Comment 92 for bug 61235

I would like to add that I had similar problem with USB HD through kernels 2.6.18-2.6.22 using the combination of Lacie USB 500 GB HD and VIA VT6212L USB chip in an old PIII 500 Mhz machine using debian 4.0 (also tried ubuntu live CDs for gutsy and hardy to no avail)

USB 2.0 Device: Lacie black desktop USB 500 GB hard disk

Jan 20 15:27:43 localhost kernel: Vendor: ST350083 Model: 0AS R

us 001 Device 002: ID 059f:1010 LaCie, Ltd
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 0 (Defined at Interface level)
  bDeviceSubClass 0
  bDeviceProtocol 0
  bMaxPacketSize0 64
  idVendor 0x059f LaCie, Ltd
  idProduct 0x1010
  bcdDevice c6.83
  iManufacturer 2 LaCie
  iProduct 3
  iSerial 1 ST3500830A 9QG616JN
  bNumConfigurations 1

USB Host is prodige USB 2.0 pci-card with VIA VT6212L chip:

00:10.2 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 65) (prog-if 20 [EHCI])
        Subsystem: VIA Technologies, Inc. USB 2.0
        Flags: bus master, medium devsel, latency 66, IRQ 11
        Memory at 42000000 (32-bit, non-prefetchable) [size=256]
        Capabilities: [80] Power Management version 2

Very old Compaq deskpro PIII 500 Mhz computer

I tried everything suggested in

https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/61235

What helped me was the combination of 1 and 2:

1. following patch to /drivers/usb/storage/unusual_devs.h
(found this solution in
http://bugzilla.kernel.org/show_bug.cgi?id=6817
)

UNUSUAL_DEV( 0x059f, 0x1010, 0x0000, 0x0000,
        "Lacie",
        "USB to IDE Disk",
        US_SC_DEVICE, US_PR_DEVICE, NULL,
        US_FL_GO_SLOW | US_FL_MAX_SECTORS_64 ),

2. in ehci-hcd.c:

#define EHCI_TUNE_CERR 0 /* 0-3 qtd retries; 0 == don't stop */

I still see occasional high speed usb device resets, but so far no disconnects. There is definitely something strange going on with this setup, but I'm happy to have solved it. Also the transfer rate is pretty ok, for such an old machine:

hdparm -t /dev/sda

/dev/sda:
 Timing buffered disk reads: 88 MB in 3.03 seconds = 29.01 MB/sec