Re: Why does my drive get set readonly?

On Wednesday June 29, Ruth.Ivimey-Cook@ivimey.org wrote:

Hi,

I'm hoping someone can help suggest where I might look to sort a problem. even 
a pointer is useful!

I have three raid arrays, two raid1 and one raid5 called md2. Basically they 
run fine, but something is switching md2 readonly during the boot process; the 
only way I can get the machine to reboot is to remove md2 from fstab, boot 
single-user, do an "mdadm -w /dev/md2", then "init 5".

I'm running Fedora 3 in a very standard configuration.

Here's the dmesg output (with the new printk timestamp option enabled). Note 
the line just after the block of selinux calls.

What could be setting it readonly?

Odd !!

[4294696.943000] md: md2 switched to read-only mode.

In the mainline kernel, only two thing can cause this to happen.
1/ if an array is still active during shutdown, it will be switched to
   read-only.
2/ if some user-space program call the ioctl equivalent to "mdadm --readonly".

However it is possible that the Fedora-3 kernel does extra stuff
... maybe related to selinux ???

I would suggest asking in a Fedora-specific forum.

(feel froo to quote anything I have said there).

NeilBrown