Tuesday 18 June 2013

BMC - RLM - SP


  1. BMC - RLM - SP is console port to connect the filer,
  2. BMC - RLM - SP is a separate device in the FAS chassis.
  3. It has it's own IP and is independent of the FAS so it keeps running any time.
  4. BMC - RLM - SP is connects to the motherboard and install separately.When a FAS fails over BMC - RLM - SP keeps working locally.
  5. These provide remote support like remote access, monitoring and troubleshooting.




Before FAS 2xxx they called BMC

FAS 2xxx to FAS 30xx / 31xx they called RLM

After FAS 3240 and 3270  they named SP (service processor)




BMC : Baseboard Management Controller

RLM : Remote Lan Module

SP : Service Processor



RLM - Remote Lan Module






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Tuesday 4 June 2013

CIFS Oplocks - Opportunistic Locks

CIFS Oplocks - Opportunistic Locks

CIFS Oplocks

  • CIFS oplocks reduce network traffic and increase the storage performance.
  • Its working like caching of read-ahead, write-behind, and lock information.
  • you can enable/disable CIFS oplocks for the individual volume or qtree.
  • In the database application we should turn off the CIFS oplocks 
  • when you handling critical data and can't afford the data loss.
  • Otherwise, you can on  CIFS oplocks options.

Enabling/Disabling for entire storage 

> cifs.oplocks.enable on
> cifs.oplocks.enable off


Enabling/Disabling for qtrees qtree oplocks /vol/vol2/proj enable

> qtree oplocks /vol/vol1/qtree enable
> qtree oplocks /vol/vol1/qtree disable









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