Re: Postgresql 9.0.6 Raid 5 or not please help.

> I'm not so confident that a RAID-1 will win over a single disk. When it
> comes to writes, the latency should be ~50 higher (if both disk must
> sync), since the spindles are not running synchronously. This applies to
> softraid, not something like a battery-backend raid controller of course.
>
> Or am I wrong here?
>

Software RAID-1 in Linux, can read data in all disks and generally
increase a lot the data rate in reads. In writes, for sure, the overhead
is great compared with a single disk, but not too much.