11
votes
1answer
2k views

CentOS thinks Disk is busy, can't mount or fsck

I'm a longtime user, and first time question submitter. I've spent a full day searching this and many other sites for a solution, but I must resort to requesting assistance to resolve my situation. ...
0
votes
0answers
88 views

File corruption on Centos 6.4 KVM VM, ext3 ephemeral drive, not on xfs - why?

First off, let me say I am a software guy, not an admin, so please forgive me if I get terminology wrong. I'm writing software that runs on a Centos 6.4 VM on Openstack Grizzly, running KVM. It has a ...
-5
votes
2answers
341 views

How to convert lvm to ext3/4? [closed]

I have an old box(CentOS 5) that was formatted as lvm but now I want to convert it to ext3/4 file system without losing data. I have some empty disks that can be used, so is there an easy way to do ...
8
votes
2answers
5k views

Should we mount with data=writeback and barrier=0 on ext3?

We've been running a server on a VM at a hosting company, and have just signed up for a dedicated host (AMD Opteron 3250, 4 cores, 8GB RAM, 2 x 1TB in software RAID, ext3). While running performance ...
4
votes
2answers
1k views

How can I track down the cause of ext3 filesystem corruption?

We have a VMware vSphere 5 environment running CentOS 5.8 virtual machines. In the past two weeks we have had five incidents of virtual machines having a filesytem become corrupt, requiring an fsck to ...
2
votes
2answers
5k views

Does CentOS 5.x support ext4?

I believe the default OS file system in CentOS 5 is ext3. Is it possible to use ext4 on Centos 5.x, or only on 6.x? Can I upgrade an existing ext3 filesystem to ext4?
4
votes
3answers
3k views

CentOS disable filesystem check: superblock last mount time is in the future

I'm persistently getting the "Superblock last mount time is in the future" error when booting CentOS 6. I've seen other questions which ask how to resolve this error, but I know exactly why it's ...
0
votes
2answers
268 views

Convert Ext3 to Ext4 Filesystem failed because I cannot umount drive

I want to convert my Filesystem from Ext3 to Ext4 because of 32000 directory limit of Ext3. But when I want to umount the drive I get this error: umount: /: device is busy umount: /: device is busy ...
2
votes
2answers
178 views

How come /bin/rm -rf /backups/hourly.5/ takes forever on a backup server?

They're simply hardlinks so the files shouldn't actually even be deleted. What options do I have? It even seems to take quite some load. I don't see how deleting 30.000 hard-links should take more ...
0
votes
1answer
684 views

Joomla Editor not working after restoring mysql database

I've made a big mistake on one of my sites and I've deleted accidentally several files from our site's joomla directory. The database was Ok, so what I tried to do was to create a Joomla installation ...
0
votes
1answer
1k views

Problem fixing ext3 root file system using fsck on CentOS 5

When I run a read-only fsck on the mounted root partition of a CentOS 5 server, it finds a number of errors. However, running a forced check upon next boot does not find any! Here are the results of ...
3
votes
4answers
483 views

Speeding up creation of large ext3 filesystem on CentOS 5

We are creating a large backup ext3 partition on 16TB RAID array and the mke2fs took 2.5 hours to complete. Are there any known tricks we can use to shorten this time? The aim is to lower the time ...
1
vote
2answers
892 views

How do I improve my incremental-backup performance?

I'm currently using the traditional rsync+cp -al method to create incremental/snapshot backups of our server tree. The backups are going onto a pair of eight-disk towers connected to the backup ...
0
votes
3answers
581 views

ext3 optimization for 3D design /modelign (Maya 2011) in Centos 5.4 x64

Today i have been partitioning a 1TB hard disk where i want to install tomorrow Centos 5.4  x64 for use for 3D modelling,with Maya 2011. I created a 10 GB swap ( 8GB ran + 2) a 620 gb  partition for ...
0
votes
1answer
440 views

USB drive only for Linux backups: To partition or not to partition?

I have a 2TB USB drive plugged into CentOS 5.5 that will be formatted with ext3 and will only be used for file-level backups. I've always partitioned my drives but a while ago when I had setup Amazon ...
12
votes
8answers
48k views

How do you re-mount an ext3 fs readwrite after it gets mounted readonly from a disk error?

Its a relatively common problem when something goes wrong in a SAN for ext3 to detect the disk write errors and remount the filesystem read-only. Thats all well and good, only when the SAN is fixed ...
2
votes
2answers
1k views

Change EXT3 stride and stripe-width settings post-install on CentOS 5.3

Is there a way to change the stride and stripe-width options on an ext3 file system under CentOS/RHEL 5.3? There's no way to specify it via anaconda during installation that I saw, and while I see ...
3
votes
2answers
141 views

/var a file and not a folder

On a CentOS 5.3 server the /var folder has changed to a file. Appears to be FS corruption. Rest of the FS looks OK. Anyone know a quick way to fix this? fsck.ext3 reports the fs as clean even using a ...