04-23-2013
You might be able to use
magicrescue or photorec to recover scattered files from it, but this will be patchy at best and useless at worst for the reasons Rudic gave. These tools just look at raw blocks for recognizable jpeg headers and the like -- they cannot recover fragmented or unidentifiable files.
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EHCI(4) BSD Kernel Interfaces Manual EHCI(4)
NAME
ehci -- USB Enhanced Host Controller driver
SYNOPSIS
ehci* at cardbus? function ?
ehci* at pci? dev ? function ?
usb* at ehci?
DESCRIPTION
The ehci driver provides support for the USB Enhanced Host Controller Interface, which is used by USB 2.0 controllers.
EHCI controllers are peculiar in that they can only handle the USB 2.0 protocol. This means that they normally have one or more companion
controllers (i.e., ohci(4) or uhci(4)) handling USB 1.x devices. Consequently each USB connector is electrically connected to two USB con-
trollers. The handling of this is totally automatic, but can be noticed since USB 1.x and USB 2.0 devices plugged in to the same connector
appear to connect to different USB busses.
SEE ALSO
cardbus(4), ohci(4), pci(4), uhci(4), usb(4)
HISTORY
The ehci driver appeared in NetBSD 1.6.
BUGS
The support for hubs that are connected with high speed upstream and low or full speed downstream (i.e., for transaction translators) is lim-
ited.
BSD
Aug 10, 2008 BSD