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MvL

Is copy speed to slow?

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I have a chassis with a expander backplane it's connected to a LSI 9207-8i (dual link). All drives are 10TB Ironwolf's. If I copy a file from one disk to another via the terminal with mc my speeds are avg 110MB/sec (/mnt/disk1/movies --> /mnt/disk2/movies). I have no parity drive installed at the moment. I have feeling that this is to slow but I'm not sure. Please some help from a expert.

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That sounds like a perfectly normal speed for copying disks!   Not sure why you think it should be faster!

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That sounds like a perfectly normal speed for copying disks!   Not sure why you think it should be faster!

Sounds slow if you have no parity. My ironwolf 6TB drives do 150mbps easily and consistently.

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32 minutes ago, itimpi said:

That sounds like a perfectly normal speed for copying disks!   Not sure why you think it should be faster!

 

110MB/sec is network speed on a gigabit network. Sata 600 is much faster. It's faster as the HDD. I copy a large file from HDD to HDD. If I'm correct the 10TB Ironwolf's do read (sequentieel) 210MB/sec I'm not sure what they do when writing. That is why I'm asking.

 

25 minutes ago, glennv said:


Sounds slow if you have no parity. My ironwolf 6TB drives do 150mbps easily and consistently.

 

If I'm correct 100 -110MB/sec with parity drive is normal. True?

Screen Shot 2018-06-02 at 08.58.44.png

Edited by MvL

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With parity seems normal yes . Just did a test on mine with all array(5)/parity(1) a 6TB ironwolf drive and getting 121MB/s so close enough

Edited by glennv

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I tested copying files from hdd to hdd  witch are mounted with Unassigned Devices and I can say these copy speeds are faster. The speeds are around 200Mb/sec. So I suspect that the array thinks that there still is a parity drive and that is the reason why I see speeds of around 100Mb/sec coping from hdd to hdd witch are mounted to the array. So to be clear there was a parity drive some time ago but not at the moment but the copy speed of the array from hdd to hdd are still around 100Mb/sec. Not sure if this is normal behaviour or a bug...

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7 hours ago, MvL said:

So I suspect that the array thinks that there still is a parity drive

That's impossible, either there is parity or there isn't, though the disks being part of the array might have an effect on performance, due to different settings and/or other options made my LT in the way they mount or operate..

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