software raid will NOT save you from power failure. it will save you from
disk/controller/cable failure only! do NOT lull yourself into a false sense of
security.
if you have a people who cant handle unix and powering down, then you need an
UPS and lock your box in a closet.
linux software raid uses partitions, not disks as its slices, so it does not
matter if your disks are not all the same size, if you make the partitions the
same size.
what you do depends on your application, but i would definately move one of
those ide disks to its own bus, even if i was not going to raid. probably the
4 gig scsi is a good investment, since the different controller/cabling from
the ide disks should provide better redundancy.
allan
Micah Anderson <[EMAIL PROTECTED]> said:
>
> I have got a machine that nearly coughed up blood yesterday because
> someone pulled the power on it. The fscks were nasty, let me tell you that
> I am happy for backup superblocks. Anyways, that was too close, I need a
> RAID solution in this weekend, or I am going to panic.
>
> The problem is the hardware I have available is haphazard PC hardware. You
> know what I mean.
>
> Currently being used on the machine I've got:
> hda: WDC AC22100H, 2014MB
> hdb: WDC AC31600H, 1549MB
>
>
> Available to kludge together a RAID system are various pieces of useful
> hardware. Three 1 gig and a 4 gig scsi drives are available. I've got a
> bunch of 540s, which considering their size are probably old and not worth
> the hassle. I can pick up something else if it comes down to that, but it
> would be great if I could use what I have.
>
> Can I take these random drives and make them into something that I can
> rely on? Do I need to have drives that are exactly the same size as the
> drives that I want to mirror, or can I take a couple here, a couple there
> and make them useful?
>
> Thanks!
>
>
