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Slow move/copy between disks in array without parity on!

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Hi everybody,

 

This weekend I've build my first unraid server and things are working well. I can access my movies with my Mede8er mediaplayer and I'm pleased.

 

But, at this moment I've no parity drive installed, just two data drives and I was trying to copy files from disk2 to disk1 and reverse.

 

I do this with the putty telnet commandline: cp -r /disk1/movies/* /disk2/movies and things are going fine. Then I was looking (with unmenu) to the read/write information and I could see that the a maximum speed was about 25-28 MByte read and also (approx.) write.

 

How is this possible with no parity on, using the onboard sata controller of my Asus M4A78LT-M board, using a spinpoint 750 GB and a WD EACS 1 TB drive?? I thought the speed should be much higher??

 

CPU: Sempron 140

Mem:2 GB

No parity

No NZB apps etc etc.

 

If someone can help me please respond!

 

Kind regards,

 

Erwin

 

Hi everybody,

 

This weekend I've build my first unraid server and things are working well. I can access my movies with my Mede8er mediaplayer and I'm pleased.

 

But, at this moment I've no parity drive installed, just two data drives and I was trying to copy files from disk2 to disk1 and reverse.

 

I do this with the putty telnet commandline: cp -r /disk1/movies/* /disk2/movies and things are going fine. Then I was looking (with unmenu) to the read/write information and I could see that the a maximum speed was about 25-28 MByte read and also (approx.) write.

 

How is this possible with no parity on, using the onboard sata controller of my Asus M4A78LT-M board, using a spinpoint 750 GB and a WD EACS 1 TB drive?? I thought the speed should be much higher??

 

CPU: Sempron 140

Mem:2 GB

No parity

No NZB apps etc etc.

 

If someone can help me please respond!

 

Kind regards,

 

Erwin

 

We have no idea... since you did not attach a syslog to analyze for any possible errors.  It could easily be that slow for some disks on some disk controllers, especially if operating in legacy mode.

 

To test the actual disk read speeds, type:

hdparm -tT /dev/[hs]d?

 

 

  • Author

Hi Joe L.,

 

Hereby the results of the jury:

 

sda: cached  2340,87 MB/sec

sda: buffered 84,76 MB/sec

 

sdb: cached 2364,02 MB/sec

sdb: buffered 94,82 MB/sec

 

sdc: cached 2255,45 MB/sec

sdc: 16,86 MB/sec

 

Can I conclude that the sdc is the flashdrive and the others (sda and sdb) are functioning well??

 

sda is the Spinpoint and sdb is the WD green drive.

 

Erwin

  • Author

Hi everybody,

 

Is there anybody who can help me solve the disk performance problem??

 

Kind regards,

 

Erwin

I still don't see a syslog.

  • Author

Hi All,

 

I've only added the results of the drives because I don't know where to find the sys.log and what info you guys eally need.

 

Kind regards,

 

Erwin

Hi All,

... I don't know where to find the sys.log and what info you guys eally need.

 

Kind regards,

 

Erwin

 

How to "Capture your syslog"

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