Re: Debian on a RAID How do I?
hi ya daniel
running root on raid5 is tricky stuff...
- i think is a bad idea... ( just silly me )
-
- if you lose your system... you also lose data...
-
- if data is on raid5... if the system dies...
- you can still recover and continue with a new system disks
- within minutes or within the hour
-
- if you lose data...who knows how long it'd take to restore
- the 100's Gb of data
-
- 3 disks at 80Gb is 240Gb of raw space... 160Gb of raid5
3 disks based raid5 is in-efficient...
a 2 disk raid1 ( mirroring ) is 1/3 as expensive
and does almost an identical function of maintaining
data while only one disk dies in 3-disk raid5 or 2 disk mirror ??
running raid5 on just data is fun enough already...
for dpt-2100S... dpt is typically supported...
but which distro and which kernel might affect "it's supported"...
- try it and see what happens
- search google for "raid dtp 2100s" and
see what others had already done
- do lots of experiments before committing data that is not yet
backed up elsewhere... even if raid5 is working....backup data
to a different system in either case
- final "qa" test....
- pull the power cord while the system is writing data to disks
( well okay...pull the network cable... almost as good of a test )
have fun raiding
alvin
http://www.Linux-Consulting.com/Raid -- collection of raid stuff
On Sun, 8 Apr 2001, Matthew Sackman wrote:
> On Thu, Apr 05, 2001 at 10:58:45PM +0200, Daniel de los Reyes wrote:
> > We are planning to by a server with 3 scsi drives and a dpt 2100s raid
> > controller.
> > I am quite confused about how I should set the thing up to get Debian
> > running.
> > Will Potato's boot disks recognise the raid controller?
> > If I use the three drives in a Raid5 array can I boot off it?
> > Should I have a forth drive to install and boot from it and use the raid
> > array for var, home and such?
> >
> > Could somebody please light a torch over me?
>
> The only hardware raid controllers that are built into the stock debian
> kernels (as used when installling debian) are the mylex raid controllers.
>
> If you've got one of those the you're laughing: just find every god damn
> howto you can which is about hardware raid and booting and all the other
> problems associated with it.
>
> If you've not got a mylex raid controller then I can only suggest you
> install onto a bog standard ide disk, set up to compile a new kernel,
> patch that kernel with the drivers for whichever raid controller you are
> using and then compile and install your own kernel.
>
> The pray again.
>
> Hope this kinda helps....
>
> Matthew
>
> --
>
> Matthew Sackman
> Nottingham,
> ENGLAND
>
> Using Debian/GNU Linux
> Enjoying computing
>
>
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