[c-nsp] Supervisor 32 Compact Flash

[Buhrmaster, Gary]

> The lastest results from people who've tried the internal 
> flash upgrade to sup-bootdisk (which is really just a CF 
> with an adapter) are that it still only reads at 1MB/s 
> (the same as every variety of external CF). For some 
> reason, the native internal flash in stock 64mb sup720s seem 
> to do 2MB/s.

Is not the internal flash of the "linear" variety (before
the "upgrade")?  Iff the same flash chips are used, the 
linear variety can almost always be faster since one
can avoid the (usually slow embedded 8051 processor based) 
simulation of an ATA drive (which involves all sorts of
remapping, both of bad blocks, and to not always write
to the same flash sector).

However, that is the technology, not how some vendors
may have implemented it.  In particular, Cisco seems
to use very conservative (and not dynamically adjustable)
timings with their CF card interfaces.  Everything runs
at the (slow) original CF part speeds, even if the part
could do better.  

Gary
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 3376 bytes
Desc: not available
Url : https://puck.nether.net/pipermail/cisco-nsp/attachments/20060810/d1eabe81/attachment-0001.bin