Godot's Hardware page

Cdvd

CD/DVD Tips And Tricks

# use the program xine-check to determine whether your cd/dvd software (e.g., mplayer, ogle, xine,...) is configured optimally:
```
 xine-check 
```
# enable dma for your dvd player:
```
 sudo hdparm -d1 -X34 /dev/dvd 
```
If you are satisfied with this setting, consider appending its specification to /etc/init.d/bootmisc.sh:
```
 echo hdparm -d1 -X34 /dev/dvd|sudo bash -c "cat >> /etc/init.d/bootmisc.sh" 
```
# how to write bootable cd/dvd images to cd/dvd using linux: here

# create an exact copy of the information on a cd/dvd to your hard disk:

 sudo umount /dev/cdrom;sudo dd if=/dev/cdrom of=/tmp/image.iso conv=noerror

# how to burn a DVD-Video under Linux with mkisofs and dvdrecord

Tips To Write/burn Cds

# initialize the variable ISO_DATA which points to the information you wish to write to a cd/dvd, and the variable ISOFILE which specifies name and location for the cd/dvd image:
```
 export ISO_DATA=/home/$USER
 export ISOFILE=/tmp/image.iso
 sudo ls -al $ISOFILE 
```
# create the iso image, write it to $ISOFILE and make it contain all files found in $ISO_DATA (including all subdirectories):
```
 mkisofs -J -r -o $ISOFILE -R $ISO_DATA 
```

# test the newly created iso image (optional step):

 sudo mount -t iso9660 -o loop,ro $ISOFILE /cdrom
 ls -alR /cdrom
 sudo umount /cdrom

# find out which cd/dvd writer can be used:

 export CDWRITER=`sudo cdrecord -scanbus|grep RW|head -1|cut -f2`
 if [ :$CDWRITER: == :: ];then
   export CDWRITER=`sudo cdrecord -scanbus|grep DVDRAM|head -1|cut -f2`
   fi
 if [ :$CDWRITER: == :: ];then
   export CDWRITER=`sudo cdrecord -scanbus|grep SD-R2512|head -1|cut -f2`
   fi
 if [ :$CDWRITER: == :: ];then
   export CDWRITER=0,0,0
   echo REMARK: your cd writer device could not be detected automatically...
   echo REMARK: using $CDWRITER as default device...
   echo REMARK: check whether your default device behaves properly with:
   echo sudo cdrecord -scanbus
   fi
 echo we will be using device :$CDWRITER: to write your cd/dvd to...

# if you wish to clean an existing cd/rw, you can burn the data with:

 time sudo cdrecord dev=$CDWRITER -blank=fast -v -eject $ISOFILE

# if you are using a blank cd/rw, you can burn the data with:
```
 time sudo cdrecord dev=$CDWRITER -v -eject $ISOFILE 
```

Tips To Burn Dvds

# how to burn a DVD-Video under Linux with mkisofs and dvdrecord
# how I burn the information found in $DATA_FOR_DVD on a dvd+rw using linux (and a sony dvd/cd rewritable drive unit model dru-500ax which is found at /dev/dvd):
1. # specify where the information for the DVD can be found, where the temporary iso file can be stored, and the name of the DVD iso image:
```
 export DATA_FOR_DVD=/tmp/dvd 
```
2. # clean the dvd+rw:
```
 sudo dvd+rw-format -force /dev/dvd 
```
3. # perform the writing (master and burn an iso9660 volume):
```
 growisofs -speed=2 -r -T -multi -overburn -Z /dev/dvd $DATA_FOR_DVD 
```
4. # append more data to an already mastered volume (make sure to use the same options for both initial burning and following sessions):
```
 growisofs -speed=2 -r -T -multi -overburn -M /dev/dvd $DATA_FOR_DVD 
```
5. # perform the writing of a pre-mastered iso9660 volume to a dvd:
```
 growisofs -speed=2 -dvd-compat -r -T -multi -overburn -Z /dev/dvd $DATA_FOR_DVD 
```

Tips To Set Up firewire Devices

Enabling FireWire support for an external hard disk:

# load the appropriate modules:

 echo ieee1394         >> /etc/modules-`uname -r` # FireWire protocol
 echo ohci1394          >> /etc/modules-`uname -r` # Open Host Controller Interface
 echo raw1394           >> /etc/modules-`uname -r` # Serial Bus Protocol-2
 echo usb-storage       >> /etc/modules-`uname -r` # generic usb support for storage devices

# check whether the device is present according to your machine:
```
 sudo gscanbus 
```
# if the device is not yet present, you might need to execute the utility from http://www.garloff.de/kurt/linux/rescan-scsi-bus.sh to look for new scsi devices:
```
 cd /usr/local/bin
 wget -N --retr-symlinks http://www.garloff.de/kurt/linux/rescan-scsi-bus.sh
 sudo sh /usr/local/bin/rescan-scsi-bus.sh 
```
# list the partitions which are currently known to your machine with:
```
 sudo sfdisk -l 
```

Tips To Configure Your Laptop's Modem

Making a modem work consists of two phases: the modem device must first be made available, and then configured.

