs.
I don't need or even want a gimmicky skinned front end, I just want to see the status of the box/drives, just give me a command line program to read the status.
If any of these linux machines were desktop machines I'd try installing the jmicron software under Wine, but these are headless servers so all I want is to be able to see the status, and maybe trigger a rebuild (see below).
Other Thoughts: Both times a drive has failed in one of these they've simply disappeared from the Linux server, which I suppose is one way to know a drive has failed.
In both cases I wasn't able to get them start rebuilding to a new drive till I hooked them up (USB) to a Windows laptop running the jMicron software that can be found on Mediasonics forums (make sure you don't allow Windows to initialize the drive since it won't recognize the Linux file system)
Once the rebuild was complete I disconnected from the windows laptop, reconnected the esata cable to the Linux server and was able to remount without a problem...
Not a good scenario if your doing remote support, but sufficient for local systems.
Pros: Non-Raid Speed, since reflashing the card to the IT configuration and moving it to a Linux server the speed has been great for two software (md) RAID 1 sets.
Compatibility, has "Just Worked" in both machines/OS's it's been in.
Cons: Poor RAID Performance. Not really a surprise as it has no onboard memory cache) but we hadn't expected high end performance for this price so not taking any stars away.
Other Thoughts: I picked this up as a cheap temporary solution for a VMWare ESXi server, it worked and got use through till a new server with fibre SAN was ready.
Having dealt with many HW vendors, it's very nice to see a RAID vendor where I don't have to go through hoops to get the firmware I need, or even documentation.
Pros: Easy to setup, quiet.
I've had one of these for over a year as online backup of my main data server with zero problems.
Just added another and again it just works.
Cons: Somewhat slow RAID5 writes, but that is to be expected, we are getting the same write speed on both eSATA and USB3, for reads eSATA is slightly faster than USB3.
Other Thoughts: Some of the speed issues may be down to the 'green' drives we put in, high performance wasn't the goal and these drives run far cooler.READ FULL REVIEW