Red Hat Bugzilla – Bug 245163
Promise FastTrak (pdc202xx_old) on Fedora7
Last modified: 2008-06-16 21:40:26 EDT
Description of problem:
Kernel does not handle Promise FastTrak controller in a right way.
As I found out googling internet probably pdc202xx_old module does not see that
80pin cable is connected to disk and it automatically downgrade speed to UDMA2.
Additionally there is lots of ata error which downgrades speed to PIO4. I attach
my dmesg (kernel booted witch 'irqpoll' parameter)
Same configuration worked (works) without any problem on FC6 and Ubuntu 7.04
Version-Release number of selected component (if applicable):
2.6.21-1.3228.fc7 and all before
Really poor disk performance.
Timing cached reads: 236 MB in 2.01 seconds = 117.30 MB/sec
Timing buffered disk reads: 2 MB in 4.82 seconds = 424.47 kB/sec
Same test on Ubuntu
Timing cached reads: 254 MB in 2.01 seconds = 126.38 MB/sec
Timing buffered disk reads: 164 MB in 3.03 seconds = 54.19 MB/sec
Created attachment 157532 [details]
Same behavior here with every FC7 kernel, including 22.214.171.124-33.fc7, which I
think it is supposed to have the cable detection logic fixed.
Just like the previous comment, disk drives are Seagate ones: ST380021A, 3.19
and ST3120022A, 3.06
These disks were working right with previous versions of Fedora.
I'm reviewing this bug as part of the kernel bug triage project, an attempt to
isolate current bugs in the fedora kernel.
I am CC'ing myself to this bug and will try and assist you in resolving it if I can.
There hasn't been much activity on this bug for a while. Could you tell me if
you are still having problems with the latest kernel?
If the problem no longer exists then please close this bug or I'll do so in a
few days if there is no additional information lodged.
I've been told that pata_pdc202xx_old /which is used for FastTrak's since the
libata switch/ is not really reliable right now and I should switch to the old
ide code. AFAICS there is no way to use the old IDE code in Fedora barring
building a custom kernel.
Hopefully when fixed Fedora can integrate it from the latest kernel.
(In reply to comment #5)
> Same as:
> Hopefully when fixed Fedora can integrate it from the latest kernel.
Since Alan is handling this upstream he can confirm or deny this and I've
re-assigned it to him as such.
I've been testing a PDC20263 card today to try and pin this down further. Got a
couple of patches pending for -mm but want to test them a little bit first
20267 card arrived today (ebay has its uses for junk PC hardware). I'll be doing
some testing on this board now
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