ext3 is the default file system for many Linux distributions.

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9
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2answers
1k views

Is post-sudden-power-loss filesystem corruption on an SSD drive's ext3 partition “expected behavior”?

My company makes an embedded Debian Linux device that boots from an ext3 partition on an internal SSD drive. Because the device is an embedded "black box", it is usually shut down the rude way, by ...
3
votes
3answers
140 views

one 16K random read I/O issues 2 scsi I/O (16K and 4K) requests in linux

I noticed weird issue when benchmarking random read I/O for files in linux (2.6.18). The Benchmarking program is my own program and it simply keeps reading 16KB of a file from a random offset. I ...
0
votes
1answer
113 views

Why would an ext3 filsystem be rolled back on a Debian VM running in VirtualBox after loss of power to the host

A Debian Virtual machine runs as a Guest VirtualBox VM. It's filesystem is EXT3. The host system loses power and after booting up the host system and guest VM, I find that the VM's filesystem has been ...
-1
votes
3answers
90 views

Will the data be deleted when resizing a partition [closed]

I'm planning to resize one of the server partition from 40GB to 1900GB. The current partition has files on it while the space to be added is unallocated. Will my existing files be deleted? Any help ...
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 ...
6
votes
3answers
412 views

DRBD configuration

I was going through the configuration of DRBD on two nodes. The DRBD has already configured, but I would like to enable the dual primary mode feature. On drbd site I have seen that it requires the ...
-2
votes
1answer
5k views

RHEL - blocked FC remote port time out: saving binding

My Server went into a faulty state since the database could not write on the partition. I found out that the partition went into Read Only mode. Finally to fix it, I had to do a hard reboot. Linux ...
1
vote
3answers
247 views

Compact Flash mounted Read Only

I have a board, running linux (RedHat, kernel: 2.4.32). The board has been up and running since long time. However suddenly, some errors are being observed in the logs, and the Compact Flash (present ...
3
votes
3answers
725 views

Unable to list contents/remove directory (linux ext3)

System is CentOS5 x86_64, completely up to date. I've got a folder that can't be listed (ls just hangs, eating memory until it is killed). The directory size is nearly 500k: root@server ...
0
votes
1answer
834 views

Solaris support for ext4/ext3/btrfs

Does anyone know if Solaris 11 (Sparc version) supports mounting ext3/ext4 or even better Btrfs volumes ? Most of the topics I find on the web are quite outdated (2006/2007) and reference old ...
3
votes
1answer
990 views

Mounted filesystem / changed to read-only

This is how / should be mounted mount /dev/md0 on / type ext3 (rw,errors=remount-ro) but in fact, it is mounted read-only because of unknown reason so far for me. cat /proc/mounts /dev/md0 / ext3 ...
1
vote
1answer
159 views

LVM striping bottleneck

So, I have a server with a 3.5TB mysql database with innodb file for each table. It has 24 2.5" 10K HDs in 4 disk RAID 10 groups attached as 1TB datastores via vmware ESXi. All 6 are LVM striped into ...
1
vote
4answers
471 views

Shredding data on a live server

Which is the best way to shred all data from a live dedicated server? I have no physical access nor any out of band remote management functionality to the server, only SSH access. Server is running ...
1
vote
1answer
196 views

optimizing ext[234] for small file throughput

I have a system that has a high throughput of small files on disk, i.e. a huge number of small files are created, written and deleted within seconds. Are there any reasonable ext2/ext3/ext4 mount ...
0
votes
2answers
803 views

Message: mkdir() [function.mkdir]: Too many links

We run a web application as a production. Some days ago I discovered the error signed in subject of this theme. I know what's the problem, but want to ask, what is right way for resolve this? Yes, we ...
2
votes
4answers
169 views

Data consistency with RAID 5 and BBWC

I have a few questions about RAID 5, BBWC (Battery Backed Write Cache), filesystem (ext3) and optionally mysql. I have a hypothesis and I ask Server Fault community to validate or not this one: -The ...
4
votes
1answer
1k views

Online resize of large ext3 file system - is performance affected?

