Re: ERROR: error removing the device '/dev/sdXN' - Inappropriate ioctl for device

[Martin <m_btrfs@ml1.co.uk>]

On 31/03/15 18:37, David Sterba wrote:
> On Mon, Mar 30, 2015 at 09:59:05PM +0100, Martin wrote:
>> btrfs device delete /dev/sdf5 /mnt/data2
>>
>> ERROR: error removing the device '/dev/sdf5' - Inappropriate ioctl for
>> device
> 
> Strange, that would mean that the ioctl number is not handled at all. I
> haven't found any change in device delete on the userspace side. This
> would mean that /mnt/data2 is not mounted. Did you try to do lazy
> unmount?

Nope, that filesystem is still mounted and in use, but still a very good
deduction...

Trying smartmonctl just now on that drive (/dev/sdf) gives errors
suggesting that the drive is no longer responding at all :-(

There is also a steady repeat of:

kernel: sd 7:0:0:0: [sdf] CDB:
kernel: cdb[0]=0x2a: 2a 00 04 02 45 80 00 00 08 00
kernel: sd 7:0:0:0: [sdf] Unhandled error code
kernel: sd 7:0:0:0: [sdf]
kernel: Result: hostbyte=0x04 driverbyte=0x00

(Must watch that lot doesn't fill the log.)


Should I try a:

btrfs device delete missing /mnt/data2

or do I need to unmount or remount first?


... And the system is live and not to be rebooted if at all possible
until the weekend...

Thanks,
Martin