G'day Todd,
Hmmm very odd, it could be the SAS/Sata card,
The last few entries are below, and so it does look like the Adaptec Raid Controller may be the issue, but we have also had this happen on an Areca 1120(I think it is)...
Also, if the card/disks are at issue, shouldn't the OS be independent of this?
ie why is it failing to load the Web GUI etc.....
It's not that unusual to get faults in SATA class drives, so I would expect this to be a pretty common issue?

Ethernet Channel Bonding Driver: v3.0.3 (March 23, 2006)
bonding: MII link monitoring set to 50 ms
bonding: bond0 is being deleted...
e1000: eth1: e1000_watchdog_task: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
program scsiinfo is using a deprecated SCSI ioctl, please convert it to SG_IO
program scsiinfo is using a deprecated SCSI ioctl, please convert it to SG_IO
program scsiinfo is using a deprecated SCSI ioctl, please convert it to SG_IO
program scsiinfo is using a deprecated SCSI ioctl, please convert it to SG_IO
kjournald starting. Commit interval 5 seconds
EXT3 FS on dm-13, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
drbd: initialised. Version: 0.7.22 (api:79/proto:74)
drbd: SVN Revision: 2575M build by root@develsystem2, 2007-12-06 08:05:37
drbd: registered as block device major 147
kjournald starting. Commit interval 5 seconds
EXT3 FS on ram15, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
program scsiinfo is using a deprecated SCSI ioctl, please convert it to SG_IO
program scsiinfo is using a deprecated SCSI ioctl, please convert it to SG_IO
kjournald starting. Commit interval 5 seconds
EXT3 FS on dm-7, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
Filesystem "dm-10": Disabling barriers, not supported by the underlying device
XFS mounting filesystem dm-10
Ending clean XFS mount for filesystem: dm-10
Filesystem "dm-11": Disabling barriers, not supported by the underlying device
XFS mounting filesystem dm-11
Ending clean XFS mount for filesystem: dm-11
Filesystem "dm-12": Disabling barriers, not supported by the underlying device
XFS mounting filesystem dm-12
Ending clean XFS mount for filesystem: dm-12
Adding 4194296k swap on /dev/vg+vg00/nas_swap. Priority:-1 extents:1 across:4194296k
NET: Registered protocol family 10
ADDRCONF(NETDEV_UP): eth0: link is not ready
IPv6 over IPv4 tunneling driver
scst: Attached SCSI target mid-level at scsi0, channel 0, id 0, lun 0, type 0
scst: Attached SCSI target mid-level at scsi1, channel 0, id 0, lun 0, type 0
scst: Attached SCSI target mid-level at scsi4, channel 0, id 0, lun 0, type 0
scst: Attached SCSI target mid-level at scsi4, channel 1, id 0, lun 0, type 0
scst: Attached SCSI target mid-level at scsi4, channel 1, id 4, lun 0, type 0
scst: Attached SCSI target mid-level at scsi4, channel 1, id 5, lun 0, type 0
scst: Attached SCSI target mid-level at scsi4, channel 1, id 6, lun 0, type 0
scst: Attached SCSI target mid-level at scsi4, channel 1, id 7, lun 0, type 0
scst: SCST version 0.9.5.2 loaded successfully (max mem for commands 1010 Mb)
scst: Device handler disk_fileio for type 0 loaded successfully
scst: Device handler cdrom_fileio for type 5 loaded successfully
eth1: no IPv6 routers present
Fusion MPT base driver 3.03.09
Copyright (c) 1999-2005 LSI Logic Corporation
Fusion MPT misc device (ioctl) driver 3.03.09
mptctl: Registered with Fusion MPT base driver
mptctl: /dev/mptctl @ (major,minor=10,220)
iSCSI Enterprise Target Software - version 0.4.15
iotype_init(92) register fileio
iotype_init(92) register blockio
iotype_init(92) register nullio
aacraid: Host adapter reset request. SCSI hang ?
aacraid: Host adapter reset request. SCSI hang ?
aacraid: Host adapter reset request. SCSI hang ?