Hi,

>>>>> On Tue,  4 Dec 2001 14:00:15 +0100, ausias vives prat <ausias@jazzfree.com> said:

ausias> Bonnie results
ausias> ______________________________________________________________________________
ausias> IDE Samsung WNR-31601A 1.6 GB 
ausias>               -------Sequential Output-------- ---Sequential Input-- --Random--
ausias>               -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
ausias> Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU  /sec %CPU
ausias>           100   466 93.7   839 49.0   504 54.2   421 94.9  1060 87.7  22.5 23.4
ausias> SCSI Fireball 540 MB            
ausias>               -------Sequential Output-------- ---Sequential Input-- --Random--
ausias>               -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
ausias> Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU  /sec %CPU
ausias>           100   515 98.4  1162 80.5   481 53.7   475 99.4  1354 83.8  26.9 20.1

ausias> ByteBenchmark results
ausias> ______________________________________________________________________________
ausias> IDE Samsung WNR-31601A 1.6 GB
ausias> File Read  (10 seconds)                    6280.0 KBps  (10 secs, 6 samples)
ausias> File Write (10 seconds)                     693.0 KBps  (10 secs, 6 samples)
ausias> File Copy  (10 seconds)                     454.0 KBps  (10 secs, 6 samples)
ausias> File Read  (30 seconds)                    6526.0 KBps  (30 secs, 6 samples)
ausias> File Write (30 seconds)                     666.0 KBps  (30 secs, 6 samples)
ausias> File Copy  (30 seconds)                     477.0 KBps  (30 secs, 6 samples)
ausias> SCSI Fireball 540 MB
ausias> File Read  (10 seconds)                   11666.0 KBps  (10 secs, 6 samples)
ausias> File Write (10 seconds)                    1000.0 KBps  (10 secs, 6 samples)
ausias> File Copy  (10 seconds)                     626.0 KBps  (10 secs, 6 samples)
ausias> File Read  (30 seconds)                   12115.0 KBps  (30 secs, 6 samples)
ausias> File Write (30 seconds)                    1000.0 KBps  (30 secs, 6 samples)
ausias> File Copy  (30 seconds)                     713.0 KBps  (30 secs, 6 samples)

ausias> The results should be normal, but I think my IDE drive is better than the scsi,
ausias> in MacOS side the IDE drive has a better performance than the scsi, at least
ausias> norton utilities shows that.

I don't know why is IDE drive more slow than SCSI, but I think
hardware read/write cache don't work in M/I wdc/wd driver in IDE.

When I executed "atactl /dev/rwd0c identify" in LC630 , write cache is
not enabled. But in PowerBook 2400, write cache is enabled.

In recent M/I wdc/wd driver, which read/write cache is enabled or not,
decided by hardware.

I think benchmark result is nonsence, because sequential read/write
access is not main operating in usual, randam access is main.
If it is, there is almost no defference both IDE performance and SCSI one.

Takeshi Shibagaki
ie9t-sbgk@asahi-net.or.jp