Hi All I am a bit baffled by this but for a long time now (should have paid more attention!) EVERY time I do a parity check I get a huge amount of sync errors in excess if 1.5million errors.

If I correct the errors then check without correction errors are listed straight away!

 

All drives are showing as having 0 errors and I have checked the smart status of all drives with no issues found.

 

This is a concern and I want to know what is going on and how to fix it please.

 

Running 5.0RC16.

 

Any pointers, info, explanations would be appreciated.

 

TIA

 

See this thread

Ok so here is my syslog

 

It should be noted that the first Check was the monthly sceduled one while the second was manually triggered by me then cancalled when I realised it was correcting not checking (oops) and the third was a checking but cancelled when it showed that lots of sync errors were appearing straight away.

 

I really just wanted to know if this is expected behavior or not?

I thought that as the parity is updated as data is added to the array sync error should be minimal?

 

Thanks for any insight offered

 

syslog.txt.zip

There should be zero errors.

 

Follow this procedure: http://lime-technology.com/forum/index.php?topic=28484.msg253513#msg253513

 

Post SMART reports for all disks.

 

There are additional syslog files on the system. Look in /var/log/ for additional syslog files. Enter "ls /var/log" to list the files and then copy the files to the flash drive, e.g., "cp /var/log/syslog.1 /boot/syslog.1.txt". Repeat the cp command for each file in the /var/log directory. Attach the files to a post. Zip the files if they are too big to post.

I was going to reply with some of what dgaschk said but he beat me to it.

 

Also, what is your Power Supply? Maybe it can't reliably run all of your drives at the same time such as during parity check.

 

Thanks for the help

 

My System is as is follows

Unraid 5.0 RC16c Plus

Antec nine hundred two V3

Coolermaster 550W Single rail

2x Notco SS-500

MB : Asus P5QL Pro

CPU : C2D @2.66 Ghz

8192 Mb DDR2 Ram @800 Mhz (4x 2Gb dimms)

Drives

2x WD 3.0 Tb Red NAS (1x Parity, 1x Data)

2x WD 2.0 Tb Green with wdidle fix

2x WD 500 Gb Green with wdidle fix

1x WD 320 GB Green with wdidle fix (cache)

 

1x Samsung 1.0 Tb (not in array)

 

All drives passed smart tests but Drive 4 showed powerup issues

could this be the source of the problems?

I am copying all data from Disk 4 to external storage then I will remove it from the array and see if that fixes it

but in the mean time could I please have any feedback/notes on the syslog and smart tests please.

 

Your help is appreciated

 

 

Checked the bios for voltage levels - all within spec 

 

Attached Logs for all smart reports and

log.zip

Run checkdisk on the Flash drive in a PC or Mac.

Backed up Unraid and moved it to newly formatted via Win7 full format 32K clusters sd card .

I am Using the Kingston G2 SD reader so this is much simpler.

No change lots of Error still showing on check.

 

Moving remaining data from disk 4 to external storage then will completely empty the share attached to that particular disk and check again.

Also replacing  Disk3 as it noted as having power up issues with the 1TB Samsung .  As there was nothing on Disk 3 anyway luckinly. this is a no brainer and will happen after the data from disk 4 has been removed.

 

Anything else I should be doing?