[diagnostic] cache_lock: blocked on... extremely urgent

[Petr Janda]

Matthew Dillon wrote:
    It sounds like a bug in the driver for the raid controller, or the
    firmware for the raid controller.
  
Well do you think I should get a different SCSI/RAID controller in that 
case? Or is there anyway I can help you find a bug in the RAID 
controller code. Those cache_lock messages and ssh shell freezing upon 
entering a directory are the only information i have for you at the 
moment. The biggest problem is that for some reason these problems make 
many emails stuck in either active or incoming queue. The only way to 
deliver them is to stop/start postfix and then observe some of them get 
delivered, then repeat this a few times for the rest to get delivered.

Now, should this be a drive problem, is there some software that will 
find out if theres something wrong with the discs?

Thanks a lot for your time,
Petr