i have dual boot p3 850mhz/320mb ram/2 hardisk(80+20gb) pc. i use windows xp. this is my first experince with linux. i have installed ubuntu 7.04. my cd-r/rw drive behaves funnily. it is unable to read my cd. if i insert my cd, the drive will hum but i cannot read my data(irrespective of the format). however,after inserting my cd if i restart my pc or if i insert my cd at the time of booting then it is perfectly read by my drive. but as soon as i eject my cd-r/rw drive and insert another cd or re-insert the same cd the drive fails to read the cd. the drive works perfectly under windows. i use smsung cd-r/rw 252F using google i have been able to do the following commands: mahesh@mahesh:~$ ls -l /dev/cdrom lrwxrwxrwx 1 root root 4 2007-05-23 16:26 /dev/cdrom -> scd0 mahesh@mahesh:~$ sudo mount /dev/scd0 /media/cdrom0 mount: No medium found mahesh@mahesh:~$ sudo mount /dev/cdrom /media/cdrom0 mount: No medium found mahesh@mahesh:~$ sudo mount /dev/hdb /media/cdrom0 mount: special device /dev/hdb does not exist the contents of my /etc/fstab/ file are: # /etc/fstab: static file system information. # # proc /proc proc defaults 0 0 # /dev/sdb1 UUID=683d08e8-3c07-4a7d-93a7-7843b74d5e3f / ext3 defaults,errors=remount-ro 0 1 # /dev/sdb5 UUID=944af908-e7e3-4aea-b454-6f424e358394 none swap sw 0 0 /dev/scd0 /media/cdrom0 udf,iso9660 user,noauto 0 0 /dev/fd0 /media/floppy0 auto rw,user,noauto 0 0 the contens of my /etc/fstab.pre-uuid/ are: # UNCONFIGURED FSTAB FOR BASE SYSTEM the contents of my /usr/share/ubuntu-docs/ubuntu/sample/fstab_automountfs/ are: # /etc/fstab: static file system information. # # proc /proc proc defaults 0 0 /dev/hda2 / ext3 defaults,errors=remount-ro 0 1 /dev/hda5 none swap sw 0 0 /dev/hdb /media/cdrom0 udf,iso9660 ro,user,noauto 0 0 /dev/fd0 /media/floppy0 auto rw,user,noauto 0 0 /dev/hda1 /media/windows ntfs umask=0222 0 0 the contents of my /usr/share/ubuntu-docs/ubuntu/sample/fstab_automountnetworkfolders/ are: # /etc/fstab: static file system information. # # proc /proc proc defaults 0 0 /dev/hda2 / ext3 defaults,errors=remount-ro 0 1 /dev/hda5 none swap sw 0 0 /dev/hdb /media/cdrom0 udf,iso9660 ro,user,noauto 0 0 /dev/fd0 /media/floppy0 auto rw,user,noauto 0 0 //192.168.0.1/linux /media/sharename smbfs credentials=/root/.smbcredentials 0 0 the contents of my /usr/share/ubuntu-docs/ubuntu/sample/fstab_automountnetworkfoldersall/ are: # /etc/fstab: static file system information. # # proc /proc proc defaults 0 0 /dev/hda2 / ext3 defaults,errors=remount-ro 0 1 /dev/hda5 none swap sw 0 0 /dev/hdb /media/cdrom0 udf,iso9660 ro,user,noauto 0 0 /dev/fd0 /media/floppy0 auto rw,user,noauto 0 0 //192.168.0.1/linux /media/sharename smbfs credentials=/root/.smbcredentials,dmask=777,fmask=777 0 0 the contents of my /usr/share/ubuntu-docs/ubuntu/sample/fstab_automountfat/ are: # /etc/fstab: static file system information. # # proc /proc proc defaults 0 0 /dev/hda2 / ext3 defaults,errors=remount-ro 0 1 /dev/hda5 none swap sw 0 0 /dev/hdb /media/cdrom0 udf,iso9660 ro,user,noauto 0 0 /dev/fd0 /media/floppy0 auto rw,user,noauto 0 0 /dev/hda1 /media/windows vfat umask=000 0 0 i have got all these files after searching “fstab” in the “file system”. Please note that /dev/hdb does not exist on the system. I was not able to find it throug search or going to /dev through nautilus even after pressing ctrl+h(show hidden files).The only devices mentioned in the directory were: /dev/cdrom /dev/cdrw /dev/scd0 the other typical thing I found was that if we type computer:/// in the file browser i can see all the drives including cd-rw drive. on right clicking on cd-rw drive and going through its properties/permissions/ I found the following: owner: unknown access:read only group:unknwn access:read only others:unknown access:read only execute:unchecked selinux:unknown last changed:unknown any changes i tried to effect by using my mouse gave an error message “permission cannot be changed”. on going through properties/drive i found out: vendor: samsung model:cd r/rw 252F serial: firmware:R804 connection:SCSI media:cd-rw drive removeable:Yes(ejectable) external:no settings: mount point: file system: mount options: should i make any changes here.? if any changes are to be made then how? i typed the following: mahesh@mahesh:gksudo nautilus but on typing computer:/// the only drive i could access was file system . what do i do next?

When	Who	Action	New State
2007-05-23	Benoit Malet	Answer	Answered
2007-05-23	jatan	Reopen	Open
2007-05-27	Hanusz leszek	Answer	Answered
2007-05-29	jatan	Reopen	Open
2007-06-01	Vo Hai	Answer	Answered
2007-06-07	jatan	Confirm	Solved

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