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DPM 2016 UR4 Very slow tape backups to LTO7 (3.4TB in 14 hours??) RRS feed

  • Question

  • We have an LTO 7 NEO overland tape library 24 slot system..

    I started a quarterly tape job to the unit yesterday at 130pm.. 14 hours later it shows 1 tape (compression on) at around 3.7 TB (out of around 10TB)..

    This seems painfully slow and wrong?

    Can anyone comment on what this should be taking or why its so slow?

    Thanks in advance


    Tech, the Universe, Everything: http://tech-stew.com Just Plane Crazy http://flight-stew.com

    Wednesday, February 28, 2018 4:28 PM

All replies

  •     Might try February's 22 commutative update (https://support.microsoft.com/en-us/help/4077525/windows-10-update-kb4077525)  it seems to be fixing slow HD access for a lot of people.  If your running server 2016 of course :).  
    Wednesday, February 28, 2018 11:19 PM
  •     Might try February's 22 commutative update (https://support.microsoft.com/en-us/help/4077525/windows-10-update-kb4077525)  it seems to be fixing slow HD access for a lot of people.  If your running server 2016 of course :).  

    Thanks.. ill give that a shot.. though.. i think its averaging about 400 gbps.. which i think is around 110 MB/sec.. its coming from a raid 6 array that is pretty fast though.. one would think it would be faster. 


    Tech, the Universe, Everything: http://tech-stew.com Just Plane Crazy http://flight-stew.com

    Wednesday, February 28, 2018 11:57 PM
  • RAID 6 is not recommended for DPM.  Something about the extra parity slows it down.  This was given to me by a dpm microsoft tech.  Might want to create a small raid 5 and see if that is any better. 
    Monday, March 5, 2018 6:03 PM
  • RAID 6 is not recommended for DPM.  Something about the extra parity slows it down.  This was given to me by a dpm microsoft tech.  Might want to create a small raid 5 and see if that is any better. 
    We actually get very good performance on raid 6, i ran some benchmarks.. this is the first i had heard of this though.

    Tech, the Universe, Everything: http://tech-stew.com Just Plane Crazy http://flight-stew.com

    Monday, March 5, 2018 7:39 PM