misc/77826: ext2fs usb filesystem will not mount RW

Tom Oakes eoakes at comcast.net
Mon Feb 21 04:00:48 GMT 2005

>Number:         77826
>Category:       misc
>Synopsis:       ext2fs usb filesystem will not mount RW
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Feb 21 04:00:47 GMT 2005
>Originator:     Tom Oakes
>Release:        4.9 and FreeSBIE(5.3)
FreeBSD freesbie.livecd 5.3-RELEASE-p2 FreeBSD 5.3-RELEASE-p2 #5: Thu Dec  2 19:22:53 CET 2004     root at athlon.casadamico.net:/usr/obj/usr/src/sys/FREESBIE  i386   

FreeBSD 4.9 on the same hardware does the same thing. I can not get the uname -a for that version as I can only be booted in one or the other.

      An attached USB Maxor 160 gig drive is divided into 3 partitions. Partition 1 and 2 are ext2fs and partition 3 is msdos.freesbie at freesbie:~# umount /mnt/usb.0
freesbie at freesbie:~# mount -t ext2fs  /dev/da0s1 /mnt/usb.0
ext2fs: /dev/da0s1: Operation not permitted
 mount -t ext2fs -r  /dev/da0s1 /mnt/usb.0
/dev/da0s3 on /mnt/dos.2 (msdosfs, local)
/dev/da0s1 on /mnt/usb.0 (ext2fs, local, read-only)
freesbie at freesbie:~# mount -uw /dev/da0s1
ext2fs: /dev/da0s1: Operation not permitted

In short the msdos partition will mount read/write but the ext2fs will only mount read only.

I see the same or a very similar problem using freeBSD 4.9

The ext2 partition mount read/write under Redhat Linux 9.0 sucessfully.

      Any time I connect the drive to a freeBSD system on this hardware I see the same problem.
      I have not located any fix or reference to this problem searching the internet.

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