[TCLUG] Promise ATA/Raid

Thu Jun 13 15:55:53 CDT 2002

> -----Original Message-----
> From: tclug-list-admin at mn-linux.org
> [mailto:tclug-list-admin at mn-linux.org]On Behalf Of Doug
> Sent: Thursday, June 13, 2002 2:01 PM
> To: tclug-list at mn-linux.org
> Subject: RE: [TCLUG] Promise ATA/Raid
> 
> 
> So if I mirrored 2 drives linux would still see 2 drives instead 
> of one? 

Yup.

> Well I guess seeing 4 more ide devices (up to anyway) is 
> better than nothing. And in doing that have you noticed any 
> performance loss?
> 

Nope.  There probably is some overhead, but I can't measure it -- in fact, the system seems a touch faster, probably because of the use of multiple drive buffers on the mirrored drive.

> Thanks for the info...
> 
> Doug
> 
> 
> -----Original Message-----
> From: tclug-list-admin at mn-linux.org
> [mailto:tclug-list-admin at mn-linux.org]On Behalf Of Joel Rosenberg
> Sent: Thursday, June 13, 2002 1:23 PM
> To: tclug-list at mn-linux.org
> Subject: RE: [TCLUG] Promise ATA/Raid
> 
> 
> I have.  Basically, what you do is set up a RAID partition when 
> booting the system -- doesn't matter which kind, although it's 
> slightly easier to set up what the BIOS thinks is a striped 
> partition -- and then ignore it.  Linux doesn't see the RAID 
> drives as RAID drives, but as ordinary partitions.  Then it's 
> just a matter of setting up the software RAID in Linux itself, 
> and choosing which file system you want to use.  (I'm using ext3, 
> and have yet to have any fsck problems, even though I've had to, 
> on a couple of occasions, hit the reset button.)
> 
> Overhead is apparently small, and Linux supports more kinds of 
> RAID than the Promise chipset does, anyway.  (Right now, I've got 
> my / and /home directories on mirrored partitions, and my /var 
> directory on a striped one.)
> 
> 
> -----Original Message-----
> From: tclug-list-admin at mn-linux.org 
> [mailto:tclug-list-admin at mn-linux.org]On Behalf Of doug
> Sent: Wednesday, June 12, 2002 5:52 PM
> To: tclug-list at mn-linux.org
> Subject: [TCLUG] Promise ATA/Raid
> 
> 
> Hey is anyone successfully using that chipset in a raid 
> configuration in Linux? I have an MSI board with an AMD 1.4ghz 
> and the board has the promise 20265 lite chipset on it. (Link to 
> the board below) Since win2k server has decided it doesn't want 
> to be on there anymore I'd like to put RH 7.3 on it, and I'd like 
> to mirror 2-40 gig drives with it. I seem to remember reading 
> somewhere awhile ago that linux can see the raid chipset, but you 
> can't actually raid any drives. Can anyone shed any light? 
> 
> http://www.msicomputer.com/product/detail_spec/product_detail.asp?
model=K7T_266_PRO-R 

Thanks 

Doug 

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