SATA performance on FC2
Marshall Lewis
marshall at novafoundry.com
Fri May 7 01:46:08 UTC 2004
The drive letters changed when moving from the 2.4 kernel to the 2.6
kernel.. it wasn't directly related to FC1 & FC2.
I have an opteron 248 at home (and a 246 at work) both running segate
120 gig sata drives on a msi k8t master2-far motherboard (via
chipset..using the sata_via module). I'm not seeing the same problem
you are on either machine.. I do notice (after looking at your bug
report) that dma is enabled, but that I don't have a "current active
mode" set...
[root at grendel root]# hdparm /dev/hde
/dev/hde:
multcount = 16 (on)
IO_support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 16383/255/63, sectors = 234441648, start = 0
[root at grendel root]# hdparm -i /dev/hde
/dev/hde:
Model=ST3120026AS, FwRev=3.05, SerialNo=3JT2DTXX
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=unknown, BuffSize=8192kB, MaxMultSect=16, MultSect=16
CurCHS=65535/1/63, CurSects=4128705, LBA=yes, LBAsects=234441648
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2
AdvancedPM=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-6 T13 1410D revision 2:
* signifies the current active mode
[root at grendel root]# hdparm -Tt /dev/hde
/dev/hde:
Timing buffer-cache reads: 4168 MB in 2.00 seconds = 2084.32 MB/sec
Timing buffered disk reads: 168 MB in 3.03 seconds = 55.51 MB/sec
I'm also having to boot with acpi=off in order for my sata controller to
work.. when I try to boot without that set, I get lots of errors about
interrupts going away and such... and the system will run, but I'll get
crappy performance (and lots of error messages). I kind of doubt that
it's related to the problem you're having, but you might try adding that
option next time you reboot. And I have no idea if the fact that I
don't have a "current active mode" is significant or not.
--
Marshall
On Thu, 2004-05-06 at 19:10, Gene C. wrote:
> I am seeing extremely poor performance for a SATA drive on an x86_64 system
> ... https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=122687
>
> I have two Maxtor 120GB drives on a ASUS SK8V mobo with an Opteron 140. Under
> FC1 the SATA drive performance matches that of the PATA drive. However,
> under FC2 performance is terrible (more than order of magnitude difference).
>
> OK, anyone else see this?
>
> On FC2, how do I get the "old" SATA support (like on FC1) specified?
> --
> Gene
>
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