In message: <[EMAIL PROTECTED]>
[EMAIL PROTECTED] (Dag-Erling Smørgrav) writes:
: Warner Losh <[EMAIL PROTECTED]> writes:
: > Log:
: > Some USB mass storage devices return the number of sectors in response
: > to a READ_CAPACITY request rather than the maximum sector (off by one
: > problem). This causes a huge cascade of errors as the geom tasting
: > code tries to read the last sector (which isn't really there in the
: > face of this error). automated tools that manipulate disk labels and
: > such also have issues.
: >
: > Create a new quirk READ_CAPACITY_OFFBY1 and add a quirk for the
: > SanDISK ImageMate that I have that suffers from this problem (the
: > SDDR-31). It intercepts the READ_CAPACITY response and adjusts it
: > from number of sectors to max sector for devices with this quirk.
: >
: > Reading the Linux source suggests that there are a host of
: > other devices with this issue, including iPods and some popular
: > cameras. I've not added quirks for them, since I don't have the
: > devices in front of me to test.
:
: How about the following dirty hack: if the appropriate kernel option /
: device hint / sysctl knob is frobbed, when a READ_CAPACITY request
: completes, try to read the last sector, and if that doesn't work,
: adjust the result and print a warning to the console?
HOW ABOUT PEOPLE SUBMIT PATCHES RATHER THAN SUGGEST MORE WORK FOR ME.
I ALREADY DISCUSSED THIS IN [EMAIL PROTECTED] ALL ARMCHAIR GENERALS ARE HEREBY
INVITED TO SUBMIT TESTED PATCHES.
HAVE A NICE DAY.
Warner
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