00:11.0 SATA controller: ATI Technologies Inc SB700/SB800 SATA Controller [AHCI mode] (prog-if 01 [AHCI 1.0])

lrwxrwxrwx 1 root root  9 2011-12-10 10:25 pci-0000:00:11.0-scsi-0:0:0:0 -> ../../sdb

lrwxrwxrwx 1 root root  9 2011-12-10 10:25 pci-0000:00:11.0-scsi-2:0:0:0 -> ../../sdc

lrwxrwxrwx 1 root root  9 2011-12-10 10:25 pci-0000:00:11.0-scsi-6:0:0:0 -> ../../sdd

lrwxrwxrwx 1 root root  9 2011-12-10 10:25 pci-0000:00:11.0-scsi-7:0:0:0 -> ../../sde

lrwxrwxrwx 1 root root  9 2011-12-10 10:25 pci-0000:00:11.0-scsi-8:0:0:0 -> ../../sdf

 

02:00.0 RAID bus controller: Adaptec Serial ATA II RAID 1430SA (rev 02)

lrwxrwxrwx 1 root root  9 2011-12-10 10:25 pci-0000:02:00.0-scsi-0:0:0:0 -> ../../sdg

lrwxrwxrwx 1 root root  9 2011-12-10 10:25 pci-0000:02:00.0-scsi-2:0:0:0 -> ../../sdh

lrwxrwxrwx 1 root root  9 2011-12-10 10:25 pci-0000:02:00.0-scsi-3:0:0:0 -> ../../sdi

lrwxrwxrwx 1 root root  9 2011-12-10 10:25 pci-0000:02:00.0-scsi-8:0:0:0 -> ../../sdj

 

04:06.0 RAID bus controller: Silicon Image, Inc. SiI 3112 [sATALink/SATARaid] Serial ATA Controller (rev 02)

lrwxrwxrwx 1 root root  9 2011-12-10 10:25 pci-0000:04:06.0-scsi-0:0:0:0 -> ../../sdk

 

2 drives ;-)

 

cache: 10240000000 bytes (10 GB) copied, 249.897 s, 41.0 MB/s

DISK2: (sdh) 10240000000 bytes (10 GB) copied, 356.91 s, 28.7 MB/s

 

Disk 8  (sdb)10240000000 bytes (10 GB) copied, 338.036 s, 30.3 MB/s

 

So this is about right, Although I would have expected the cache drive to perform a little better.

Perhaps it's the other traffic keeping it busy.

 

Where is your parity drive?

 

My parity are on /dev/sdg