[asterisk-dev] possible zaptel problem with SMP and RAID1

[Benny Amorsen]

>>>>> "c" == critch  <critch at basesys.com> writes:

c> Your problem is going to be related to sysadmin work. You shouldn't
c> run software raid on the machine doing asterisk. RAID1 just makes
c> your life worse, you are being required by kernel level code to
c> write everything to disk multiple times. Once for every disk in the
c> RAID1. My guess is you have a SATA1 drive set, or possibly a poor
c> SATA controller. When combined with software RAID you are getting
c> hung up in some kernel code somewhere and by the time asterisk can
c> service the channel again you have lost audio.

The overhead of software RAID, and in particular software RAID 1, is
negligible. Sure, a bad disk controller could slow you down, but that
would slow you down with just one disk as well.

Anyway, the -rt patches can be used for improved kernel realtime
behaviour.


/Benny