hi all:
we met a USB Hard Disk that will go to suspend if host stop
sending scsi read command over 5mins.
To save the IO, kernel will keep the file in page cache as much as
he can and under this circumstances, the read command may disappear
for a while longer enough to cause the device suspend.
is there any kernel config or module parameter can do the dummy
read periodically, even the sector 0 (MBR) is fine.
or is there any kernel api I can use to read sector 0(MBR) maybe
every 4mins?
appreciate your help in advance,
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