Doug Ambrisko ambrisko at ambrisko.com
Thu Apr 8 08:52:34 PDT 2004

Kenneth D. Merry writes:
| On Wed, Apr 07, 2004 at 07:15:09 -0700, Doug Ambrisko wrote:
| > Kenneth D. Merry writes:
| > | On Tue, Apr 06, 2004 at 20:29:10 -0700, Doug Ambrisko wrote:
| > | > I have a SuperMicro system that does the Intel "ICH5-R" RAID.
| > | > I should get inspired via the Linux code and see if I can add
| > | > that.  So far I've haved setup the RAID but have turned on the ICH
| > | > flag.
| > | 
| > | Adaptec HostRAID is software RAID.  By software RAID, I mean that you only
| > | get BIOS support from the card for booting, and after that all of the RAID
| > | functionality is handled via the host OS.
| > | 
| > | Some of their SCSI controllers include HostRAID support.  e.g.:
| > | 
| > | http://www.adaptec.com/worldwide/product/proddetail.html?sess=no&language=English+US&prodkey=ASC-39320A-R&cat=%2fTechnology%2fUltra320%2fNew+Ultra320+SCSI!
| > 
| > The ICH stuff is not SCSI.  There was no mention of Adaptec in the
| > manual for this motherboard.  There were other SuperMicro boards that
| > had SCSI controllers on them but this one and the one I have do not.
| > They just have SATA ports that can do RAID.
| True, it is SATA, not SCSI.  But the concept, and some of the software, is
| the same.  It's pretty common in OEM deals for the actual vendor of the
| software/hardware to remain unknown.  From what it looks like, the RAID
| functionality is all in software, as opposed to running on a chip embedded
| in the ICH5.

I have working code to read the Intel ICH RAID meta data.  I can boot 
a FreeBSD root partition off a stripe.  I looked at your page and it was 
difficult to see the actual meta data definition.  I might have missed
it since I was looking at the patch as a patch it didn't look the same at 
all.  Do you have a non-patch version of the meta data definition?

Now I need to code up the "write out" of the configuration.  Currently I just
use the configuration created by the BIOS.

I should have this done today then I need to test failure modes.


Doug A.

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