Originally posted by: kami
I recently setup a gigabit network in my place (for a 1.5 terabyte file server. it's actually needed....not a novelty thing) and got a 5 port SMC gigabit switch. SMC also makes an 8 port version...so does Linksys. It works fine, and I am getting close to gigabit speeds with cat5 cable. Actually I'm not sure if it's my hard drive or the network limiting the speed. This thing is freakin fast.
Anyway all the PC's use Intel Pro1000 NIC's. They work great and are cheap.
We need to talk. I just built an IDE RAID5 fileserver (Six 120GB Western Digital Special Edition drives on a Promise SuperTrak SX6000). I am also considering Gigabit. Anyway, I'm in a weird situation: I plan to use it to backup all my other PCs weekly (Network Ghost of a 30GB laptop and 40GB desktop) and host a file repository and CD/DVD-Image archive for all computers (To be run from the network via Daemon-Tools; the best virtual DVD rom ever). The problem is that I just did it on an Intel D850GB which has a maximum PCI bandwidth of ~90MB/s...
Page 12, errata 5
"Intel® 82850/82850E MCH
5. Sustained PCI Bandwidth
Problem: During a memory read multiple operation, a PCI master will read more than one complete cache
line from memory. In this situation, the MCH pre-fetches information from memory in order to
provide optimal performance. However, the MCH cannot provide information to the PCI master
fast enough. Therefore, the Intel® 82801BA terminates the read cycle early to free up the PCI bus
for other PCI masters to claim.
Implication: The early termination limits the maximum bandwidth to ~90 MB/s.
Workaround: None
Status: There are no plans to fix this erratum."
After PCI bus overhead, I suspect it will be closer to what I've heard reported from other sources: 80MB/s maximum transfer throughput. PCI bandwidth @ 133MB/s is already a major factor discouraging an upgrade to Gigabit, so this only exasperates the problem. The fact that I'm running six IDE channels off of the same bus means that it will certainly be more than saturated. The file transfers over Gigabit, like Fast Ethernet, will be going straight to the drives on the same bus thereby doubling the traffic on the bus. A motherboard upgrade is not something I plan on doing for the system designated as the fileserver (A fileserver is the only thing a 1.3GHz P4 system is good for). The SX6000 will have 256MB of onboard cache memory in addition to the 8x6MB included on the drives, but that will only be useful for file transfers once I get a removable HDD in there as I doubt the drives will ever be a bottleneck through the other methods. I will be running Windows Server 2003.
As you can see, my usage is very bandwidth intensive and will benefit from any increase in network performance, but I must ask: How much? Do you think Gigabit will simply steal all the PCI bandwidth and severely bottleneck the drive array or will it sort of balance out? Overall, will it be worth it for the cost of two Netgear cards and a crossover cable? Would it still be worth it after throwing in the Linksys switch (~$160)? My brother seems very interested in firewire networking, though I don't want the fileserver on the same floor and we would need to buy all the equipment for that too (PCI card, hubs, cables, etc). That isn't a good alternative, is it?
Thnx!
EDIT: This is
so why I was hoping someone would make an AGP Gigabit card
Originally posted by: amdfanboy
Sound ? In a switch ?? The
y're putting fans in everything nowdays.
I have a large plain-old hub with a loud fan in it. It stopped working too.