Re: Controller trashes FS (what's new)
H. Peter Anvin (hpa@transmeta.com)
29 Jan 1997 20:25:20 GMT
Followup to: <5cldgc$iik@pell.pell.chi.il.us>
By author: o.r.c@p.e.l.l.c.h.i.i.l.u.s (david parsons)
In newsgroup: linux.dev.kernel
>
> >It was my understanding that you must re-format your
> >drive when switching SCSI controllers.
>
> It depends on the controller and (I think) if you've enabled any
> scheme for DOS >1gb addressing. I pretty routinely shuffle disks
> between a variety of BusLogic 94[68], Adaptec 2940, Adaptec
> 154[02][BC[F]] and NCR 810 controllers and don't recall ever having
> any trouble with them. The caviat is that the boot disks are almost
> always <1GB in size and I nevernevernever enable the DOS translation
> on them.
>
> The 'Controller trashes FS' problem sounds like a problem I had a
> couple of years ago where I was drawing too much power from the
> power supply, and when something heavy-duty kicked in disks would
> start dropping offline, with hilarious consequences.
>
Note: Under Linux it doesn't really matter; you can change the
controller even if the pseudo-geometries are different; the only harm
is that fdisk complains and you have to reinstall LILO (sometimes not
even that, if you use the "linear" option in /etc/lilo.conf).
-hpa
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