XT2640 Operating Manual
13 July 2016
Page 118 of 187
USB DEVICE FAULT.
This indicates that the XT2640 has detected the device as being attached but the device failed to
enumerate properly. This may indicate that the device draws more than 500mA of power or that the
drive is not compatible with the USB2.0 specification. The drive should be removed and after waiting
a few seconds it should be reinserted, if the message returns then the drive is not compatible with
the XT2640 (this can also sometimes be caused by a partial or intermittent insertion of the drive into
the XT2640 – it is recommended to check if the connections are clean).
USB DEVICE INCOMPATIBLE. This indicates that the drive has enumerated correctly, but that the drive is either not detected as a
Mass Storage Class device or has multiple drives, and so is not compatible with the XT2640.
USB DRIVE MOUNTING.
This indicates that the XT2640 has detected the drive and is attempting to mount the drive. For
some drives this can take several seconds, portable hard drives can take even longer as the drive
must achieve the correct rotation speed before it will mount.
USB DRIVE INCOMPATIBLE. This indicates that the drive has been correctly detected and has been correctly mounted, but
inspection of the drive has not found a valid FAT32 partition for the XT2640 to use. The drive may
need to be formatted. Not all drives are formatted with FAT32 when purchased (but most are) so
require formatting on a computer before they can be used with a XT2640.
USB DRIVE READY.
This indicates that the drive has been successfully enumerated and mounted and is compatible with
the XT2640. There is a very small possibility that the drive may fail compatibility at some later point
in time, such as when reading or writing files, but this has never been seen and is very unlikely.
Note:
While data is actually transferring between the drive and the XT2640 the background of the USB Drive Info area flashes a
dark maroon color. Do not remove a drive while this is colored. Many drives have an LED (or similar), on many drives this
indicates activity but on some drives this indicates connection state. Do not rely on a LED mounted on the drive for
deciding whether a drive can be safely removed.
If using a computer running Windows to format a drive ‐
Depending on the size of the drive, the default for Windows may not be the FAT32 format. In those cases you
should ensure that the FAT32 format is selected before starting to format the drive.
For best performance, the Allocation Unit Size (or cluster size) should be set to a setting of 8kbytes or higher (for
most drives 16k is optimal for speed).
For reasons unknown to XiTRON, some drives cannot be formatted by Windows to the FAT32 format. In those
cases you may need to obtain a third party drive format application to format the drive. There are several that
are free of charge available on the internet.
23.3
FILES
The XT2640 only operates on files in the root directory of the drive and only uses the 8.3 filename format.
The XT2640 does not include the ability to format a drive nor for file management. These actions should be performed using a
computer if required.
Note:
By definition, 8.3 filenames are not case sensitive so the use of uppercase letters is recommended in filenames to avoid
confusion.
The following file names may not be used except for specific file types –
MLO
PA900.S19
PA900.HEX
WELCOME.IMG
VHLIMIT.CSV
AHLIMIT.CSV
CUSTOM.CSV
23.4
CHECKING
THE
DRIVE
FILE
STRUCTURE
If a drive is accidently removed, or the XT2640 has power removed, while activity is in progress then it is possible that the file
structure of the drive has been damaged. It is recommended to use a utility program on a computer to check for and repair any file
structure damage which may have occurred if this is suspected.
23.5
EXPORTING
FILES
TO
A
DRIVE
This is achieved by pressing the USB Drive Info area while a drive is correctly attached. This initiates a screen which allows you to
export files.
