Author Topic: Backup  (Read 222 times)


  • Calf
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« on: June 14, 2018, 07:47:06 am »
Has anyone got any idea how long backup to external HDD via USB should take?  I'm backing up a 2TB NAS with just under 500GB of data onto a 1TB USB3.0 HDD, the backup has been running for over 24 hours now, this seems a long time. 

How long should it take?



  • The Oxy-genuine article
  • El Toro
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Re: Backup
« Reply #1 on: June 14, 2018, 03:22:54 pm »
my test with LS-QVL

64GB USB Fat32

writing to usb 21MB/s

Code: [Select]
# sync ; time sh -c "dd if=/dev/zero of=/mnt/usbdisk2/testfile bs=100k count=10k  && sync"
10240+0 records in
10240+0 records out

real    0m46.738s
user    0m0.030s
sys     0m4.950s

copying from usb to Raid5 with 23MB/s

Code: [Select]
sync ; time sh -c "cp /mnt/usbdisk2/testfile /mnt/array1/share  && sync"

real    0m42.608s
user    0m0.170s
sys     0m4.970s

1. which nas do you use?
2. which filesystem do you use on the usb device