Welcome to our peer-to-peer forums, where owners help owners. Need help now? Visit eSupport here.

English Community

Linux Operating SystemsOther Linux Discussions
All Forum Topics
Options

8 Posts

11-09-2008

California, USA

16 Signins

85 Page Views

  • Posts: 8
  • Registered: ‎11-09-2008
  • Location: California, USA
  • Views: 85
  • Message 1 of 2

dmraid and ICH9R (Intel Matrix Storage Manager) on W700?

2009-07-12, 22:13 PM
Does anyone have dmraid working with Intel Matrix Storage Manager (ICH9) SATA controller? I have a W700, and got Fedora 10 to install with the SATA controller set to AHCI in the BIOS, but now when i try to install F11, it seems to have gained the ability to recognize the controller and appears to get confused by the mdriad I installed under F10.
Reply
Options

8 Posts

11-09-2008

California, USA

16 Signins

85 Page Views

  • Posts: 8
  • Registered: ‎11-09-2008
  • Location: California, USA
  • Views: 85
  • Message 2 of 2

Re: dmraid and ICH9R (Intel Matrix Storage Manager) on W700?

2009-07-27, 15:23 PM

To answer my own question, yes, I now have dmraid working with Intel Matrix Storage Manager (ICH9) SATA controller on my W700, running Fedora 11.

 

 Turns out, F10 dmraid was incapable of detecting the BIOS RAID controller in my laptop (though apparently F9 was, and F11 definitely is). While the Intel/Lenovo docs don't mention it, the Intel Matrix Storage Manager does, however, write some meta-data to the disk header, so merely turning off RAID in the BIOS was not The Right Thing To Do. The F11 install medium comes along and sees both the Intel meta-data [ => dmraid] and the mdraid meta-data, and the combination causes it to descend through confusion into madness.

    The solution was to boot up one last time in F10 and use mdadm to zero out the mdraid meta-data & my data. Next, go into the BIOS and re-enable RAID. Even if you have done The Right Thing previously and clobbered the BIOS RAID meta-data at F10 install, the Intel/Lenovo docs _do_ explain how to re-write it (and switch between RAID 0 and Raid 1). Cf. https://bugzilla.redhat.com/show_bug.cgi?id=510772 for more detail.

    At that point, F11 anaconda sees only the BIOS RAID and happily proceeds with the install, and I'm able to restore my stuff from backups.

 

    I foolishly forgot to do before/after benchmarks, but it feels at least as responsive as F10 with mdraid and, to me, is intellectually more satisfying.

    YMMV,
        Joe

Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete

X

No, I don’t want to share ideas Yes, I agree to these terms