Syslinux - Jan 2005 - USB booting

folks,

the following is lsusb -v for my 250gb usb hard drive.

I note the Protocol line mentions zip:
ie
      bInterfaceProtocol     80 Bulk (Zip)

does that mean its one of those USB-ZIP devices ?
If so, to the parameters below say anything about the CHS settings needed ?

tia,


PS - HPA, you were correct wrt what I missed :-}



Bus 001 Device 002: ID 1058:0401 Western Digital Technologies, Inc.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x1058 Western Digital Technologies, Inc.
  idProduct          0x0401
  bcdDevice            4.11
  iManufacturer         138 Western Digital
  iProduct              154 External HDD
  iSerial               168 5743414C3731363037393438
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           57
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xc0
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk (Zip)
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               none
          Usage Type               Data
        wMaxPacketSize     0x0200  bytes 512 once
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               none
          Usage Type               Data
        wMaxPacketSize     0x0200  bytes 512 once
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Devices
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.10
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      34
cannot get report descriptor
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
          Usage Type               Data
        wMaxPacketSize     0x0040  bytes 64 once
        bInterval              10
  Language IDs: (length=4)
     0409 English(US)

Jim Cromie wrote:
> 
> folks,
> 
> the following is lsusb -v for my 250gb usb hard drive.
> 
> I note the Protocol line mentions zip:
> ie
>      bInterfaceProtocol     80 Bulk (Zip)
> 
> does that mean its one of those USB-ZIP devices ?
> If so, to the parameters below say anything about the CHS settings needed ?
> 
No, 80 is the value for anything that isn't a standard floppy disk.

Whether or not it's used in USB-ZIP mode or USB-HDD mode is strictly a 
matter of BIOS settings.

USB-HDD is the correct mode.  USB-ZIP is fundamentally an abomination, 
but it can usually be dealt with by specifying 64 heads, 32 sectors.

In USB-HDD mode SYSLINUX (or EXTLINUX) will derive the correct geometry 
at runtime, so it matters not one bit what the geometry detected at 
install time was set to.

	-hpa