kern/68420: panic: EHCI and umass

Bryan Liesner bryan at
Mon Jul 19 15:22:58 PDT 2004

On Mon, 19 Jul 2004, Lukas Ertl wrote:

> Synopsis: panic: EHCI and umass
> State-Changed-From-To: open->feedback
> State-Changed-By: le
> State-Changed-When: Mon Jul 19 18:25:04 GMT 2004
> State-Changed-Why:
> Is this panic still happening?  I had no problems to dump a gigabyte
> filesystem to my USB2.0 hard disk.

Yes and no.  If I have a drive attached to my Promise PDC20269, it 
happens every time.  If I remove the card and attach the drive to my 
motherboard's VIA 8233, it works just fine.  It doesn't seem to 
matter whether I'm using either of the below drives on the Promise, 
the transfer just stops and eventually panics as described in the PR.

The performance of the Promise is dismal, the Maxtor and the Seagate 
barely reach 20M/s throughput, while I get at least 50M/s on the VIA. 
There's something strange going on here.

Motherboard is an ASUS A7V266/E.

ad0: 76319MB <ST380013A> [155061/16/63] at ata0-master UDMA100
ad1: 57259MB <MAXTOR 6L060J3> [116336/16/63] at ata0-slave UDMA100

Hopefully Soren has an explanation.  Maybe the VIA chipset doesn't get 
along with the Promise, although ASUS offered a Promise raid as an 
option on those boards (absent on mine).  I've never seen any ATA 
error messages while using the Promise.

To make a long story short, this appears to be an ATA problem, not a 
USB problem.  Dumping filesystems to the USB drive worked before the 
NetBSD import, but the import probably exposed a completely different 

It's safe to close this bug.

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