Quoting Shachar Shemesh, from the post of Sun, 04 Jun:
> > Take note, amigos! If you buy an IBM server with an Adaptec ServerRAID
> > onboard, you may find that even after initializing the mirror, your
> > Linux will STILL see two LUNs! aic7xxx drivers are very stable with it,
> > but they lack the ability to work with the RAID. to do that you have to
> > ask a controller with the HostRAID(tm) option, that means another slot
> > in the PCI taken, and a few hundred bucks, only then you can download
> > the OSS driver a320 from the Adaptec site and get to see just one LUN.
> >   
> The story you tell here is 180 degrees reverse from what I know. The
> HostRaid needs the crummy binary only a320 driver that is only really
> compiled for RedHat kernels, while the ServerRAID driver (which fits
> into a dedicated slot, not a PCI slot, there is nothing else that CAN go
> there besides a RAID controller) uses the open source IPS driver.

umm, the ServeRAID drivers are on IBM's site, binary only. If you search
for drivers from the main page you get this:

http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-60698

However if you go to the server's page and click on "driver downloads"
you get this (only up to RHEL, which you find out only INSIDE the zip):

http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-56730#scsi

ARRRGH! guess which page I found last week and which one I discovered
only NOW as I write this message...

However, on Adaptec's site, they have a SOURCE tarball, but it
specificly says it will ONLY work if the HostRAID option is enabled...

go to downloads, pick ANY of the Ultra320 controllers (their DL pages
all point to the same drivers)
http://www.adaptec.com/en-US/support/scsi/u320/ASC-39320D/

and you get both precompiled and tarballs...

I don't know which ones to use anymore :-/ I guess for Debian you must
use HostRAID with the source, but for my current client I could actually
save them the pain and use the binaries from the first link on this
Email (I assume the Centos kernel is ABI compatible to RHEL4 and all)

> Furthermore, HostRaid is a fairly crummy adapter, and you are better
> off, both performance and everything else, using MD. ServerRaid is a
> fairly good driver, and I use it myself.

that's what I use on my private server, but I donno about installing it
on a much more loaded machine.

-- 
Collateral damage
Ira Abramov
http://ira.abramov.org/email/

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