John Summerfield wrote:
Sven Luther wrote:
fwiw I noticed something very like this between 2.2 and 2.4 when 2.4 was new: 2.2 was faster on my Pentium system. I think it was a earlier version of the same chipset.
Here are results on 2.6.7-1-k7: /dev/hda: Timing buffered disk reads: 108 MB in 3.02 seconds = 35.78 MB/sec
/dev/hdg: Timing buffered disk reads: 120 MB in 3.01 seconds = 39.93 MB/sec kowari:/etc#
Both drives are WD120 Gb (different models), hdg is on an Abit hotrod66 (promise chips).
And how much you would get in 2.4 ?
Sorry.
kowari:~# hdparm -t /dev/hd{a,g}{,}
/dev/hda: Timing buffered disk reads: 152 MB in 3.02 seconds = 50.33 MB/sec /dev/hda: Timing buffered disk reads: 152 MB in 3.02 seconds = 50.33 MB/sec
/dev/hdg: Timing buffered disk reads: 120 MB in 3.02 seconds = 39.74 MB/sec
/dev/hdg: Timing buffered disk reads: 120 MB in 3.00 seconds = 40.00 MB/sec
kowari:~# uname -r
2.4.26-1-k7
kowari:~#
I have further results, and I've just filed a bug report (confirmation not in yet so no no).
kowari:~# hdparm -t /dev/hd{a,g}{,}
/dev/hda: Timing buffered disk reads: 112 MB in 3.05 seconds = 36.73 MB/sec
/dev/hda: Timing buffered disk reads: 110 MB in 3.00 seconds = 36.64 MB/sec
/dev/hdg: Timing buffered disk reads: 118 MB in 3.01 seconds = 39.21 MB/sec
/dev/hdg: Timing buffered disk reads: 120 MB in 3.01 seconds = 39.83 MB/sec kowari:~# uname -r 2.6.8-1-k7 kowari:~#
It's a self-built kernel, but without modification.
I neglected to include a modules listing in the bug report. Here are those myst likely to be involved:
ide_generic 1472 0
sis5513 16776 1
hpt366 22788 2
ide_disk 19264 5 hpt366
ide_core 138776 5 usb_storage,ide_generic,sis5513,hpt366,ide_disk
sd_mod 21632 0
ata_piix 8132 0
libata 41348 1 ata_piix
scsi_mod 124620 3 usb_storage,sd_mod,libata
unix 28592 170
--
Cheers John
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