>I use the EISA card from 3COM, the 3C579, and it works well. It is
>not Bus-Mastering, but that makes little difference on my Novell
>servers, so I doubt it does here either. I have done FTP's between
>my Linux and VAX 3195, and have at times obtained 950K/sec on transfers.
>I get 890 K/sec write from a WS with 3C579 to my Novell 3.12 server with
>a busmaster EISA card.
Now this is interesting; I've not yet decided whether to purchase a
3c579, or a 3c509 and run it in the 509's "EISA-compatibility mode".
For the record, I have a 16Mb Dell 466/ME EISA box, with a AHA-1740,
2.75Gb of storage, and I use it as fileserver for a trio of diskless
Sun workstations. I currently have a crummy 8-bit 3c503 that's holding
me back because it drops so many UDP fragments, the Sun systems hang
quite frequently, especially when swapping over NFS.
I've checked 3Com's CardFax service, asked around, and generally been
snooping, but have not yet established whether there's any significant
advantage in paying the overhead for a *real* EISA card - the '579.
The only advantage I can see is that (presumably) memory access to/from
the card's I/O buffers would be 32-bits wide on the '579, 16-bits wide
on the '509 in EISA mode. Kindly correct me if this is wrong.
Both cards suffer from small Rx buffers, both have the 16-bit chipset,
and as far as I know, there's zippo difference between them, barring
the edge connector.
I don't suppose anyone has any comment upon whether the 579's native
"EISA nature" gives me functionality that is worth the extra cost ?
Further: if there is an advantage, does the Linux driver utilise it ?
Alec Muffett "The Unix that is marketable,
Sun Microsystems (UK) is not the true Unix"
Network Security Group
(speaking for himself, not his employers)