few days ago when i connected my n900, on a windows machine( as am using Ubuntu). it gave me a maasge that the disk( which i named my internal memory as C4RL05) has got some error. so it recommended me to scan and fix for errors which i did, bt it continued to gave me the same error on reconncting it, xo i decided to format my 27gb partition using ubuntu which was few days ago. but today am wondering whenever i try to delete anything reside in my internal memory the file manager gave me an error that, Can not delete 'filename.extension OR directory', 'filename.extension OR directory' is a Read-Only file system. i tried to change permission of stuffs using the chmod command on xterminal but the same error came out. But when i use my pc to delete stuffs the operation goes wel, the problem comes whe i use n900 filemanager.
Anyone to help me please

you memory is currupted search this around and you will find a sloution
i did this before..

@c4rl05,

How did you format the partition under Ubuntu? Hopefully as VFAT (FAT32).

If you for some reason formatted it as ext2/3/4 then you know the reason for your problems. Namely the files are most probably owned by your Ubuntu userid, not by N900 anymore.

Please run, as root on your N900: sfdisk -l (<- that's a lowercase L).
and post the results here.

i searched, and i got the solution and it worked, i can now delete stuffz

@reinob, i typed the command i get dis output,
-sh: sfdisk: not found

Would you mind posting the solution here? This way other people might be able to find the solution..

First run "root", and then "sfdisk -l"

the output of the command:

Device Boot Start End #cyls #blocks Id System
/dev/mmcblk0p1 1 884864 884864 28315648 c W95 FAT32 (LBA)
/dev/mmcblk0p2 884865 950400 65536 2097152 83 Linux
/dev/mmcblk0p3 950401 974976 24576 786432 82 Linux swap / Solaris

go to terminal run these commands:

root
unmount /dev/mmcblk0p1
fsck.vfat -aw /dev/mmcblk0p1
reboot

and your memory will be fine now.

BEST WAY
connect ua phone in mass storage on pc..and dn scan for viruses and then go to my computer right click on disk and go to properties then in tools press on check now and click on automatically fix file system errors and dn click on start...it workd for me