Skyclad wrote:Hi there,
I do not know if you guys have had this problem, but it is the second NAS with the Virtual Array rebuilt by UFS that the copy operation on destination drive is terribly slow (about 460GB in 24 hours).
These the parameters: parity rotation (left asynchronous), stripe (1 sector). I have used a place holder as one drive was dead. File system is Hfs+.
I think it's a problem with stripe and UFS. I have to copy about 6TB of data, and with this transfer it “takes a lifetime”.
My workstation consist of a Mainboard Supermicro X10SAT, and a controller LSI (Avago) 9300-8I. I must say also that most of the files are 4K big movies.
I'm thinking about a solution but the customer is already complaining about the long time.
Thanks for any hint
Amarbir[CDR-Labs] wrote:Source of the post This is what i do "I call the customer who is having no time and make him sit infront of the computer thats actually doing the job".After 30 minutes to an hour they go back and never call until task is finished
Jared wrote:Source of the post Somehow though the hardware is able to do this full speed, probably because it's a simple solid state relay just flipping a switch every 512 bytes. It's software which takes forever to do this due to the fact that it's likely making a separate ATA request for each individual sector now instead of reading in blocks. Eventually, one of the programs (hopefully R-Studio) will wise up and add in a RAM drive buffer to work from so it's prebuffering the sectors and destriping just from RAM.
lcoughey wrote:Kind of ironic, isn't it. Smartstore isn't very smart, using 1 sector block sizes.
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