When trying to develop plans to repurpose machines and not being the sys admin that setup the machines is a difficult task. Part of the plan is to audit the hardware and their current configuration.
Memory, CPU, partitions, etc are easy parameters to determine in FreeBSD; hardware RAID on the other is not so simple.

To get most of the details, the SysInfo script makes this a breeze. (Make sure to install sysutils/dmidecode)

As for the current RAID configuration, it depends on your RAID adapter. I stumbled upon this gem FreeBSD RAID Monitoring by Nico Schottelius. It provides a nice list of different methods of finding this information.

For AMCC or 3ware adapters, sysutils/tw_cli is a simple utility

# tw_cli info

Ctl   Model        (V)Ports  Drives   Units   NotOpt  RRate   VRate  BBU
------------------------------------------------------------------------
c0    9650SE-8LPML 8         4        2       0       1       1      OK

# tw_cli info c0

Unit  UnitType  Status         %RCmpl  %V/I/M  Stripe  Size(GB)  Cache  AVrfy
------------------------------------------------------------------------------
u0    RAID-1    OK             -       -       -       698.481   ON     OFF    
u1    RAID-1    OK             -       -       -       698.481   ON     OFF    

Port   Status           Unit   Size        Blocks        Serial
---------------------------------------------------------------
p0     OK               u0     698.63 GB   1465149168    5QK03R9K            
p1     OK               u0     698.63 GB   1465149168    5QK07SEE            
p2     OK               u1     698.63 GB   1465149168    5QK05X5G            
p3     OK               u1     698.63 GB   1465149168    5QK07XTM            
p4     NOT-PRESENT      -      -           -             -
p5     NOT-PRESENT      -      -           -             -
p6     NOT-PRESENT      -      -           -             -
p7     NOT-PRESENT      -      -           -             -

Name  OnlineState  BBUReady  Status    Volt     Temp     Hours  LastCapTest
---------------------------------------------------------------------------
bbu   On           Yes       OK        OK       OK       0      xx-xxx-xxxx 

For LSI, sysutils/megacli

# MegaCli -LDInfo -LAll -aAll

Adapter 0 -- Virtual Drive Information:
Virtual Disk: 0 (Target Id: 0)
Name:
RAID Level: Primary-1, Secondary-0, RAID Level Qualifier-0
Size:407.917 GB
State: Optimal
Stripe Size: 64 KB
Number Of Drives per span:2
Span Depth:3
Default Cache Policy: WriteBack, ReadAheadNone, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAheadNone, Direct, No Write Cache if Bad BBU
Access Policy: Read/Write
Disk Cache Policy: Disabled
Encryption Type: None

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