Two issues - cdrom_id and duplicate /sys entries
First, it seems that /lib/udev/cdrom_id is not exporting correct information about the capabilities of optical media drives. This system contains a Lite-On combo cd writer / dvd reader and an NEC dvd writer drive, but the cdrom_id binary returns this for each of them:
root@isotope:/lib/udev# ./cdrom_id --export /dev/sr{0,1,2,3}
ID_CDROM=1See http://rlworkman.net/attr-walk/ for the udevinfo attribute walks on each of the devices.
Of course, this brings up the second issue: there are only two optical drives in this box, and there are four devices created. 0 and 2 are essentially "mirrors" of one another, as are 1 and 3. Interestingly enough, after dumping the udevinfo output to the files linked above, sr1 and sr3 show different sizes, even though they are the same drive. A diff of the respective files shows a few more things that are different, but none as strange as the size difference... :/
bash-3.2$ grep size sr?-attributes
sr0-attributes: ATTR{size}="2097151"
sr1-attributes: ATTR{size}="4"
sr2-attributes: ATTR{size}="2097151"
sr3-attributes: ATTR{size}="9143552"Ideas? :)
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This is on Slackware -current, but with 2.6.21 kernel and udev-109. Sorry for omitting that the first time... :/
Quoted 28 lines · Robby Workman
First, it seems that
/lib/udev/cdrom_idis not exporting correct information about the capabilities of optical media drives. This system contains a Lite-On combo cd writer / dvd reader and an NEC dvd writer drive, but thecdrom_idbinary returns this for each of them:root@isotope:/lib/udev# ./cdrom_id --export /dev/sr{0,1,2,3} ID_CDROM=1See http://rlworkman.net/attr-walk/ for the udevinfo attribute walks on each of the devices.
Of course, this brings up the second issue: there are only two optical drives in this box, and there are four devices created. 0 and 2 are essentially "mirrors" of one another, as are 1 and 3. Interestingly enough, after dumping the udevinfo output to the files linked above, sr1 and sr3 show different sizes, even though they are the same drive. A diff of the respective files shows a few more things that are different, but none as strange as the size difference... :/
bash-3.2$ grep size sr?-attributes
sr0-attributes: ATTR{size}="2097151" sr1-attributes: ATTR{size}="4" sr2-attributes: ATTR{size}="2097151" sr3-attributes: ATTR{size}="9143552"Ideas? :)
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http://rlworkman.net ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net [email protected] https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel