[SI-LIST] Re: Compact Flash Hang
- From: Manickavelu M. <manickavelu_m@xxxxxxxxxxxx>
- To: "'vivek8419@xxxxxxxxx'" <vivek8419@xxxxxxxxx>, "'si-list@xxxxxxxxxxxxx'" <si-list@xxxxxxxxxxxxx>
- Date: Sat, 4 Jul 2009 08:23:12 +0530
Dear Vivek,
Pl check the following:
(A) If the CF that you use is a revolving disk type. Then you ensure that you
give enough power ON settling time prior to first access.
(B) Check whether the bad blocks count is mounting. If so, you need to add
sufficient bad block management.
(C) Ensure that before you switch off the device all the write operations or
cache-back writes are flushed and close completely. You may use soft power off
that checks all these before switching off the power to the CF.
(D) Check the initial inrush current taken bu the CF is managed by your CF host
port. Else it could have created a dip on the power and thus the reset to the
CF port could not have synched with the power to CF.
(E) Check the timings between power rise and the reset active/inactive to CF
together. This might give a clue whether at time CF is not reset during power
ON.
Hope this helps.
Thanks,
Manix.
----- Original Message -----
From: si-list-bounce@xxxxxxxxxxxxx <si-list-bounce@xxxxxxxxxxxxx>
To: si-list <si-list@xxxxxxxxxxxxx>
Sent: Fri Jul 03 19:42:12 2009
Subject: [SI-LIST] Compact Flash Hang
Dear All,
Iam using a compact flash (Type 2 device) used for booting and running
my application software.
I boot and run the application sw from the Compact flash(CF) and then
switch Off the system after testing.. Please note that the CF is
always plugged in.
Over a period say testing my system 500 times , the system just hangs
when i boot it again and we need to restart the system.The screen
suggests that there is no device to boot.Iam able to see the other
devices detected by the system.
Please note that this behavior happens only sometimes after using the
CF over a period.
Can anyone give your comments on the above behavior?. What could be
the problem while using the CF over a period of time.
Cheers
Vivek
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