[lkml]   [2001]   [Nov]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subjectslowdown on Via ide chipsets with 2.4.15?
something i just took notice while fixing my computers.  
hdparm -t to test the speed of drives, i have in the past had about 30MB/s
across all my drives.
Now, my primary disk, which is the only one on it's channel, gets 19MB/s
(udma2 speeds). It's an udma4 drive and i've seen it get 30+ on average in
earlier kernels. My primary master on the promise card gets 30+ still, but
my slave on the same channel gets 19MB/s even though the master is not being
used. I know there is to be expected some performance drop, but that much is
a little disconcerting. I have my atapi devices on the secondary channel of
my via controller (motherboard) and the second channel on the promise card
will be used for my new drive.
The harddrives are configured exactly the way they used to be and the kernel
is compiled with the exact same options for ide/dma and such. The
changefile doesn't look like the via ide drivers were messed with. The only
other difference is that all my drives are now ext3.

Controller (motherboard) VP_IDE: VIA vt82c686a (rev 22) IDE UDMA66
controller on pci00:07.1
Controller (card) PDC20262: (U)DMA Burst Bit ENABLED Primary PCI Mode
Secondary PCI Mode.

All drives are set to UDMA4 (ATA66) hdparm isn't used, simple check shows
that everything is set the way it should be default.

Also, the kernel displays UDMA(66) wouldn't it be ATA66. UDMA comes in
1,2,4, and 5. that's like, ata16, ata33, ata66 and ata100.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:13    [W:0.047 / U:0.280 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site