Custom kernels causing Promise ATA RAID to go down

Michael W. Oliver freebsd-current at
Thu Jun 10 10:58:28 GMT 2004

On 2004-06-10T14:28:48+1000, Alastair G. Hogge wrote:
> Thought about this. But I don't think it is the case. I've had the 2 HD for 
> sometime now, and I they used to 24/7. I have 3 fans running in my tower 
> case.
> I've just re-built world again recently and I'm still getting problems.
> I need to get that other machine going.

I am using an on-board Promise controller, and had similar problems when
first setting up this server.

# pciconf -lv | grep -B1 -A3 Promise
atapci0 at pci2:2:0:       class=0x010485 card=0x1275105a chip=0x5275105a rev=0x01 hdr=0x00
    vendor   = 'Promise Technology Inc'
    device   = 'PDC20276 Ultra133 TX2/FastTrak TX Lite EIDE Controller'
    class    = mass storage
    subclass = RAID

What I discovered was that my cables were too long.  I had purchased
those round cables in order to reduce air flow restrictions in the case,
but at the time, I could only get 36" cables.  After quite a few lost
mirrors, I found out that those cables _should_ be a maximum of 18"
long.  I replaced the 36" cables with 18" cables and haven't had a
problem since.

I don't know if this will help you, but it certainly fixed the problems
that I was having.

Good luck.

perl -e 'print unpack("u","88V]N=&%C=\"!I;F9O(&EN(&AE861E<G,*");'

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