очень низкие значения hdparm -t на RAID5

# time hdparm -tT /dev/sda

/dev/sda:
 Timing cached reads:   1204 MB in  2.00 seconds = 602.31 MB/sec
 Timing buffered disk reads:    2 MB in  4.65 seconds = 440.01 kB/sec

real    2m3.018s
user    0m0.224s
sys     0m1.796s

# dmesg | grep scsi
scsi0 : ata_piix
scsi1 : ata_piix
scsi 0:0:0:0: CD-ROM            ASUS     DVD-E616A3       1.01 PQ: 0 ANSI: 5
scsi2 : aacraid
scsi 2:0:0:0: Direct-Access     ADAPTEC  Adaptec RAID5    V1.0 PQ: 0 ANSI: 2
scsi 2:1:0:0: Direct-Access     SEAGATE  ST336607LC       0007 PQ: 0 ANSI: 3
scsi 2:1:1:0: Direct-Access     SEAGATE  ST336807LC       0C01 PQ: 0 ANSI: 3
scsi 2:1:2:0: Direct-Access     SEAGATE  ST336607LC       0007 PQ: 0 ANSI: 3
scsi 2:1:3:0: Direct-Access     IBM      DDYS-T36950M     S9YB PQ: 0 ANSI: 3
scsi 2:1:4:0: Direct-Access     SEAGATE  ST336607LC       0007 PQ: 0 ANSI: 3
scsi 2:1:6:0: Processor         ESG-SHV  SCA HSBP M15     0.10 PQ: 0 ANSI: 2
scsi 0:0:0:0: Attached scsi generic sg0 type 5
sd 2:0:0:0: Attached scsi generic sg1 type 0
scsi 2:1:0:0: Attached scsi generic sg2 type 0
scsi 2:1:1:0: Attached scsi generic sg3 type 0
scsi 2:1:2:0: Attached scsi generic sg4 type 0
scsi 2:1:3:0: Attached scsi generic sg5 type 0
scsi 2:1:4:0: Attached scsi generic sg6 type 0
scsi 2:1:6:0: Attached scsi generic sg7 type 3
sr0: scsi3-mmc drive: 78x/78x cd/rw xa/form2 cdda tray
sr 0:0:0:0: Attached scsi CD-ROM sr0

# uname -a
Linux proxy 2.6.22.5-31-bigsmp #1 SMP 2007/09/21 22:29:00 UTC i686 i686 i386 GNU/Linux

# lspci
00:00.0 Host bridge: Intel Corporation E7501 Memory Controller Hub (rev 01)
00:00.1 Class Class ff00: Intel Corporation E7500/E7501 Host RASUM Controller (rev 01)
00:03.0 PCI bridge: Intel Corporation E7500/E7501 Hub Interface C PCI-to-PCI Bridge (rev 01)
00:03.1 Class Class ff00: Intel Corporation E7500/E7501 Hub Interface C RASUM Controller (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801CA/CAM USB Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801CA/CAM USB Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801CA/CAM USB Controller #3 (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 42)
00:1f.0 ISA bridge: Intel Corporation 82801CA LPC Interface Controller (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801CA Ultra ATA Storage Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801CA/CAM SMBus Controller (rev 02)
01:0c.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27)
02:1c.0 PIC: Intel Corporation 82870P2 P64H2 I/OxAPIC (rev 04)
02:1d.0 PCI bridge: Intel Corporation 82870P2 P64H2 Hub PCI Bridge (rev 04)
02:1e.0 PIC: Intel Corporation 82870P2 P64H2 I/OxAPIC (rev 04)
02:1f.0 PCI bridge: Intel Corporation 82870P2 P64H2 Hub PCI Bridge (rev 04)
04:02.0 RAID bus controller: Adaptec AAC-RAID (rev 01)
04:05.0 Ethernet controller: Intel Corporation 82546EB Gigabit Ethernet Controller (Copper) (rev 01)
04:05.1 Ethernet controller: Intel Corporation 82546EB Gigabit Ethernet Controller (Copper) (rev 01)

openSUSE 10.3