October 10, 201015 yr Okay, I really don't understand this. Why does it take 2 to 4 times as long to transfer files between drives of unRAID over transferring from computer to unRAID (or unRAID to computer)? If it matters, this is using OS X to do the transfers and not via command line in unRAID. For example, it may take a 4GB file approximately 4 minutes to transfer from Mac to unRAID, but 8 to 24 minutes to copy from one drive to another drive within the same unRAID.
October 10, 201015 yr If it matters, this is using OS X to do the transfers and not via command line in unRAID. It matters. You are copying the data twice: unraid -> OS X client, OS X client -> unraid. Use the command prompt or midnight commander to remove the client piece; it will be faster going unraid -> unraid.
October 11, 201015 yr Author Okay, I can understand if its 2x the time, but my low estimate of 2x is not very often as it's typically much more than that; more like 3-4x. Which is why I now transfer to Mac, then transfer to the other unRAID drive.
October 11, 201015 yr Okay, I can understand if its 2x the time, but my low estimate of 2x is not very often as it's typically much more than that; more like 3-4x. Which is why I now transfer to Mac, then transfer to the other unRAID drive. Do you have GE network?
October 22, 201015 yr Author I wasn't sure if unRAID ensure parity drive is kept updated when moving files between drives via the command line.
October 22, 201015 yr I wasn't sure if unRAID ensure parity drive is kept updated when moving files between drives via the command line. Absolutely it does keep parity updated when using the command line. Use "mc" and you'll get much better speeds. Remember though when transferring a 5GB ISO image from one disk to another you are reading 5GB from the source disk, reading 5GB from the target disk, reading 5GB from the parity drive.. and then writing 5GB to the parity drive and writing 5GB to the target drive. Do not expect it to be super fast when you are moving 25GB of data around. If you have an PCI bus based server you might be limited by the I/O bandwidth of the bus. (as on my older server) Joe L.
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