A question about sczi

[Entity23]

OK, I have a question. I know that ata-100 is 100 meg of data transfer in bursts. Now if a sczi control card is put in a pci slot, and the pci slot has a transfer rate of 33meg/sec, Why is that faster than ata?

 

[esung]

Let's get a few numbers/fact straight.
it's SCSI (Small Computer System Interface), not SCZI.
ATA-100 have a max bandwidth of 100MB/s,
PCI runs at 33Mhz, the bandwidth is 133MB/s at 32bit, and 266MB/s for 64bit PCI
SCSI has many different standards, the fastest being Ultra160, which
has a bandwidth of 160MB/s. (which is slight more then the 32bit PCI bus can handle if it's fully loaded)

So far I don't think any single drive can utilize that much bandwidth over either ATA-100 or Ultra160, the drive can probably do a transfer rate ~20MB/s to 30MB/s sustained(I'm not exactly sure.. too lazy to check the spec sheet)

Why is SCSI faster? SCSI harddrives tend to have higher RPM, larger buffers, and of course, cost a lot more. and SCSI controllers allows multiple access to the HDs simultaneously, where in IDE only 1 device per channel can be access at one time.

 

[Verygreedy]

kudos~! to you. You are correct.

Yes I have a 7200 RPM ATA100 drive and I wont hit over 180 Megabits/sec sustained.. or 22.5 Megabytes/sec. I have seen it burst pretty high but nothing very high as an average. SCSI will cost you since the cards are usually kinda expensive.. and SCSI devices are more expensive as well. not to mention.. terminators and cable w/int.. If you have tons of cash you may want SCSI and get the little benefits but if not get some nice IDE stuff. With my new computer I built I went all IDE.. & this system ROCKS

 

[Entity23]

oh ok. Yeah i guess i did get the units wrong. Thanks for the info. Money, havent seen that in a while

 

[bacillus]

<< Money, havent seen that in a while >>



are you just using plastic then?

 

[Verygreedy]

clams