Schily's USER COMMANDS BTCFLASH(1L)
NAME
btcflash - Firmware flash utility for BTC DRW1008 DVD+/-RW
recorder
SYNOPSIS
btcflash dev=device [ options ] [ f=firmwarefile ]
DESCRIPTION
Btcflash is used to read update the Firmware for a BTC
DRW1008 DVD+/-RW recorder.
Be very careful when writing firmware as this program does
not check for the correctness of the target device.
Device naming
For a list of possible device name parameters call btcflash
-scanbus or btcflash dev=help and then use the right dev=
parameter based on the device listing.
OPTIONS
-help
Prints a short summary of the p options and exists.
-version
Print version information and exit.
dev=target
Set the SCSI target for the CD/DVD/BluRay-Recorder, see
notes above. A typical target device specification is
dev=1,6,0 . If a filename must be provided together
with the numerical target specification, the filename
is implementation specific. The correct filename in
this case can be found in the system specific manuals
of the target operating system. On a FreeBSD system
without CAM support, you need to use the control device
(e.g. /dev/rcd0.ctl). A correct device specification
in this case may be dev=/dev/rcd0.ctl:@ .
General SCSI addressing
The target device to the dev= option refers to
scsibus/target/lun of the CD/DVD/BluRay-Recorder. Com-
munication on SunOS is done with the SCSI general
driver scg. Other operating systems are using a library
simulation of this driver. Possible syntax is: dev=
scsibus,target,lun or dev= target,lun. In the latter
case, the CD/DVD/BluRay-Recorder has to be connected to
the default SCSI bus of the machine. Scsibus, target
and lun are integer numbers. Some operating systems or
SCSI transport implementations may require to specify a
filename in addition. In this case the correct syntax
for the device is: dev= devicename:scsibus,target, or
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dev= devicename:target,lun. If the name of the device
node that has been specified on such a system refers to
exactly one SCSI device, a shorthand in the form dev=
devicename:@ or dev= devicename:@,lun may be used
instead of dev= devicename:scsibus,target,
Remote SCSI addressing
To access remote SCSI devices, you need to prepend the
SCSI device name by a remote device indicator. The
remote device indicator is either REMOTE:user@host: or
REMOTE:host: A valid remote SCSI device name may be:
REMOTE:user@host: to allow remote SCSI bus scanning or
REMOTE:user@host:1,0,0 to access the SCSI device at
host connected to SCSI bus # 1,target 0, lun 0. In
order to allow remote access to a specific host, the
rscsi(1) program needs to be present and configured on
the host.
Alternate SCSI transports
ATAPI drives are just SCSI drives that inherently use
the ATA packet interface as SCSI command transport
layer build into the IDE (ATA) transport. You may need
to specify an alternate transport layer on the command
line if your OS does not implement a fully integrated
kernel driver subsystem that allows to access any drive
using SCSI commands via a single unique user interface.
To access SCSI devices via alternate transport layers,
you need to prepend the SCSI device name by a transport
layer indicator. The transport layer indicator may be
something like USCSI: or ATAPI:. To get a list of sup-
ported transport layers for your platform, use dev=
HELP:
Portability Background
To make btcflash portable to all UNIX platforms, the
syntax dev= devicename:scsibus,target, is preferred as
it hides OS specific knowledge about device names from
the user. A specific OS may not necessarily support a
way to specify a real device file name nor a way to
specify scsibus,target,lun.
Scsibus 0 is the default SCSI bus on the machine. Watch
the boot messages for more information or look into
/var/adm/messages for more information about the SCSI
configuration of your machine. If you have problems to
figure out what values for scsibus,target,lun should be
used, try the -scanbus option of btcflash described
below.
Using logical names for devices
If no dev option is present, btcflash will try to get
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the device from the CDR_DEVICE environment.
If a file /etc/default/cdrecord exists, and if the
argument to the dev= option or the CDR_DEVICE environ-
ment does not contain the characters ',', '/', '@' or
':', it is interpreted as a device label name that was
defined in the file /etc/default/cdrecord (see FILES
section).
Autotarget Mode
If no dev= option and no CDR_DEVICE environment is
present, or if it only contains a transport specifyer
but no address notation, btcflash tries to scan the
SCSI address space for CD-ROM drives. If exactly one
is found, this is used by default.
timeout=#
Set the default SCSI command timeout value to #
seconds. The default SCSI command timeout is the
minimum timeout used for sending SCSI commands. If a
SCSI command fails due to a timeout, you may try to
raise the default SCSI command timeout above the
timeout value of the failed command. If the command
runs correctly with a raised command timeout, please
report the better timeout value and the corresponding
command to the author of the program. If no timeout
option is present, a default timeout of 40 seconds is
used.
debug=#, -d
Set the misc debug value to # (with debug=#) or incre-
ment the misc debug level by one (with -d). If you
specify -dd, this equals to debug=2. This may help to
find problems while opening a driver for libscg. as
well as with sector sizes and sector types. Using
-debug slows down the process and may be the reason for
a buffer underrun.
kdebug=#, kd=#
Tell the scg-driver to modify the kernel debug value
while SCSI commands are running.
