> -----Original Message-----
> From: Michael [mailto:[EMAIL PROTECTED]]
> Sent: Friday, March 31, 2000 11:15 AM
> To: [EMAIL PROTECTED]
> Subject: RE: root on RAID
>
>
> > > RedHat Linux 6.1 has the following warning:
> > > The installation of Red Hat Linux's root partition onto a
> > > RAID device is not supported.
>
> > I don't know why they say this, seems a little silly to me. I've
> > got ROOT installed on both hardware and software RAID here, works
> > fine.
> >For software RAID, I'd advise against anything other than
> > RAID1 (mirroring).
>
> Just out of curiosity, why do you advise against?? I have maybe a
> half dozen systems running root - software raid, some for serveral
> years -- including some disk failures. I have combinations of raid5
> raid1 and raid 10 running as root on different hosts using both 0.42
> and 0.90 tools/raid
Mostly because it's (pardon my French) a bitch to recover from. RAID5 and
RAID0 use striping across multiple disks, which makes manual recovery of
data a real pain. RAID1 just has two copies of the data, making it real
easy to just turn off one disk, and run from the other. Running a mirror of
stripes (that is, two stripe sets, mirrored)(RAID10) is ok for recovery
(although still not as easy as a plain mirror), while a stripe of two
mirrors (RAID01) is a real pain to recover from. Mostly this applies to
software RAID, not to hardware RAID, because I haven't tried (or needed to)
recover from a hardware raid software failure (uhm, where the "software" on
the RAID controller FUBARs). Software RAID is kind of fun to see if I can
break. :-)
Greg
