[c-nsp] How important is the HW revision of a module?

[Pete Lumbis]

HW Rev numbers are increased anytime anything is changed with regards to
the hardware (layout). If the capacitor was from Vendor A and is not Vendor
B, but it's the same functional capacitor, that's a new revision. If we
move the dimm slot over 0.02mm on the board, that's a new revision.
Generally these changes are made due to logistical reasons (vendor change,
unable to use the same element (e.g., lead) in construction).

If the HW Revision was due to a failure or problem scenario this would be
handled under a field notice. If there was a functional change it would be
a different part (e.g., EARL 7 on sup720 vs. EARL 7.5 on rsp720).




On Thu, Feb 14, 2013 at 10:47 AM, Jeffrey G. Fitzwater
<jfitz at princeton.edu>wrote:

> How concerned should I be about the HW and FW revisions?  2.2 to 4.3 seems
> pretty far apart.
>
>
>
> Here are two CEF720 24 port 1000mb SFP   WS-X6724-SFP  modules.  One is
> our current running and the other is from used market for  lab testing.
>
>
>
> Mod MAC addresses                             Hw    Fw                  Sw
>                   Status
>
> USED MARKET for TESTING
> 0013.1972.6828 to 0013.1972.683f   2.2   12.2(14r)S5  12.2(33)SXI7 Ok
>
>
> PRODUCTION
> 8843.e1aa.a5e8 to 8843.e1aa.a5ff    4.3   12.2(18r)S1  12.2(33)SXI7 Ok
>
>
>
> I guess I could ask TAC what the revisions changed or fixed.
>
>
>
>
> Thanks for any help.
>
>
>
> Jeff Fitzwater
> OIT Network Systems
> Princeton University
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