First backup run failed: I/O error

Backup agent for Linux servers and workstations on-premises or in the public cloud

Re: First backup run failed: I/O error

Veeam Logoby tdouble » Thu Aug 04, 2016 9:24 pm

The CentOS 6.5 server is 500GB and the Windows server is 700GB. I was able to create another CentOS 6.5 server, set it up as the NFS server, and was able to run a full backup job from the original CentOS box to the new one using the Veeam Linux agent. Looks like there is an issue with the Windows driver.
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Re: First backup run failed: I/O error

Veeam Logoby tdouble » Thu Aug 04, 2016 10:57 pm

I spoke too soon. I thought it was going to complete, but it did fail at 99% with an I/O error.
2016-08-04 07:51:27 Backed up /dev/sda 500.5MB at 36.2MB/s 00:00:14 │
2016-08-04 07:51:41 [error] Backing up vg_toddcentos 456.0...03:39:51 │
2016-08-04 11:31:42 [error] Input/output error ▒
2016-08-04 11:31:42 [error] Failed to perform backup

This was with a CentOS 6.5 500GB physical server to another CentOS 6.5 physical server 500GB on the same network.
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Re: First backup run failed: I/O error

Veeam Logoby vmniels » Fri Aug 05, 2016 8:26 am

Well it does seems that Windows isn't the best target. Did you by any chance did a retry to see if it would finish to 100%? Could you provide us the logs as well (dmesg -T, /var/log/veeam and syslog if possible).
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Re: First backup run failed: I/O error

Veeam Logoby tdouble » Fri Aug 05, 2016 6:42 pm

The retry failed at 99% again.
When I try dmesg -T, /var/log/veeam, I get invalid option -T
With out the -T I cannot get the full logs which seems to way too much. I am no Linux guru, can you tell me the best way to get these logs for you?
Thanks!
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Re: First backup run failed: I/O error

Veeam Logoby PTide » Tue Aug 09, 2016 6:10 pm

Then please run the following commands:

dmesg > dmesg.log
tar -zcvf veeam_log.tar.gz /var/log/veeam.
tar -zcvf messages.tar.gz /var/log/messages
lsblk -af > lsblk.log

After you've executed the commands you can find dmesg.log, veeam_log.tar.gz, messages.tar.gz, lsblk.log files in your current directory, please send them to us via PM or share them.

Thanks
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Re: First backup run failed: I/O error

Veeam Logoby tdouble » Thu Aug 18, 2016 10:30 pm

I have gotten the logs and put them in dropbox for you and have sent you the link in PM. Please let me know if there is anything else you need from me. Thanks!!
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Re: First backup run failed: I/O error

Veeam Logoby tdouble » Wed Sep 07, 2016 6:37 pm 1 person likes this post

I just wanted to give an update on this. I have gotten Linux Beta V2 and had no issues going CentOS to CentOS. It was also very fast. It looks like there were major improvements in V2. I will try the CentOS to Windows server when I have time and will update this post. Thanks!
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Re: First backup run failed: I/O error

Veeam Logoby vmniels » Thu Sep 08, 2016 7:53 am

This might be related to the default NFS service not being the best on Windows 2012 and before. There are alternatives such as FreeNFS however they hardly being updated.

A potention option would be to test this with Windows 2016 RTM edtion to see for improvements. In general NFS just works better on Linux ;-)
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