Hello all, I have Liunx 2.4.17 with a Promise FastTrak TX2, and 2 WD 40GB ATA100 disks in a RAID0 stripe set. It works wonderfully - "modprobe pdcraid" and Linux sees them no problem. I used Linux FDISK to make the partitions, and can see all partitions from both Linux and Win2000 (dual boot, from separate disk). /dev/hde never gets programmed for DMA, multicount, and both disks were in mode "68" which is not ATA-100 speed. I get some "drive not ready errors" in /var/log/messages, but my data is fine (weird!). Manually setting the speed settings with hdparm like so: hdparm -m16 -d1 -X69 /dev/hde, and hdparm -X69 /dev/hdg makes them identical from a /proc/ide/hd[e,g]/settings perspective. Simply turning on DMA for /dev/hde makes the error messages go away. Three questions: Any ideas why this does not automatically get set at boot? Also, any idea why each drive shows a radically different CHS geometry? What does "CANNOT DECODE HOST" mean in the /proc/ide/pdc202xx file? Ed PS For the curious, tiobench data: [Ed@tempinstall tiotest-0.26]$ ./tiobench.pl --size 1024 --dir /mnt/raid/test Size is MB, BlkSz is Bytes, Read and Write are MB/sec, Seeks are Seeks/sec Dir Size BlkSz Thr# Read (CPU%) Write (CPU%) Seeks (CPU%) ----- ------ ------- ---- ------------- -------------- -------------- /mnt/ 1024 4096 1 44.2241 26.0% 39.2536 34.3% 152.126 1.29% /mnt/ 1024 4096 2 29.9385 18.6% 38.0826 33.3% 178.977 1.23% /mnt/ 1024 4096 4 29.5640 19.2% 38.6084 33.9% 198.879 1.29% /mnt/ 1024 4096 8 27.6160 17.9% 38.4465 34.0% 213.668 1.33%