-silent, -s
Do not print out a status report for failed SCSI com-
mands.
-v Increment the level of general verbosity by one. This
is used e.g. to display the progress of the process.
-V Increment the verbose level with respect of SCSI com-
mand transport by one. This helps to debug problems
during the process, that occur in the CD-Recorder. If
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you get incomprehensible error messages you should use
this flag to get more detailed output. -VV will show
data buffer content in addition. Using -V or -VV slows
down the process.
f=file
Specify the filename where the firmware should be read
from.
-scanbus
Scan all SCSI devices on all SCSI busses and print the
inquiry strings. This option may be used to find SCSI
address of the devices on a system. The numbers
printed out as labels are computed by: bus * 100 + tar-
get
scgopts=list
A comma separated list of SCSI options that are handled
by libscg. The implemented options may be uptated
indepentendly from applications. Currently, one
option: ignore-resid is supported to work around a
Linux kernel bug.
ts=# Set the maximum transfer size for a single SCSI command
to #. The syntax for the ts= option is the same as for
cdrecord fs=# or sdd bs=#.
If no ts= option has been specified, btcflash defaults
to a transfer size of 256 kB. If libscg gets lower
values from the operating system, the value is reduced
to the maximum value that is possible with the current
operating system. Sometimes, it may help to further
reduce the transfer size or to enhance it, but note
that it may take a long time to find a better value by
experimenting with the ts= option.
EXAMPLES
ENVIRONMENT
RSH If the RSH environment is present, the remote connec-
tion will not be created via rcmd(3) but by calling the
program pointed to by RSH. Use e.g. RSH=/usr/bin/ssh
to create a secure shell connection.
Note that this forces cdrecord to create a pipe to the
rsh(1) program and disallows cdrecord to directly
access the network socket to the remote server. This
makes it impossible to set up performance parameters
and slows down the connection compared to a root ini-
tiated rcmd(3) connection.
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RSCSI
If the RSCSI environment is present, the remote SCSI
server will not be the program /opt/schily/sbin/rscsi
but the program pointed to by RSCSI. Note that the
remote SCSI server program name will be ignored if you
log in using an account that has been created with a
remote SCSI server program as login shell.
SEE ALSO
cdrecord(1), scg(7), rcmd(3), ssh(1).
NOTES
DIAGNOSTICS
A typical error message for a SCSI command looks like:
btcflash: I/O error. test unit ready: scsi sendcmd: no error
CDB: 00 20 00 00 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 05 00 00 00 00 0A 00 00 00 00 25 00 00 00 00 00
Sense Key: 0x5 Illegal Request, Segment 0
Sense Code: 0x25 Qual 0x00 (logical unit not supported) Fru 0x0
Sense flags: Blk 0 (not valid)
cmd finished after 0.002s timeout 40s
The first line gives information about the transport of the
command. The text after the first colon gives the error
text for the system call from the view of the kernel. It
usually is: I/O error unless other problems happen. The
next words contain a short description for the SCSI command
that fails. The rest of the line tells you if there were any
problems for the transport of the command over the SCSI bus.
fatal error means that it was not possible to transport the
command (i.e. no device present at the requested SCSI
address).
The second line prints the SCSI command descriptor block for
the failed command.
The third line gives information on the SCSI status code
returned by the command, if the transport of the command
succeeds. This is error information from the SCSI device.
The fourth line is a hex dump of the auto request sense
information for the command.
The fifth line is the error text for the sense key if avail-
able, followed by the segment number that is only valid if
the command was a copy command. If the error message is not
directly related to the current command, the text deferred
error is appended.
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The sixth line is the error text for the sense code and the
sense qualifier if available. If the type of the device is
known, the sense data is decoded from tables in scsierrs.c .
The text is followed by the error value for a field replace-
able unit.
The seventh line prints the block number that is related to
the failed command and text for several error flags. The
block number may not be valid.
The eight line reports the timeout set up for this command
and the time that the command really needed to complete.
BUGS
AUTHOR
Joerg Schilling
D-13353 Berlin
Germany
Additional information can be found on:
http://cdrecord.org/private/cdrecord.html
If you have support questions, send them to:
cdrtools-support@lists.sourceforge.net
If you have definitely found a bug, send a mail to:
cdrtools-developers@lists.sourceforge.net
or joerg@schily.net
To subscribe, use:
https://lists.sourceforge.net/lists/listinfo/cdrtools-
developers
or https://lists.sourceforge.net/lists/listinfo/cdrtools-
support
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