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Date: Sun, 15 Jun 1997 12:22:21 -0500 From: Robert Johannes <rjohanne@piper.hamline.edu> To: linux-scsi@vger.rutgers.edu Hello, those of you who gave me advice and have been following my shopping spree on building a system from components might be interested in knowing the final tentative results. I've ended up buying a supermicro atx motherboard with the TX chipset, 64 megs of 12ns sdram which was only selling at about $20 more than EDO 60ns(hopefully linux won't make a fuss about that); the processor is the regular pentium 200/mmx, and I already had an ibm and adaptec 2940u scsi devices; I know alot of you advised on buslogic, but during a mail order spree, I got caught up in a tight situation with one company that I had ordered the buslogic BT-948, and ended up buying the adaptec 2940u for about 35 dollars less than the BT-948 (which is unusual because the 2940's usually sell for much more than the BT-948s) I don't think the aicxxx support is too terrible, and I'm willing to live with that until the support for it becomes standard. The ultra-scsi IBM drive, I don't quite know what to think of it. It is an ultrastar 2ES, and I'm looking for information about its performance. If anyone has information, please let me know. The specs of this drive say that it is supposed to transfer at a minimum sustained rate of 5.1 megs/s, and up to 8 megs/s in certain positions of the drive. I've repeatedly tried copying a 47meg wave file, and each time the drive has taken 34 seconds to finish copying it. This translates to about 1.4 or 1.5 megs/s, and ofcourse since I'm copying the file to another partition of the same drive, there's twice as much activity on the scsi-bus, but even then if the minimum sustained rate is at least 5.1, twice as much activity on the bus should reduce this rate to about 2.5 megs/s; but I'm only getting half that. Ofcourse I don't know if copying a 47 meg file is a good way to time the read/write speed of a drive; I would welcome suggestions on how to do that. The final problem, that I didn't anticipate when I was shopping for components is the support of the TX chipset. After I put together the system, (which by the way turned out to be much easier than I anticipated; I always thought the hardware installation was easier than the software installation; it was a snap to put that together, but the software installation is going to be a bitch.) I tried installing linux (redhat 4.1) and it hung over "keyboard timed out" "keyboard timout error", and I had to reset the system to start the procedure again. It also said something like, "unable to read the partition table" and "unrecognized pci device"; I'm imagining that this refers to the TX chipset which I imagine isn't yet supported by linux? I would appreciate somehelp if anybody would have knowledge of how to bypass this. And of course I thank you guys for your patience for replying comments and suggestions, despite the fact that my questions and problems had very little to do with scsi. My respect and high regard for the linux community is very much due to the fact that it is supportive, no matter how silly a question may seem like. Thanks much pals. Robert
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