Hi there, I've just put a couple new Seagate Barracudas ST150176LW (50 G each, Ultra2 SCSI) into a PC equipped with an AMD K6-2 350, 64 MB RAM and a Tekram DC-390U2W controller, running kernel 2.2.7 and ext2. I am using the latest driver for the controller from Tekram's website (the driver files have a date from February). Copying an 140 MB file from one disk to the other takes about 20 seconds, roughly twice as fast as copying the same file between the 2 IDE drives (on separate controllers) that are also in the PC. That seems awfully slow. Am I missing something here? Has this anything to do with enabling DMA (the kernel says during bootup that it's disabled in the BIOS, although it's set to Auto - how do you enable it?)? I was thinking this was only relevant for IDE drives anyway (what the heck _is_ DMA?). The CPU load during copy goes up to 70%. Is this machine simply underpowered to get a faster transfer? I am new to SCSI so this might be some obvious, stupid configuration error. Any suggestions appreciated. Cheers Frank (Sorry if this has nothing to do with RAID per se, but since I am lurking in this list, I've seen that you discuss a lot of product specific performance stuff also.) -- frank joerdens joerdens new media urbanstr. 116 10967 berlin germany e: [EMAIL PROTECTED] t: +49 (0)30 69597650 f: +49 (0)30 7864046 h: http://www.joerdens.de pgp public key: http://www.joerdens.de/pgp/frank_joerdens.asc - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED]
