software raid question 2

[vu pham]

Raid Gurus:

I get into this problem twice, solved one this mornining, but still 
playing around with this one.

When I create an raid device, mdadm complains one or more partitions 
"device or resource busy".

[root at wks-178 ~]# mdadm --create /dev/md0 --level=5 --raid-devices=3 
/dev/sdb1 /dev/sdc1 /dev/sdd1
mdadm: Cannot open /dev/sdb1: Device or resource busy
mdadm: /dev/sdc1 appears to contain an ext2fs file system
     size=104320K  mtime=Fri Aug  8 08:26:43 2008
mdadm: /dev/sdd1 appears to contain an ext2fs file system
     size=104320K  mtime=Fri Aug  8 08:26:43 2008
mdadm: create aborted


This morning, after googling, I used "mdadm --stop /dev/md0 ( or 
/dev/md1, md2 ) to fix it. And I could be able to create md0, md1, md2.

Now I clear all the partitions and do again but it fails.

Below is my fdisk -l.
/dev/sdb, /dev/sdc and /dev/sdd are used for software raid.
/dev/sda just for booting and loading Linux.

Thanks,

Vu




[root at wks-178 ~]# fdisk -l

Disk /dev/sda: 146.1 GB, 146163105792 bytes
255 heads, 63 sectors/track, 17769 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          13      104391   83  Linux
/dev/sda2             275       17769   140528587+  83  Linux
/dev/sda3              14         274     2096482+  82  Linux swap / Solaris

Partition table entries are not in disk order

Disk /dev/sdb: 146.1 GB, 146163105792 bytes
255 heads, 63 sectors/track, 17769 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1        4863    39062016   fd  Linux raid 
autodetect
/dev/sdb2            4864       12158    58597087+  fd  Linux raid 
autodetect
/dev/sdb3           12159       17770    45078273   fd  Linux raid 
autodetect

Disk /dev/sdc: 146.1 GB, 146163105792 bytes
255 heads, 63 sectors/track, 17769 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1        4863    39062016   fd  Linux raid 
autodetect
/dev/sdc2            4864       12158    58597087+  fd  Linux raid 
autodetect
/dev/sdc3           12159       17770    45078273   fd  Linux raid 
autodetect

Disk /dev/sdd: 146.1 GB, 146163105792 bytes
255 heads, 63 sectors/track, 17769 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1        4863    39062016   fd  Linux raid 
autodetect
/dev/sdd2            4864       12158    58597087+  fd  Linux raid 
autodetect
/dev/sdd3           12159       17770    45078273   fd  Linux raid 
autodetect