There are some USB flash memory devices that don't seem to be properly
recognized or mounted by the devb-umass block driver. When this is
seen, upon checking the system log with 'sloginfo' a message such as the
following can be seen in the output: umass_bulk_reset: path 0, devno 1
With
the devices in question, it was found that they were taking an extended
period of time to reply to the "SCSI Inquiry". The timeout for this
value is hard-coded.
In 6.3.2 the value was 8 seconds. In 6.4.x, there was a side effect to a particular change that set this value at 2 seconds.
In
the case of the USB sticks in question, this 2 second value was not
sufficient. The value has been increased to ~10 seconds as a result of
PR#74501. This update is part of future (post 6.4.1) software releases.
NOTE:
This entry has been validated against the SDP version listed above. Use
caution when considering this advice for any other SDP version. For
supported releases, please reach out to QNX Technical Support if you have any questions/concerns.
