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Monitor Hardware RAID

I just installed FreeBSD 7.2 on a Dell T100 PowerEdge server with 2
500GB SATA drives. The server has the Dell sas6ir RAID controller card. The output from dmesg shows RAID 1 enabled and both disk are healthy. My question is this...How can I be sure that the RAID is
functioning properly and/or how can I monitor the RAID device for failures etc..? I'm new
to FreeBSD so forgive me if this is a simple question. Thanks

dmesg|grep mpt
mpt0: <LSILogic SAS/SATA Adapter> port 0xec00-0xecff mem 0xdfdec000-0xdfdeffff,0xdfdf0000-0xdfdfffff irq 16 at device 0.0 on pci1
mpt0: [ITHREAD]
mpt0: MPI Version=
mpt0: Capabilities: ( RAID-0 RAID-1E RAID-1 )
mpt0: 1 Active Volume (2 Max)
mpt0: 2 Hidden Drive Members (14 Max)
mpt0:vol0(mpt0:0:0): Settings ( Member-WCE Hot-Plug-Spares High-Priority-ReSync )
mpt0:vol0(mpt0:0:0): Using Spare Pool: 0
mpt0:vol0(mpt0:0:0): 2 Members:
      (mpt0:1:8:0): Primary Online
      (mpt0:1:1:0): Secondary Online
mpt0:vol0(mpt0:0:0): RAID-1 - Optimal
mpt0:vol0(mpt0:0:0): Status ( Enabled )
(mpt0:vol0:1): Physical (mpt0:0:1:0), Pass-thru (mpt0:1:0:0)
(mpt0:vol0:1): Online
(mpt0:vol0:0): Physical (mpt0:0:8:0), Pass-thru (mpt0:1:1:0)
(mpt0:vol0:0): Online
da0 at mpt0 bus 0 target 0 lun 

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