Linux ATA RAID

[Steven Hildreth]

You can do this with LVM. You cannot resize the array with the 3ware
utility without losing the existing partition.

We put each four drives on its own array (each array being RAID 5), then
LVM all the arrays together. This way we can add or subtract drives
(array at a time) via the LVM management software.

HTH,
Steven

-----Original Message-----
From: owner-kclug at marauder.illiana.net
[mailto:owner-kclug at marauder.illiana.net] On Behalf Of Charles
Steinkuehler
Sent: Wednesday, March 05, 2003 8:33 AM
To: Bill Cavalieri
Cc: kclug at kclug.org
Subject: Re: Linux ATA RAID

Bill Cavalieri wrote:
> Charles Steinkuehler wrote:
> 
>> I'm debating using SCSI drives vs. buying a hardware RAID and using 
>> cheaper IDE drives.  I have fast/wide PCI slots available, so I'd 
>> prefer a fast-wide hardware IDE raid card, but performance is really 
>> secondary to data integrity and low-cost (it's not a perfect world, 
>> after all!).
> 
> I had the same quandry last week, I have a server dishing out remote x
> connections, and had 30 clients conntected.  With the ide drives the x

> server came to a halt.  I looked at scsi and ide raid, after lots of 
> reading, and looking at the budget, I settled with an ide raid 
> controller from 3ware.
> 
> Its a  4 channel, hardware raid controller (more than just doing the 
> xor
> on card, like promise etc..), used 4 drives in raid 10, so I got 
> performance and security and a cost of drive space.  I know how 30 
> connected clients, and server is working just fine.

Thanks for the tip!  This looks like a better solution than the Adaptec 
card, since I can get 8 and 12 drive versions.

Do you know if it's possible to add drives to an existing array?  I'd 
like to be able to start with a 4 or 5 disk RAID5 array, with the 
ability to add another couple drives when the marketing dept. fills up 
the space with cruft. :)

I'm crawling through their online docs, but there's nothing like having 
been through an actual install.

-- 
Charles Steinkuehler
charles at steinkuehler.net