Hello Flavio, Most likely the problem is related to the CF - as I wrote in that old article, most CF cards in IDE mode lie about support of the DMA mode. They do support UDMA so most people never notice that small lie. But Axis CPU used in the camera has a bug of it's own - and this bug is related to the UDMA. If the card would hostly report that it does not support DMA camera driver would just go to PIO mode (ABSOLUTELY NOT SUITABLE for the video recording - both slow and using to much of the camera CPU resources), but it does not, so camera may hang up and never come out of the boot scripts. So what we did was to add some known "bad" cards to the driver black list:
http://elphel.cvs.sourceforge.net/viewvc/elphel/elphel353-8.0/os/linux-2.6-tag--devboard-R2_10-4/drivers/ide/ide-dma.c?view=markup(lines 130..136). At some point we black-listed all no-name cards (we did not find any among them that did support DMA) You may use hdparm -I (from http://192.168.0.9/phpshell.php, telnet or serial console that you should have cable for) and the only way to re-enable (if you card matches the black-listed one) the card is to modify that file and recompile the camera firmware. The only type of CF cards we use ourselves is "Sandisk Extreme III". When the card is blacklisted, camera bots correctly and is able to mount (and use) the card - it can be used to save images or very slow video (still useful for timelapse), but not the normal video. You may test the speed of the CF card (that test will destroy data on it!) with the following command (again - phpshell, telnet, serial console): time dd if=/dev/circbuf of=/dev/hda #(or hdb - depending how is the card inserted/configured) /dev/circbuf is the circular buffer ~19MB in size that is very fast to read for the camera, so the speed will be related to the CF itself You may try it on /dev/null first: [root@Goniometer /dev]16713# time dd if=/dev/circbuf of=/dev/null 38656+0 records in 38656+0 records out real 0m 0.43s user 0m 0.11s sys 0m 0.32s With phpshell you may just open the following link (provided you have the default IP) - just replace all spaces in the command line with "+" signs http://192.168.0.9/phpshell.php?command=time+dd+if=/dev/circbuf+of=/dev/null Then divide 19MB by the time measured. Andrey
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