On 17-Jan-05, at 1:14 PM, Paul Clements wrote:

Hi,

Markus Gehring wrote:

quoted

I have a reproducable problem with corrupted data read from a 
RAID1-array.
Setup:
 HW:
  2 S-ATA-Disks (160GB each) -> /dev/md4 RAID1
  Promise S150 TX4 - Controller
  AMD Sempron 2200+
 SW:
  Fedora Core 3
  Kernel 2.6.10 unpatched
  Samba (for read/write-accesses)
  SW-Raid
Everything works fine with only one drive in the array. If the second 
is
synced up read accesses return corrupted data.
Interesting: If you remove again the second disk. The same files will 
be
 read correctly again (no matter if written while only one disk is in
the array or two are synced!)!

This makes it sound like bad data is getting written to the second 
disk during resync. Could you give more details about your test 
procedure (a script or list of steps that reproduces the problem would 
be great)?

I don't think samba is the culprit, but just to be sure, is there any 
chance you could reproduce the problem without samba in the equation? 
(From what you say above, I assume all reads and writes are coming 
from a samba client of some sort?)

I've run into this before. I don't think Samba was the issue, as it was 
puking on unrelated files, usually showing up as exec format errors 
when trying to run various commands.

The controller in question was a Promise Ultra66 or Ultra100 (I can't 
remember which), plugged into a Powermac 9600. I wonder if the Promise 
driver is interacting poorly with MD?


Cheers - Tony 'Nicoya' Mantler :)

--
Tony 'Nicoya' Mantler -- Master of Code-fu -- nicoya@ubb.ca
--  http://nicoya.feline.pp.se/  --  http://www.ubb.ca/  --