Hi,
I just installed a simple raid-1. I have a single HD on each controller. ie. 2 controllers 2 HDs. That's it, no CD players or DVD drives...
I did a fresh install of Sarge. After reboot I unplugged the CD drive, and let the array sync overnight. It took 10hrs to sync 160GiB, which seemed pretty long, so I executed the "dd if=/dev/hda of=/dev/null bs=64k count=10000" command I've seen posted on this list.
It took about a minute and change to complete, which is long. So out of curiosity I plugged in a CD player and booted Knoppix. When I ran the same command it took only 30 seconds (which is still not as quick as some of the numbers on this list, but it's an old celeron 466MHz).
I'm very unfamiliar with options for speeding up hard drive access. What might Knoppix be setting (and how would I look for it), that it's getting 100% better drive performance than a plain jane Sarge install?
Thanks Jay
******** Knoppix Run ***********
root@ttyp0[~]# for i in 1 2 3; do > time dd if=/dev/hda of=/dev/null bs=64k count=10000 > done 10000+0 records in 10000+0 records out 655360000 bytes transferred in 46.301872 seconds (14154071 bytes/sec)
real 0m46.754s user 0m0.480s sys 0m29.710s
10000+0 records in 10000+0 records out 655360000 bytes transferred in 49.852186 seconds (13146063 bytes/sec)
real 0m51.075s user 0m0.430s sys 0m26.610s
10000+0 records in 10000+0 records out 655360000 bytes transferred in 46.237684 seconds (14173720 bytes/sec)
real 0m47.928s user 0m0.480s sys 0m31.770s
************** Sarge Run *************
sandy:~# for i in 1 2 3; do > time dd if=/dev/hda of=/dev/null bs=64k count=10000 > done 10000+0 records in 10000+0 records out 655360000 bytes transferred in 66.004525 seconds (9929016 bytes/sec)
real 1m6.052s user 0m0.637s sys 1m2.888s
10000+0 records in 10000+0 records out 655360000 bytes transferred in 63.797226 seconds (10272547 bytes/sec)
real 1m3.886s user 0m0.678s sys 1m0.732s
10000+0 records in 10000+0 records out 655360000 bytes transferred in 64.729628 seconds (10124575 bytes/sec)
real 1m4.822s user 0m0.616s sys 1m1.668s
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