On Friday April 9 at 06:42pm Warren Dodge <[EMAIL PROTECTED]> wrote:
On Apr 9, 2004, at 10:00 AM, Roberto Sanchez wrote:
My only complaint is that my hdparm performance seems to suck quite badly: # hdparm -tT /dev/hda /dev/hda: Timing buffer-cache reads: 128 MB in 1.85 seconds = 69.19 MB/sec Timing buffered disk reads: 64 MB in 1.53 seconds = 41.83 M1B/sec
Hmm.. suspicious results: probably not enough free memory for a proper test.
Mine has 768mb of ddr2100 (1x256, 1x512)
40 MB / sec. is about right for current IDE drives.
Perhaps for buffered disk reads, but certainly not for buffer-cache reads:
mental-graffiti:/home/jkoenig# hdparm -Tt /dev/hda
/dev/hda: Timing buffer-cache reads: 588 MB in 2.00 seconds = 294.00 MB/sec Timing buffered disk reads: 136 MB in 3.02 seconds = 45.03 MB/sec
Disk is a Maxtor 8mb 160gb 7200rpm, on a VIA chipset: mental-graffiti:/proc/ide# lspci ...<snip>... 0000:00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C/VT8235 PIPC Bus Master IDE (rev 06) ...</snip>...
Not sure if its UDMA 100 or 133
Your is probably UDMA 133. Mine is a Maxtor Diamond Max 120 GB, and it is UDMA 133. My other box, with a Western Digital UDMA 100 drive, gets like 800-900 MB/s in buffer-cache reads.
I am really stumped on this.
-Roberto Sanchez
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