• Storage & Archiving

  ATTO R608 RAID6 slow read&write speed

  Posted by Razvan Dimitriu on January 16, 2019 at 12:23 pm

  Hello!

  I just replaced my LSI raid controller with an ATTO, mainly to get MacOS compatibility, as I’m running a dual boot machine.

  I have 7 Seagate Barracuda 4TB drives connected to the ATTO R608.
  Read and write speeds on RAID6 do not go higher that 450MB/s, while in RAID0 they get to about 1100MB/s.
  I remember that on the LSI, speeds on RAID6 were at about 900MB/s.

  My settings are: RAID 6 | Interleave: 512 | Sector Size: 512 | SpeedRead: Always | Prefetch 3.

  In the BIOS Config tool, I chose ‘Express Initialization’, and not ‘Advanced’. Initialization is still running in the background and it’s really slow! I don’t remember it taking so long on the LSI.
  Can the initialization process be the cause for the slow speeds or maybe I’m missing something else?
  It’s just that it’s so slow and experimenting would take forever 😐

  Thank you!

  Razvan Dimitriu replied 7 years, 3 months ago 3 Members · 3 Replies
• 3 Replies

• 

  Bob Zelin

  January 16, 2019 at 1:11 pm

  That’s why I use Areca hardware RAID cards now. The ATTO initialization process is about 24 hours. The Areca is about 30 seconds. The Highpoint RocketRaid is also about 1 minute.

  Bob Zelin

  Bob Zelin
  Rescue 1, Inc.
  bobzelin@icloud.com
• 

  Alex Gardiner

  January 19, 2019 at 1:41 am

  [Razvan Dimitriu] “Can the initialization process be the cause for the slow speeds or maybe I’m missing something else?
  “

  If the ATTO is anything like your LSI, user generated IO will push initialisation into the background. Even then, benchmarks are going to be impacted until init completes. On an LSI you can usually set the “BGI Rate”.

  Either way I would suggest running the test again once the process completes…

  Remember that without init you can’t be sure your drives are in a good state. Same goes for Consistency Checking (ATTO call this ‘media scan’). I would suggest scheduling this fortnightly for early on Saturday morning. To an extent the frequency depends on type of drives used/capacity/working hours.

  alex@indiestor.com
• 

  Razvan Dimitriu

  January 22, 2019 at 2:49 pm

  Thanks guys!
  Indeed, after initialization completed, speeds are ‘normal’ I guess – 850MB/s.
  Still a bit lower than the LSI, but acceptable.
  Best from Bucharest!

  Colourist
  https://postlight.ro/

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