Subject: dd/fdisk: Read-only file system ???
To: None <firstname.lastname@example.org>
From: Florian Stoehr <email@example.com>
Date: 02/05/2005 02:02:21
root@irina [~] # dd if=/dev/zero of=/dev/rsd0a bs=32k
dd: /dev/rsd0a: Read-only file system
1+0 records in
0+0 records out
0 bytes transferred in 0.001 secs (0 bytes/sec)
root@irina [~] #
Well, it is not even mounted. But since it contains a valid
system, it will mount (rw!) without problems.
Furthermore, an "fdisk sd0", "disklabel sd0" will either give a
"Read-only file system" on the "d" slice (this is i386) if
the "a" slice is not mounted yet, or a
disklabel: Invalid signature in mbr record 0
disklabel: ioctl DIOCGDINFO: Inappropriate ioctl for device
if the partition is mounted.
Hm ... why doesn't that work / why can I still mount that disk???
I'd like to wipe off that disk entirely.
I'm really confused :-(