I've added a new, single IDE disk to a system. I've run though fdisk,
mkfs and then attempted a mount command but mount failed with "already
mounted or /mnt/ busy". I see that now device-mapper is "claiming" this
disk and newly created partitions and doesn't allow me to mount the
partitions by addressing the /dev/hdb1 device file. In other words,
/dev/mapper files are being automatically created only for this (new)
disk. Is there a way to have device-mapper relinquish control of this
disk?
I've tried removing and clearing the devices with dmsetup, all to no avail.
Thanks much,
Paul
(device files removed and no paritions present on /dev/hdb):
[root@server ~]# ls -l /dev/mapper/
total 0
crw------- 1 root root 10, 63 Apr 9 12:03 control
(after a reboot a new device appears (for the hdb device?))
[root@server ~]# ls -l /dev/mapper/
total 0
crw------- 1 root root 10, 63 Apr 9 15:04 control
brw-rw---- 1 root disk 253, 0 Apr 9 15:04 pdc_bjajcgbifh
(Now fdisk, create a new primary partition, mkfs, and then mount attempted):
[root@server ~]# mount /dev/hdb1 /mnt/
mount: /dev/hdb1 already mounted or /mnt/ busy
(no device for the new partition, yet)
[root@server ~]# ls -l /dev/mapper
total 0
crw------- 1 root root 10, 63 Apr 9 15:04 control
brw-rw---- 1 root disk 253, 0 Apr 9 15:04 pdc_bjajcgbifh
(..but after a reboot, a new mapper device is present)
[root@server ~]# ls -l /dev/mapper
total 0
crw------- 1 root root 10, 63 Apr 9 15:54 control
brw-rw---- 1 root disk 253, 0 Apr 9 15:54 pdc_bjajcgbifh
brw-rw---- 1 root disk 253, 1 Apr 9 15:54 pdc_bjajcgbifh1
(still can't mount using traditional device)
[root@server ~]# mount /dev/hdb1 /mnt/
mount: /dev/hdb1 already mounted or /mnt/ busy
(...but can using the special mapper device)
[root@server ~]# mount /dev/mapper/pdc_bjajcgbifh1 /mnt
[root@server ~]# df -k
Filesystem 1K-blocks Used Available Use% Mounted on
...
/dev/mapper/pdc_bjajcgbifh1
23078680 77800 23000880 1% /mnt
-------------------------
Linux 2.6.9-42.0.10.ELsmp #1 SMP Tue Feb 27 12:38:15 EST 2007 x86_64
x86_64 x86_64 GNU/Linux
# rpm -q device-mapper
device-mapper-1.02.07-4.0.RHEL4
device-mapper-1.02.07-4.0.RHEL4
64bit and 32bit RPM's installed.
[root@server ~]# fdisk -l
Disk /dev/hdb: 400.0 GB, 400088457216 bytes
255 heads, 63 sectors/track, 48641 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hdb1 1 2919 23446836 83 Linux
Disk /dev/sda: 120.0 GB, 120033075200 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 1044 8385898+ 83 Linux
/dev/sda2 1045 2088 8385930 82 Linux swap
/dev/sda3 2089 3132 8385930 83 Linux
/dev/sda4 3133 14593 92060482+ 5 Extended
/dev/sda5 3133 3654 4192933+ 83 Linux
/dev/sda6 3655 4176 4192933+ 83 Linux
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