raid3 is slow

[Szabó Péter]

----- Original Message ----- 
> From: "Dag-Erling "Smørgrav"" <des at des.no>
>

> Szabó Péter <matyee at mail.alba.hu> writes:
> > # graid3 list
> >
> > Geom name: nmivol
> > State: DEGRADED
>
> First of all, your array is degraded.  The graid3 output shows only
> four components.  Unless the missing fifth component happens to be the
> parity disk, geom_raid3 will have to reconstruct your data on the fly.
>
> Second, you say nothing about which spindles the components are on and
> how those spindles are attached to the system.  If some of those
> components are on the same spindle, or if some of those spindles are
> on the same ATA channel, performance will suffer considerably.


Array problem solved. But my problem is not the low read/write performance, 
my problem is the high load. I start a single bittorrent download to the 
encoded raid3 partition with 2.5MB/s speed, and the load is 2.5.

Matyee