Oznacovanie CDRW: sdc0 sg0 scd - co je co?

[Michael Mraka]

% Co je zac /dev/sg0? - lebo obcas je napalovacka toto, proste v niekt.
% programoch (narychlo si nespomeniem) potrebujem zadat sg0 nie scd0 a je
% po problemoch. (Nie je nijako sym/hard-linkovane na s*-cokolvek).
% crw-rw----  1 root cdrom 21, 0 2003-07-09 13:52 /dev/sg0 (bolo
% root:root, to root:cdrom som "vymyslel" ja).
% brw-rw----  1 root cdrom 11, 0 2003-07-09 13:52 /dev/scd0
% brw-rw----  1 root disk 8, 32 2003-07-09 13:52 /dev/sdc

lixux/Documantation/devices.txt:
  8 block       SCSI disk devices (0-15)
                  0 = /dev/sda          First SCSI disk whole disk
                 16 = /dev/sdb          Second SCSI disk whole disk
                 32 = /dev/sdc          Third SCSI disk whole disk
                    ...
                240 = /dev/sdp          Sixteenth SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.
...
  9 char        SCSI tape devices
                  0 = /dev/st0          First SCSI tape, mode 0
                  1 = /dev/st1          Second SCSI tape, mode 0
                    ...
                 32 = /dev/st0l         First SCSI tape, mode 1
                 33 = /dev/st1l         Second SCSI tape, mode 1
                    ...
                128 = /dev/nst0         First SCSI tape, mode 0, no rewind
                129 = /dev/nst1         Second SCSI tape, mode 0, no rewind
...
 11 block       SCSI CD-ROM devices
                  0 = /dev/scd0         First SCSI CD-ROM
                  1 = /dev/scd1         Second SCSI CD-ROM
                    ...

                The prefix /dev/sr (instead of /dev/scd) has been deprecated.
...
 21 char        Generic SCSI access
                  0 = /dev/sg0          First generic SCSI device
                  1 = /dev/sg1          Second generic SCSI device
                    ...

                Most distributions name these /dev/sga, /dev/sgb...;
                this sets an unnecessary limit of 26 SCSI devices in
                the system and is counter to standard Linux
                device-naming practice.
...
 86 char        SCSI media changer
                  0 = /dev/sch0         First SCSI media changer
                  1 = /dev/sch1         Second SCSI media changer
                    ...



--mm                                                            Michael Mráka