raid or not raid

[illoai at gmail.com]

On 24/05/07, Derek Ragona <derek at computinginnovations.com> wrote:
> At 05:30 AM 5/24/2007, kalin mintchev wrote:
>
> >so nobody on this list knows anything about raid?
> >wrong list?
> >
> > > hi all..
> > >
> > > i have a box in a remote hosting facility that claims that the machine has
> > > two discs raided in it but df and fstab show only one disc with a bunch of
> > > slices.
> > > under devices there is another name - ad6 - but it's not mounted anywhere.
> > > the one i see both in df and the fstab is ad4 with one big slice and
> > > different partitions....
> > >
> > > they insist there are 2 raided discs in tha machine. the os is 5.4 and i
> > > think at that point the raid drivers were still considered 'experimental'.
> > >
> > > it makes sense to me that if i don't see a second drive in the fstab there
> > > isn;t any mounting which means that there is no raid going on...
> > >
> > > is there any other way i can make sure if raid is actually on?
> > > would there will be any logs somewhere?
> > > the machine has been up for about 2 years and the dmesg is long gone...
> > >
> > > thanks.....
> > >
> > >
>
> It is likely a hardware raid setup in the hardware BEFORE FreeBSD was
> installed.  In this type of setup the RAID array just looks like a regular
> hard disk to the OS.
>

Now I'm curious: are there RAID controllers that FreeBSD
just sees as a [S]ATA controller with a [S]ATA disk attached?


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