Posts Tagged ‘file system’

Mounting an NFS Share on OS X: There was a Problem Connecting to the Server

You’ve tried to mount your linux NFS share via the Go menu’s Connect to Server dialogue but you keep getting an error message stating:

There was a problem connecting to the server

There was a problem connecting to the server


You know your URI is formatted correctly (nfs://server/share) and you can mount the share on other Linux hosts so what gives?

It turns out that in order to get OS X to play ball we have to add insecure to the export options of the shares you would like to mount. For example:

/home/karma/torrents 192.168.1.0/24(ro,no_root_squash,no_subtree_check,insecure)

Xen Virtual Disk I/O Errors

I just encountered this while making a tar backup on one of my virtual filesystems:

lost page write due to I/O error on xvdb1
end_request: I/O error, dev xvdb1, sector 33707688
Buffer I/O error on device xvdb1, logical block 4213461

Unfortunately, my fs suffered corruption.

Some folks, particularly Ubuntu users with kernel 3.2.x seem to say the answer is adding

barrier=0

to your ext3/ext4 mount options.

In my case I’m pretty sure an OOM error killed something critical to the backend on dom0.

Be sure to check your dom0′s dmesg.

UPDATE Uhh yeah, something actually managed to overflow the dom0′s fs. >.> This is what I was getting in the dom0 dmesg:

loop: Write error at byte offset 17820364800, length 4096.

for which there is very little discussion, but a quick df told me what was going on.

Force File System Check (fsck) on Reboot

You may wish to check the integrity of your root file system without using a live cd or different system. To force a file system check on reboot either:

# touch /forcefsck

or

# shutdown -rF now
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