I'm curious, has anyone gotten Ultra ATA/100 up and running on Linux (or win2k even)?
I'd like to know real transfer speeds.
At work I have a server with an Adaptec 2100S RAID controller and 3 10k rpm seagate
drives, in a RAID 5 config. Everything is Ultra 160, yet it reads at about 16-18mb
/sec. :(
On my fastest server, I have an Adaptec 3200S RAID controller, 6 15k rpm seagate
drives in a RAID 1/0 configuration, also ultra 160. This is running win2k, and
benches at 30(avg)-40mb (best) /sec reads.
I think this stinks. My laptop running Ultra66 can read at 16.5mb/sec. I guess the
30-40 isn't too bad, but I'm displeased at the 16-18mb on the 2100s. I called adaptec
and complained, but the person I spoke with said, "well what is Ultra160 supposed to
transfer at, I don't know....". I flashed the controller bios, but I think that
slowed it down to about 12-14 (from first tests). :<
What kind of rates do you guys get with various hardware? Controllers, Raid, IDE,
mdma/udma 33/66/100...
Test your read speed under linux:
ide only: (tests cache and disk reads, independently)
hdparm -tT /dev/hda
any drive:
time dd if=/dev/sda of=/dev/null bs=1024 count=102400
(returns minutes and seconds)
bc
100/(minutes*60+seconds)
The windows program I used is called clibench. I think I found it on download.com. I
trust it's accuracy because I booted linux on the same server running the 2100s, and
did the above 'time dd' test. The linux and NT 4/clibench test results were the same.
clibench also does some processor and memory throughput tests, and is very small and
lite. You can also save results, and compare them with othere files. I have about 10
benchmarks of different computers that I can use to compare.
Cory