# configuring the modem driver:
1. # a winmodem:
  - # under construction
2. # an intel modem 82801ca/cam, as can be found in a dell latitude c640:
  - # locate the appropriate modem driver from the Internet:
```
 cd /tmp;
 wget http://linmodems.technion.ac.il/pctel-linux/pctel-0.9.6.tar.gz 
```
  - # unpack the stuff:
```
 tar -xzvf pctel-0.9.6.tar.gz 
```
  - # configure the make files for your platform:
```
 cd /tmp/pctel-0.9.6
 ./configure --with-hal=i8xx 
```
  - # make and install the stuff if successful:
```
 if make;then sudo make install;else echo problem making the stuff =============;fi 
```
  - # make sure that the modem modules are loaded at boot time:
```
 echo pctel >> /etc/modules-`uname -r`
 echo ptserial  >> /etc/modules-`uname -r` 
```
# configuring the dial in program wvdial:
- # run the configuration program (if this program does not seem to find your modem, you may have a problem which is not within the scope of this page: read the INSTALL and README files of the modem driver software, e.g., at http://linmodems.technion.ac.il/pctel-linux):
```
 sudo wvdialconf /etc/wvdial.conf 
```
- # Note that this program probably terminates mentioning where your modem has been found, e.g.,
```
 Found a modem on /dev/ttyLT0, using link /dev/modem in config. 
```
  indicates that the modem device is /dev/ttyLT0
- # edit /etc/wvdial.conf to specify the phone number you wish to dial, the userid that must be used, and the password which should be presented:
```
 joe /etc/wvdial.conf 
```
  This file typically looks like this:
```
[Dialer Defaults]
Modem = /dev/modem
Baud = 115200
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ISDN = 0
Modem Type = Analog Modem
Phone = <Target Phone Number>
Username = <Your Login Name>
Password = <Your Password> 
```
# test your modem configuration:
```
 sudo wvdial 
```
# if the program claims not to be able to detect /dev/modem, you should create a symbolic link pointing to the modem device (assume /dev/ttyLT0 is reported by the wvdialconf program ):
```
 ln -sf /dev/ttyLT0 /dev/modem 
```
# you can now use your modem to dial to your Internet service provider using:
```
 sudo wvdial 
```

Tips For Tape Drives

Tape archiving (works for an HP StorageWorks Ultrium 460 using an Adaptec AIC-7892A U160/m (rev 2) SCSI controller)

# use modconf to load the appropriate module for your scsi adapter (e.g., kernel/drivers/scsi/aic7xxx_old)
# use modconf to load the module which provides scsi tape support (i.e., kernel/drivers/scsi/st). Once these modules have been loaded successfully, your scsi tape drive and adapter should appear at the end of
```
 dmesg 
```

# Assume dmesg reports your scsi tape drive as st0:

 if [ :$TAPEDRIVE: == :: ];then export TAPEDRIVE=st0;fi
 if [ :$REWINDEDTAPE_DEV: == :: ];then export REWINDEDTAPE_DEV=/dev/$TAPEDRIVE;fi
 if [ :$UNREWINDEDTAPE_DEV: == :: ];then export UNREWINDEDTAPE_DEV=/dev/n$TAPEDRIVE;fi

# rewind the current tape:
```
 time mt -f $REWINDEDTAPE_DEV rewind 
```

# append new data from $DATADIR to the end of the current tape:

 time mt -f $REWINDEDTAPE_DEV rewind  
 time while tar -tzf $UNREWINDEDTAPE_DEV;do date;done #> /tmp/tape.content.txt
 time tar -czvf $UNREWINDEDTAPE_DEV --totals --label=":full backup of :$DATADIR: created on `date`:" $DATADIR

# add $DATADIR to the tape archive without first rewinding the tape:

 if [ :$DATADIR: == :: ];then DATADIR=/home;fi
 time tar -czvf $UNREWINDEDTAPE_DEV --totals --label=":full backup of :$DATADIR: created on `date`:" $DATADIR

# rewind the current tape and list its content:

 time mt -f $REWINDEDTAPE_DEV rewind
 time while tar -tzf $UNREWINDEDTAPE_DEV;do date;done #> /tmp/backup.tape.content.txt

# restore all data from the current tape, given that it matches $PATTERN:

 time mt -f $REWINDEDTAPE_DEV rewind
 if [ :$PATTERN: == :: ];then PATTERN=$USER;fi
 if [ :$RESTORED: == :: ];then RESTORED="/tmp/restored.from.tape.on.`date`";fi
 mkdir -p "$RESTORED"
 cd "$RESTORED";time while tar -xzvf $UNREWINDEDTAPE_DEV \*$PATTERN\*;do date;done

# eject the current tape after rewinding:
```
 time mt -f $REWINDEDTAPE_DEV offline 
```

Tips For Usb Devices

# if you want to make sure that usb 2.0 devices are used at their maximum throughput, you should load the ehci-hcd module at boot time:
```
 echo ehci-hcd >> /etc/modules-`uname -r` 
```