Re: [GENERAL] server hardware recommendations (the archives aredead)

Ed Loehr wrote:
> Jeff Hoffman wrote:
>
> > ...i have seen several places which told me
> > that software raid under linux _isn't_ safe for multiprocessors & no
> > place has told me for sure that it is.
>
> Would you mind clarifying your understanding on which versions of linux are unsafe
> for software raid and how? Browsing deja, RH 6.1 (2.2.12-20smp) reportedly handles
> software raid without known problems (other than less than glowing documentation
> reviews), and I'm setting up pgsql/apache on such a system with software raid (no
> clear showstopping problems yet).

i'm not running RH6.1, but i am using a 2.2.12 kernel (compiled myself)
and like i said, no catastrophic problems. the problems, i believe,
came up with a conversation about an earlier 2.2 version of the kernel
and it may have included problems with adaptec SCSI controllers in
conjunction with software raid on SMP systems. i don't remember where i
found the references, though. i believe the adaptec 7880 driver was
fixed by 2.2.10, and there were a bunch of SMP fixes between 2.2.6 -
2.2.10, so 2.2.12 is probably as safe as anything. you never hear about
things that work, just about things that don't.