Radified Guide to SCSI - Boot from a SCSI Hard Drive

Conclusion Major Premise The Argument Argument-part2 Minor Premise
Seek/Access Tekram/Adaptec This vs that Misc Misc config
Misc config 2 Config/Compare Comparison Linkage Radified Home

SCSI Linkage:

A Sample of Comments from SCSI users:

Everything will feel faster! You can't go back to IDE after that.
The JoJo

My five year old Cheetah Mark 1 is still more responsive than any IDE drive yet made, and will remain so until IDE access times improve. Of those who go SCSI, very few ever go back. You buy one SCSI rig and you can expect you'll buy others as the years go by - because once you get to know the power of fine SCSI drives, you'll never feel satisfied with IDE drives again. Most of the benefit in SCSI drives - if pushed to put a figure on it, I'd say 70 or 80% - is due to their superior seek times and lower latency.

I made the switch, and I don't believe I would go back to EIDE. Only if I needed mass storage at a cheap price, but this is not the case. When I moved from my WD Expert drive to my Atlas 10KII, what a difference. Just in converting MP3's to wav it was awesome. I even sit and watch defrag run sometimes because it screams right by. SCSI isn't for everyone, but for those do use it will notice the difference.

I just got my first SCSI rig, an IBM 36LZX (18.4GB) on a Tekram DC-390U3W card. It is MUCH more responsive than my old IDE system. I also appreciate SCSI's  fringe benefits. I can use one channel of my current card for SCSI CD-ROMs, etc., but I prefer to use ATAPI, since they tend to be a cheaper, and there isn't any performance difference for equivalent models. Using a SCSI boot drive, I have 2 free IDE channels. I can put a CD-ROM on one, a CD-RW on the other. This allows me to copy from one to the other. I could also add cheap, huge IDE storage IDE drives.

I will never again build a system with an IDE boot drive. The 10K RPM drives are reasonably cheap these days, running well under US$200, and once you get a card and drive, it will last you for a LONG time, from what I have heard...so the cost does have some mitigating factors.

All in all, I'm VERY happy with my SCSI rig...I think you will be too. If you're looking for "feel," then 10k RPM will give it to you. Only go 15k if you put your system under heavy stress, or if you have a large budget (I don't...sigh)

It is not just the low access times. The SCSI interface is far more intelligent than IDE, capable of queuing I/O requests and reordering them on the fly to optimize performance. Therefore, SCSI shines in multitasking environments. For example, if you have several processes running, accessing your drive at the same time and in different places, SCSI will run smooth in situations where IDE gets bogged down.

If you were to ask for a single word characterization, I would sum it up by saying that the low access times contribute to "responsiveness," while the multitasking capabilities create that great feeling of "smoothness."

Before closing, I want to mention <shamelessly pimp> a few other Radified guides that you might find helpful. For example:

The end.

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