I am trying to build an NAS using Ubuntu Server 10.04. I am using the following system:

Intel/Pentium 4 2.6GHz
1GB Ram
Silicon Image 4 port SATA/RAID controller (fakeRAID)
4 - 1TB HDD

The HDD's are drives I have used in the past to test and build different RAID configs using mdadm. I am trying to build a RAID 1 with 4 disks using the following:

Code:
mdadm -Cv -l1 -n4 /dev/md0 /dev/sd{b,c,d,e}1
When I try this I get a "Device or resource busy" error. When I catalog the /proc/mdstat I get the following:

Quote:
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md3 : active raid10 sdd1[3] sdb1[1] sdc1[0] sda1[2]
1953519872 blocks 64K chunks 2 near-copies [4/4] [UUUU]

unused devices: <none>
And When I examine the partitions with mdadm:
Code:
mdadm --examine /dev/sd{a,b,c,d}1
I get:
Quote:
/dev/sda1:
Magic : a92b4efc
Version : 00.90.00
UUID : 61f714b5:fe18b25f:adc23f65:cc5a51de
Creation Time : Sun Jul 10 02:59:45 2011
Raid Level : raid10
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 1953519872 (1863.02 GiB 2000.40 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 3

Update Time : Mon Oct 17 11:33:19 2011
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 5a46c420 - correct
Events : 98

Layout : near=2, far=1
Chunk Size : 64K

Number Major Minor RaidDevice State
this 2 8 17 2 active sync /dev/sdb1

0 0 8 49 0 active sync /dev/sdd1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 17 2 active sync /dev/sdb1
3 3 8 65 3 active sync /dev/sde1
/dev/sdb1:
Magic : a92b4efc
Version : 00.90.00
UUID : 61f714b5:fe18b25f:adc23f65:cc5a51de
Creation Time : Sun Jul 10 02:59:45 2011
Raid Level : raid10
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 1953519872 (1863.02 GiB 2000.40 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 3

Update Time : Mon Oct 17 11:33:19 2011
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 5a46c42e - correct
Events : 98

Layout : near=2, far=1
Chunk Size : 64K

Number Major Minor RaidDevice State
this 1 8 33 1 active sync /dev/sdc1

0 0 8 49 0 active sync /dev/sdd1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 17 2 active sync /dev/sdb1
3 3 8 65 3 active sync /dev/sde1
/dev/sdc1:
Magic : a92b4efc
Version : 00.90.00
UUID : 61f714b5:fe18b25f:adc23f65:cc5a51de
Creation Time : Sun Jul 10 02:59:45 2011
Raid Level : raid10
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 1953519872 (1863.02 GiB 2000.40 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 3

Update Time : Mon Oct 17 11:33:19 2011
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 5a46c43c - correct
Events : 98

Layout : near=2, far=1
Chunk Size : 64K

Number Major Minor RaidDevice State
this 0 8 49 0 active sync /dev/sdd1

0 0 8 49 0 active sync /dev/sdd1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 17 2 active sync /dev/sdb1
3 3 8 65 3 active sync /dev/sde1
/dev/sdd1:
Magic : a92b4efc
Version : 00.90.00
UUID : 61f714b5:fe18b25f:adc23f65:cc5a51de
Creation Time : Sun Jul 10 02:59:45 2011
Raid Level : raid10
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 1953519872 (1863.02 GiB 2000.40 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 3

Update Time : Mon Oct 17 11:33:19 2011
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 5a46c452 - correct
Events : 98

Layout : near=2, far=1
Chunk Size : 64K

Number Major Minor RaidDevice State
this 3 8 65 3 active sync /dev/sde1

0 0 8 49 0 active sync /dev/sdd1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 17 2 active sync /dev/sdb1
3 3 8 65 3 active sync /dev/sde1
It is indicating that there is a RAID 10 device md3 in existance and active. However I have tried to stop the device with -S command and even tried to zero out the superblock for /dev/sd{a,b,c,d}1 and I get a device busy error again.

I have reformatted the disks and even zeroed them out using dd however it still comes back. I went into the FAKEraid settup just before the BIOS posts and checked the status of the card. It indicates that "No RAID device to delete" when trying to delete any possible configurations in the card. fdisk -l gives the following:

Quote:
isk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00011e81

Device Boot Start End Blocks Id System
/dev/sda1 1 121601 976760001 83 Linux

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x5482f9cf

Device Boot Start End Blocks Id System
/dev/sdb1 1 121601 976760001 83 Linux

Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x2d6b9798

Device Boot Start End Blocks Id System
/dev/sdc1 1 121601 976760001 83 Linux

Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x3d04945c

Device Boot Start End Blocks Id System
/dev/sdd1 1 121601 976760001 83 Linux

Disk /dev/sde: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000997d2

Device Boot Start End Blocks Id System
/dev/sde1 * 1 32 248832 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sde2 32 60802 488134657 5 Extended
/dev/sde5 32 60802 488134656 8e Linux LVM

Disk /dev/md3: 2000.4 GB, 2000404348928 bytes
2 heads, 4 sectors/track, 488379968 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 65536 bytes / 131072 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
Notice the md3 device at the bottom of the fdisk print out.

Any help with this would be greatly appreciated.

Thanks

--
James