Transfer Speed on Disk to Disk Copy

[dboonthego]

I'm converting my FS from Reiser to XFS. I kicked off a disk to disk copy of disk1 to disk3 using

rsync -avPX /mnt/disk1/ /mnt/disk3/

which took 10.5 hours to complete.

Before executing the copy, I unassigned the parity disk to help increase the write speed.

 

My math:

Disk 1 reports a used size of: 1,994,207,632,134 bytes

Divide 1,994,207,632,134 by 1,000,000 ~ equals 1,994,207 Megabytes

10.5hours * 3600 = 37,800 seconds

1,994,207MB / 37,800sec = [glow=red,2,300]52.76MB/s[/glow]

 

52MB/s is inline with the average transfer speed on the OSD, but I expected this to complete much faster with parity disabled.  Is my expectation unreasonable?

 

I know speeds can vary across different hardware so here is mine:

• Disk1: WDC-WD20EARX 2TB 5400RPM (green)  <-- source
  
• Disk3: WDC_WD20EZRZ 2TB 5400RPM (blue)  <--destination
  
• Mobo: ASUS Z170M-PLUS
  
• CPU: Intel Celeron G3900 2.9GHz
  
• unRAID v6.2.4
  

 

[JorgeB]

Sounds about right, maybe a little on the slow side, rsync is not the fastest way to transfer, also depends on the average file size.

 

Last time I did that, also without parity it was about 4 Hours per TB, mostly large files.

[dboonthego]

Anything I can check out to see why it is on the slower side?  All my stuff is new except for disk1 which is about 3-4 years old.

[JorgeB]

If you have mostly large files disk1 is probably the main reason for it being a little slower, it probably has 500GB or 667GB platters, next one should be a little faster if both disks involved are 1TB/platter.