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how-do-i-check-health-my-3ware-raid-array.md

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2018-04-02

{:shortdesc: .shortdesc} {:new_window: target="_blank"}

Checking the health of your 3ware RAID array

With 3ware, you can use a browser interface. However, unless you access the interface locally, it can be a security risk. Therefore, you use the command line interface.

Quick command reference for 3ware CLI tools

These devices must be followed by a number that identifies which devices is being queried.

tw_cli /c0 show (Output shows information that is needed to know the health of the RAID array)

./tw_cli /c1 show

Example:

Unit  UnitType  Status         %Cmpl  Stripe  Size(GB)  Cache  AVerify  IgnECC

------------------------------------------------------------------------------

u0    RAID-5    OK             -      64K     465.641   OFF    OFF      OFF    

Port   Status           Unit   Size        Blocks        Serial

---------------------------------------------------------------

p0     OK               u0     233.76 GB   490234752     WD-WCANY1727093

p1     OK               u0     233.76 GB   490234752     WD-WCANY1622544

p2     OK               u0     233.76 GB   490234752     WD-WCANY1657267

p3     NOT-PRESENT      -      -           -             -

*note the following:

c = controller
Controller can be 0 or 1
u = unit
Unit number depends on number arrays. It is 0 in most cases.
p = port
Port denotes port number. In most cases, it is 0-4.