Re: cciss vs IDE (was: lvm with raid)
On Sat, 3 Jul 2004 17:16:00 +1000, Russell wrote in message
> On Fri, 2 Jul 2004 16:22, Michael Loftis <email@example.com> wrote:
> > > If you have a hot-spare disk in the machine then you can have it
> > > take the place of a disk that dies while the machine is running
> > > and then replace the defective hardware during a scheduled
> > > maintenance time.
> > Except that in my experience a dead IDE drive takes the whole system
> > with it even with MD RAID, the system just locks up. (yes even on
> > say three'independent' channels).
> That hasn't been my experience, maybe I haven't had a drive die in th
> right way. All the disk failures I have experienced have had read
> errors be the only symptom.
> It's expected that a drive electronics failure will take out any other
> drives on the same cable. If a drive starts drawing excessive current
> then it can cause the entire system to hang (lack of power for the CPU
> and other devices), but I wouldn't imagine that to be common.
> Maybe you encountered a bug in the device driver or the hardware? In
> either case it would be interesting to repeat the test and file bug
> reports if it appears to be kernel code.
> > YMMV of course...I've kind of thought about doing another experiment
> > here lately I've got a handful of older drives at home that I've
> > thought about trying failure scenarios (c'mon, don't tell me you're
> > not the least bit interested in taking a ball peen hammer to a drive
> > in a running system!!!)
> Good idea! Go for it!
> Please make sure you have a camera that is capable of at least 2Mp on
> hand to put pictures of this on your web site!
..med vennlig hilsen = with Kind Regards from Arnt... ;-)
...with a number of polar bear hunters in his ancestry...
Scenarios always come in sets of three:
best case, worst case, and just in case.