Re: setting up a recovery-friendly Linear RAID
hi ya corey
On Sat, 3 May 2003, Corey Hickey wrote:
> I have a few large disks that I'd like to combine into one really-large
> volume. The data that will go on this volume isn't so important that I
> need to keep it backed up instantly, so I don't want to use RAID 4 or
> RAID 5. I would, however, like to be able to recover data off the other
> disks should one of them fail (the files on the failed disk will be gone
> forever, but I want to be able to retrieve the rest). Hence, RAID 0 is
> out too.
raid0(stripping) does NOT provide any protection against disk failures
- just makes lots of small disks look like a bigger one
> I'm familiar with Linear RAID, and that would seem to suit my purposes.
> However, I don't know what kind of filesystem I should use such that I
> will be able to recover from one of the disks failing. I'm partial to
> ReiserFS, but perfectly willing to try out something else that would
> work well.
filesystem will NOT protect you against any disk failures
if you want to protect against disks failures and NOT lose any data,
you need raid1(mirror) or raid5 ( raid2-4 is sorta obsolete )
to prove to yoruself, before disaster strickes, you should disconnect
and similate disk failures by leavingone of the disks discconected
and the system should be able to power up and reboot all by itself
into degraded mode
if you really do not want to lose data, you should backup all data
to another system
more raiding
http://www.1U-Raid5.net
c ya
alvin
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