I've been using the Intel Entry Storage System SS4000-E as a simple backup network drive for the last few years. It showed up as Drive Z: on all of my Windows machines and I just copied other drives/folders onto it as needed. It's far from the full capability of this device but it's suited my purposes.
Recently, I decided to upgrade the drives and increase the total storage space from 2 TB (4 500 GB drives, Raid 0) to 6 TB (4 1.5 TB drives). The software doesn't allow me to make one 6 TB drive, so I made three (X:, Y:, and Z:), with sizes ranging from 1.49 TB to 1.99 TB, accessible as \storage\public3, \storage\public2, and \storage\public1 respectively. I also created the required shared folders using the minimum (200 MB) for both so I could have as much room as possible for large shared partitions. I also took the opportunity to upgrade the firmware to version 1.4, build 709, since I was installing new drives.
I backed up some data to the Z: drive (\storage\public1) and filled about 1.5 TB. Then I started copying folders from another system to Y: drive (around 900 GB in all). Everything seemed to be going well until I looked in on the copy after around 800 GB had transferred. Files were being copied *extremely* slowly, like 100 MB in 10 minutes! I aborted the transfer and ran a test to eliminate network issues as the problem. I tried copying a 100 MB file from Y: drive to Y: drive. It took around 10 minutes, as above. I tried the same thing on Z: drive and it was almost instant. Something was somehow causing that part of the network drive to move at a snail's pace.
I then accessed the management screen via a browser and got a message saying that one or more drives had either failed or been changed (Disk Change Notification - raid_disks_changedF.cgi). Two tables that show all four disks - serial numbers and capacities - are shown, one table being previous configuration and the second being current configuration. Both tables are completely identical. Clicking on "Scan" or "Continue" resulted in the same message, so I clicked on "shut down" and tried to access the network drive after it rebooted. I had no problem getting into the Z: drive part of it but both X: and Y: weren't being seen at all anymore.
I'm aware of the fragility of a Raid 0 and wonder if it could be so easily disrupted during a large transfer such that I face the possibility of initializing all four drives and starting over. I'm at a loss as to what could be going wrong here or how to fix it. I really just want a simple means of copying lots of data over from various networked machines without any additional software. This system worked fine before. What could have happened?
Thanks for any help.