Re: Removing an unwanted RAID 1 array
On Sat, 11 Jan 2025, Greg Wooledge wrote:
> On Sat, Jan 11, 2025 at 13:10:51 +0100, Roger Price wrote:
> > On Sat, 11 Jan 2025, Michel Verdier wrote:
> >
> > > If I remember well you have to first set the device as faulty with --fail
> > > before --remove could be accepted.
> >
> > No luck :
> >
> > root@titan ~ mdadm --fail /dev/md4 --remove /dev/sdb7
> > mdadm: hot remove failed for /dev/sdb7: Device or resource busy
>
> Is it mounted? Is it being used as swap?
No it's not mounted - I ran umount /dev/md4. It's not being used as swap.
rprice@titan ~ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
...
└─sdb7 8:23 0 20G 0 part
└─md124 9:124 0 20G 0 raid1
I tried commenting out the entry for md4 in /etc/mdadm/mdadm.conf . I then ran
update-initramfs -u as instructed in the mdadm.conf file.
I then rebooted, but md4 reappeared as /dev/md124.
Roger
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