Disks attached to aic94xx controller are not detected by netbooted installer

Asked by Sergey Svishchev

Setting up a machine with an aic94xx (AIC-9410 SAS/SATA RAID) controller is not easy, when you are netbooting.

First, because of bug 315763, its sequencer firmware is missing from netboot's initrd.gz. There are workarounds for that.

Second, installer says "One or more drives containing Serial ATA RAID configurations have been found. Do you wish to activate these RAID devices?" and then fails to detect any drives (even though "fdisk -l" does list them). This seems to be a common failure mode:

http://ubuntuforums.org/showthread.php?t=1194320
http://ubuntuforums.org/showthread.php?t=1501229
http://ubuntuforums.org/showthread.php?t=1328847

I seem to recall that eariler in the year (January), second problem didn't occur during Karmic install, but now it does occur both in Karmic and Lucid.

I'm not sure which installer's component is responsible for this, so I'm asking here for a solution.

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Ubuntu util-linux Edit question
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Sergey Svishchev
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Sergey Svishchev (svs) said :
#1

I don't think this is related to util-linux .

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Sergey Svishchev (svs) said :
#2

Forgot to mention that this machine has only 1 disk in JBOD mode, and RAID support is disabled in AIC-9410 BIOS.

I've added "d-i disk-detect/activate_dmraid boolean false" to preseed file and problem went away.