ddr_config(8) System Manager's Manual ddr_config(8)
NAME
ddr_config - Compile and display the SCSI CAM I/O device database
SYNOPSIS
/sbin/ddr_config [-option] [argument...]
OPTIONS
Compiles the /etc/ddr.db binary database file from the input filename. If no input file is specified, the /etc/ddr.dbase file is used as
the default. The input filename must use the syntax rules specified in ddr.dbase(4). Displays the contents of the /etc/ddr.db database for
the specified SCSI device. The display is to standard output.
The type is the device type, one of the following strings or integer values:
String: Integer: ------- -------- disk 0 tape 1 printer 2 processor
3 worm 4 rodirect, cdrom 5 scanner 6 optical 7 changer 8 comm 9
The vendor_id is the string that defines the vendor's id for the device. Be sure to exactly quote the vendor's id in the string,
including the correct number of space characters, if needed.
The product_id and revision are optional strings for the vendor's name for the product and its revision (or version) number. If
used, be sure to exactly quote them, including the correct number of space characters. Displays the database contents for a
global_section. Enter one of the following global section names (only the first three characters are checked by the compiler):
partitions densities Displays the ddr_config help information. Processes the /sys/data/cam_data.c file, and writes to standard out-
put. The output is a summary of additions and modifications that you should make to the /etc/ddr.dbase file in order to synchronize
it with the /sys/data/cam_data.c file.
The MACHINE parameter must be specified, and it must be the name of your machine's system configuration file, the file you used to
build your current system. The MACHINE system configuration file supplies the machine-specific information that the -x option uses
to produce the output summary. Use this option as an aid to propagating customized SCSI device information into the dynamic device
recognition database.
DESCRIPTION
Dynamic Device Recognition (DDR) is a framework for describing the operating parameters and characteristics of SCSI devices to the SCSI CAM
I/O subsystem. You use a utility, /sbin/ddr_config, and a text database, /etc/ddr.dbase, to make changes to the subsystem after installa-
tion and without rebooting.
This dynamic device recognition capability replaces the static methods of device recognition that have been employed by using the compiled-
in device table, /sys/data/cam_data.c.
Note
SCSI devices in the /sys/data/cam_data.c file are supported for this release of the operating system, but support will be withdrawn in a
future release.
Use the /sbin/ddr_config utility to compile new versions of the device definition binary database. If you use the utility to compile cus-
tomized databases, be sure to follow the syntax rules specified in ddr.dbase(4).
The /etc/ddr.dbase text database file is initially populated on the software distribution, and is used when the system is booted at instal-
lation. After the initial installation, you determine when this text database needs to be changed. Then, you edit the /etc/ddr.dbase file
to make the changes and then use the /sbin/ddr_config utility to compile the changes.
The /sbin/ddr_config utility places the output in the /etc/ddr.db binary database file and notifies the kernel that the device database has
been modified. The kernel then synchronizes its in-memory device tables with the definitions in the /etc/ddr.db binary database file.
ERRORS
The compiler returns syntax errors to the standard output device. An output file is not produced if there are syntax errors.
EXAMPLES
The following two examples show how the command can be used to display the partition table defaults and the tape density table from the
global section of the /etc/dbase file. # ddr_config -g par
Recommended Partition Table Defaults:
Partition_A_Size : 64 MBytes
Partition_B_Size : 128 MBytes
Partition_G_Size : 400 MBytes
Min_Partition_Size : 50 MBytes
# ddr_config -g den
SCSI Density Code Translation Table:
Density Code Density BPI Blocking Name
0x00 0 0 default
0x01 800 0 800r_bpi
0x02 1600 0 1600r_bpi
0x03 6250 0 6250r_bpi
0x04 8000 0 8000c_bpi
0x05 8000 0 8000r_bpi
0x06 3200 0 3200r_bpi
0x07 6400 0 6400c_bpi
0x08 8000 0 8000cs_bpi
0x09 38000 0 38000c_bpi
0x0a 6666 0 6666c_bpi
0x0b 1600 0 1600c_bpi
0x0c 12690 0 12690c_bpi
0x0d 10000 512 qic120_ecc
0x0e 10000 512 qic150_ecc
0x0f 10000 512 qic120
0x10 10000 512 qic150
0x11 16000 0 qic320
0x12 0 0 qic1350
0x13 61000 0 61000_bpi
0x14 54000 0 54000_bpi
0x15 45434 0 45434_bpi
0x16 10000 0 10000_bpi
0x17 42500 0 42500_bpi
0x18 42500 0 density_code_18
0x19 62500 0 62500_bpi
0x1a 81630 0 81630_bpi
0x1b 0 0 density_code_1b
0x1c 0 0 density_code_1c
0x1d 0 0 density_code_1d
0x1e 36000 0 36000_bpi
0x1f 0 0 density_code_1f
0x20 0 0 density_code_20
0x21 0 0 density_code_21
0x22 40640 0 40640_bpi
0x23 0 0 density_code_23
0x24 61000 0 density_code_24
0x25 0 0 density_code_25
0x26 0 0 density_code_26
0x27 0 0 density_code_27
0x28 0 0 density_code_28
0x29 0 0 density_code_29
0x2a 0 0 (None)
0x2b 0 0 (None)
0x2c 0 0 (None)
0x2d 0 0 (None)
0x2e 0 0 (None)
0x2f 0 0 (None)
FILES
Binary database of SCSI device definitions Text database of SCSI device definitions
SEE ALSO
Files: ddr.dbase(4)
ddr_config(8)