hi root...
since no one else replied yet... i'll give it a whirl...
not sure which is better...
megaraid, extremraid or adaptec...
i say it depends on the distribution...
which distro supports which raid card...
- if the installer does not support that hardware...
it'd be awfully difficult to install linux...
- above assumes you are doing root raid5...
- simpler ( imho ) if you install linux on a disk...( regularly )
and backup that system disk to another disk...
- if the system disk crashes...all your data on raid5 is
unaffected
- just swap out the dead system disk with the other
disk that is on standby .. and you're back in a few minutes...
- if you install raid5 on 3 disks.... i dont think you can go
and make it 5 disk raid5 later.... parity would be messed up
to rebuild the "new disk"... in this case 2 of um...
- if 2 disks dies out of 5 disk raid5...you're hosed...
==
== check which distro supports which raid hardware controller...
== or at least a way to install the "driver" during linux install time
==
have fun
alvin
http://www.Linux-Consulting.com/Raid
On Wed, 25 Apr 2001, root wrote:
>
> Hello,
>
> I am building a brand new server box and would like some input by the
> experts on what hardware to buy. The box will be a Supermicro 370DE6,
> with dual PIII-1GHz, running Linux kernel 2.4.x
>
> I was thinking of going with the new Seagate Barracuda 180s in a RAID 5
> setup. 5 drives (+ 1 parity drive) gets you 900GB of disk space for about
> $10k. They are thick bastards, but I don't need hot-swap, etc.
>
> How much benefit would there be getting the 16MB cache version versus the
> 4MB cache?
>
> I have been digging around in archives, etc, but can't decide which
> hardware raid controller will be the best for Linux. The options for U160
> multichannel hardware RAID seem to be the Mylex ExtremeRAID 2000, the
> Adaptec 3400S, and the AMI MegaRAID (Elite/Enterprise 1600). I won't have
> time for constant tinkering, so mature hassle-free drivers and support
> software is probably my number one concern.... any hints for me? The
> motherboard supports 64bit/66MHz PCI, btw.
>
>
> And, from the what-a-newbie column, maybe someone can help me out here:
> If I buy 3 HDs now, and put them together in a RAID5, can I simply add 3
> more drives later on? I don't neccesarily want to resize the existing
> partitions, but rather to be able to add new ones within the RAID. It
> seems like this would be a common thing, but I seem to recall an email
> saying this is problematic.
>
>
> OK, thanks for your time,
> Doug (shamelessly posting as root)
>
>
>
>
>
>
>
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