More fuel for the ATA fire from linux-kernel:
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From: "Steven N. Hirsch" <[EMAIL PROTECTED]>
Date: Sun, 11 Jun 2000 00:24:16 -0400 (EDT)
Subject: Nice work!
I'd like to publicly express my appreciation for Andre Hedrick's work on
the UDMA IDE driver (and additional thanks to Bartlomiej for the
unofficial backport to 2.2.16).
After using nothing but SCSI disks for many years (due to
miserable early experience with ATA), I picked up a Maxtor 7200rpm UDMA-66
drive and Promise Ultra66 controller to play with. All I can say is:
"Wow!". Without any special tweaking, I'm seeing:
$ Bonnie -s 512
File './Bonnie.1422', size: 536870912
Writing with putc()...done
Rewriting...done
Writing intelligently...done
Reading with getc()...done
Reading intelligently...done
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
512 7472 98.4 31443 29.4 12188 26.7 7986 96.4 28741 19.4 138.7 1.1
$ iozone 512 8192
IOZONE: Performance Test of Sequential File I/O -- V2.01 (10/21/94)
By Bill Norcott
Operating System: POSIX 1003.1-1990 -- using fsync()
Send comments to: [EMAIL PROTECTED]
IOZONE writes a 512 Megabyte sequential file consisting of
65536 records which are each 8192 bytes in length.
It then reads the file. It prints the bytes-per-second
rate at which the computer can read and write files.
Writing the 512 Megabyte file, 'iozone.tmp'...19.350000 seconds
Reading the file...18.240000 seconds
IOZONE performance measurements:
27745266 bytes/second for writing the file
29433712 bytes/second for reading the file
The machine is a dual P3 500 SMP w/ 256MB of memory and built-in Adaptec
7890 U2W controller.
To say that this is smoking is an understatement. Twice the throughput of
my IBM 10k rpm U2W drive!
Very impressive.
Steve
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