Linux gentoo-xen 2.6.18-xen-r12 #3 SMP Tue Oct 5 09:28:53 PDT 2010 x86_64 Intel(R) Xeon(R) CPU E5506 @ 2.13GHz GenuineIntel GNU/Linux

I have 6 disks of 1 TB and i can't see all of them only 4, can anyone give me an ideea what can i do ?

Filesystem            Size  Used Avail Use% Mounted on
rootfs                886G  4.4G  836G   1% /
/dev/sda3             886G  4.4G  836G   1% /
rc-svcdir             1.0M   44K  980K   5% /lib64/rc/init.d
shm                   7.9G     0  7.9G   0% /dev/shm
/dev/sdb1             917G  200M  871G   1% /home2
/dev/sdc1             917G  200M  871G   1% /home3
/dev/sdd1             917G  200M  871G   1% /home4

The hardware is Dual xeon E5506 processors on a supermicro X8DTL mobo

4.346585] ata3.00: ATA-8, max UDMA/133, 1953525168 sectors: LBA48 NCQ (depth 0/32)
[    4.346588] ata3.00: ata3: dev 0 multi count 16
[    4.352861] ata3.00: configured for UDMA/133
[    4.352867] scsi3 : ata_piix
[    4.352875] PM: Adding info for No Bus:host3
[    4.510584] ata4.00: ATA-8, max UDMA/133, 1953525168 sectors: LBA48 NCQ (depth 0/32)
[    4.510587] ata4.00: ata4: dev 0 multi count 16
[    4.516848] ata4.00: configured for UDMA/133
[    4.516861] PM: Adding info for No Bus:target2:0:0
[    4.516905]   Vendor: ATA       Model: SAMSUNG HD103SJ   Rev: 1AJ1
[    4.516910]   Type:   Direct-Access                      ANSI SCSI revision: 05
[    4.516920] PM: Adding info for scsi:2:0:0:0
[    4.517452] SCSI device sde: 1953525168 512-byte hdwr sectors (1000205 MB)
[    4.517460] sde: Write Protect is off
[    4.517461] sde: Mode Sense: 00 3a 00 00
[    4.517478] SCSI device sde: drive cache: write back
[    4.517514] SCSI device sde: 1953525168 512-byte hdwr sectors (1000205 MB)
[    4.517521] sde: Write Protect is off
[    4.517522] sde: Mode Sense: 00 3a 00 00
[    4.517532] SCSI device sde: drive cache: write back
[    4.517534]  sde: sde1
[    4.524551] sd 2:0:0:0: Attached scsi disk sde
[    4.524855] sd 2:0:0:0: Attached scsi generic sg4 type 0
[    4.524874] PM: Adding info for No Bus:target3:0:0
[    4.524928]   Vendor: ATA       Model: SAMSUNG HD103SJ   Rev: 1AJ1
[    4.524933]   Type:   Direct-Access                      ANSI SCSI revision: 05
[    4.524946] PM: Adding info for scsi:3:0:0:0
[    4.525216] SCSI device sdf: 1953525168 512-byte hdwr sectors (1000205 MB)
[    4.525227] sdf: Write Protect is off
[    4.525228] sdf: Mode Sense: 00 3a 00 00
[    4.525242] SCSI device sdf: drive cache: write back
[    4.525280] SCSI device sdf: 1953525168 512-byte hdwr sectors (1000205 MB)
[    4.525286] sdf: Write Protect is off
[    4.525289] sdf: Mode Sense: 00 3a 00 00
[    4.525301] SCSI device sdf: drive cache: write back
[    4.525302]  sdf: sdf1
[    4.532691] sd 3:0:0:0: Attached scsi disk sdf
[    4.533010] sd 3:0:0:0: Attached scsi generic sg5 type 0
[    4.977669] scsi: <fdomain> Detection failed (no card)
[    5.030479] GDT-HA: Storage RAID Controller Driver. Version: 3.05
[    5.030635] GDT-HA: Found 0 PCI Storage RAID Controllers
[    5.372350] Fusion MPT base driver 3.04.01
[    5.372358] Copyright (c) 1999-2005 LSI Logic Corporation
[    5.579176] Fusion MPT SPI Host driver 3.04.01
[    5.881777] ieee1394: Initialized config rom entry `ip1394'
[    6.166745] ieee1394: sbp2: Driver forced to serialize I/O (serialize_io=1)
[    6.166748] ieee1394: sbp2: Try serialize_io=0 for better performance
[    6.428866] md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27
[    6.428872] md: bitmap version 4.39
[    6.431518] md: raid0 personality registered for level 0
[    6.495979] md: raid1 personality registered for level 1
[    6.570270] raid5: automatically using best checksumming function: generic_sse
[    6.575523]    generic_sse:  6608.000 MB/sec
[    6.575526] raid5: using function: generic_sse (6608.000 MB/sec)
[    6.596226] raid6: int64x1   1835 MB/s
[    6.613231] raid6: int64x2   1773 MB/s
[    6.630256] raid6: int64x4   1675 MB/s
[    6.647296] raid6: int64x8   1027 MB/s
[    6.664267] raid6: sse2x1    3578 MB/s
[    6.681268] raid6: sse2x2    4207 MB/s
[    6.698280] raid6: sse2x4    4625 MB/s
[    6.698281] raid6: using algorithm sse2x4 (4625 MB/s)
[    6.698285] md: raid6 personality registered for level 6
[    6.698286] md: raid5 personality registered for level 5
[    6.698288] md: raid4 personality registered for level 4
[    6.781090] md: raid10 personality registered for level 10
[    7.007043] Intel(R) PRO/1000 Network Driver - version 7.1.9-k4
[    7.007046] Copyright (c) 1999-2006 Intel Corporation.
[    9.229465] kjournald starting.  Commit interval 5 seconds
[    9.229476] EXT3-fs: mounted filesystem with ordered data mode.