I don't know how to stop it.  When I looked at the syslog it said to type cache_dirs -q, but when I type that it says command not found.  So how do you find and kill various processess that are running?

 

I stoped it and tried another precleared 2TB EARS and this time I had so many write errors, it disabled the drive.  I am attaching the syslog from that.

 

I then tried my third (and last) spare 2TB EARS drive and this time it started rebuilding at around 20MBps but it was staying consistant.  I had to leave for about an hour and a half and now it staying consistant at around 57-58 MBps and based upon how much it has done since I have been gone, probably at that speed for awhile.  So I think all is good now, but wondering what the problem is/was with the other drives.  They both had good smart reports at the end of the sucessful preclear.

syslog-2011-03-05.zip

I'm throwing in the towel for now.  The latest rebuild started slowing down again.  I put the old 1TB drive back and currently rebuilding parity at around 50 to 60MBps.  Since I will probably be getting a new MB (3rd time's a charm), I will get everything switched over, run some test and then start upgrading the drives.  We'll see what happens.

Does this seem right for a parity sync:

 

sync done. time=36802sec rate=53081K/sec

 

Also, my writes seem a little slow over GB net.  Yesterday I had a substained rate of 18MBps, but normally get 10 to 15 with an occasional 20MBps.  How does this seem?  I assume slow.  I'm not going to run through troubleshooting until I get the new motherboard running.  But any suggestions is appreciated.  Thanks.

Does this seem right for a parity sync:

 

sync done. time=36802sec rate=53081K/sec

 

Also, my writes seem a little slow over GB net.  Yesterday I had a substained rate of 18MBps, but normally get 10 to 15 with an occasional 20MBps.  How does this seem?  I assume slow.  I'm not going to run through troubleshooting until I get the new motherboard running.  But any suggestions is appreciated.  Thanks.

 

Rebuild at 53 MB/sec is pretty good.  Drive rebuild speeds are comparable to parity build speeds and considerably slower than parity check.

 

Your network write speed does seem slow.  Try running the tool described in THIS THREAD.

So to continue the saga ...

 

I switched MBs to a Biostar A760G M2+.  I still have the AOC-SASLP-MV8 installed but not currently using and I have had problems running prelcear on it.  I have sucessfully upgraded (2) of my 1TB HDDs to 2TB.  When I got to the third drive upgrade, it started rebuilding really slow (~1 to 2 MBps at the most) so I stoped it, rebooted and tried it again.  This time a little faster (~8 to 10 MBps) but then failed later on.  I put my 1TB drive back in for now and doing a parity rebuild/check.

 

What I find interesting is that this is the same drive I tried to upgrade early on in this post when I had the Asus MB.  So I'm thinking maybe a bad cable or hard drive chasis (supermicro 5 in 3).  I wanted to get your thoughts on what recommendations on what my next move should be.  I like to be able to troubleshoot this without putting my data at risk like I have been doing.  I know I can write and read ok to the disk directly, however, this might be where some of my slower speeds have been coming from.  Any thoughts?  Thanks.

 

Pull a SMART report for the drive.

Try running the preclear again on the disk.

 

Peter

Thanks for the reply, but in case it wasn't clear the way I stated it.  I have now tried upgrading this one paticular drive with (4) different 2TB drives (on 2 different mother boards) that were previously precleared with no errors.  For some reason, I am having a hard time upgrading this one paticular drive.  I don't think its my 2TB drives that are the problem.  Specially since I have used (2) of them to upgrade other drives in my array without any problems and relatively fast ~57MBps.

Stick the new replacement drive into a different slot utilizing both a different SATA port and power cable and see what happens.

 

Peter