I am planning for a resize of a rather large file system hosting an Oracle instance (one of several on the same server). The disk is 4 TB striped over several LUNs, I'm increasing by 1 TB keeping the ...
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?
3
votes
2answers
498 views

Ext3 Stride/Stripe-Width Calculation for 3-Disk Software RAID1E

For reasons too complex to get into here, I'm using a 3-disk RAID1E on some linux systems. See here for more info on that. So my understanding is that for optimizing filesystem layout on this ...
5
votes
1answer
1k views

Why is ext3 so slow to delete large files?

I have a server, which makes an incremental backup of a system every night. Now on saturdays, there is a full backup. But after the full backup has finished, a script kicks in, that deletes the ...
0
votes
0answers
63 views

What causes newlines to be stripped when a buffer is flushed to a full ext3 partition?

We noticed this when we got disk full problems on our log partition. The resulting log files would have many lines concatenated together as if newlines were being stripped. A single line would be ...
3
votes
3answers
960 views

Journaled filesystems and power failure

I heard that even a journaled filesystems such as EXT3/EXT4 might corrupted during power failure, e.g. from wikipedia [1]: In the event of a system crash or power failure, such file systems are ...
5
votes
3answers
715 views

User reduced LVM logical volume without resizing filesystem

I received an email yesterday that one of our users was trying to make room for a heartbeat/clustering package which requires its own partition to act as a voting disk. To do this, he attempted to ...
5
votes
1answer
531 views

What exactly does the automated ext3 root file system check?

Recently we encountered a problem (bad blocks) with an ext3 formatted compact flash card running an embedded Linux system. On startup, the root file system check was started, but it seemed to hang ...
2
votes
2answers
1k views

MySQL InnoDB ext3 block size

I'm looking for recommendations for ext3 filesystem block size for MySQL 5.6 using InnoDB. Running a CentOS 5.4 VM in VMware ESXi 5, VMFS 5 datastore on NetApp FibreChannel LUNs (which have 4k chunk ...
0
votes
2answers
422 views

File system for a lot of small files

I'm using NetApp device as a NAS storage. I have a lot of small files (30-60k) and dirs. For example I have: 30000 dirs with another 1000-2000 dirs. A lot of dirs are empty, but most of them have ...
1
vote
0answers
534 views

Debian package performance on XFS, btrfs, ext3, ext4

I did 4 clean installations of debian 6 and measured time of installing some average virtual package. FS options are default. time apt-get install build-essential I got very strange results ...
2
votes
1answer
665 views

Relatime vs noatime for flash drives

I am running a web server off of a SheevaPlug, and the OS and system are stored on an SD card with an ext3 file system. I know that atime is a major source of writes that wear out flash memory. ...
-2
votes
2answers
277 views

How can I “trick” an ext3 directory to store more than 32000 sub dirs

The easy answers are 1.) move to ext4 and/or 2.) "shard" the directory somehow - by placing them in sub folders either numbered or lettered. These changes won't be easy to make though so I'm looking ...
2
votes
2answers
138 views

Consolidate separate /var and swap drives back to / drive in CentOS

The genius that originally set up the web server at my company put the swap, /var, and / directories on different drive pairs. I need to some how consolidate all three into one drive for migration ...
2
votes
2answers
798 views

After using lvextend, I can't recover unused space

I needed to add more disk space to my CentOS VM, so I added another virtual disk, then used lvextend to add the space to the existing partition. The steps I followed was: echo "- - -" > ...
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 ...
-1
votes
1answer
170 views

format a volume as xfs

I have a partition that is formatted as ext3 I dd unmount it. Formatted as xfs (for quicker format) and I got an error. When I formatted it as ext3 again, it worked. What is the command to format an ...
-1
votes
2answers
522 views

Filesystem check on ext3, debian

How can I perform a filesystem check on ext3 partition on linux? I am looking for a solution that check every file on the filesystem that is it accessible. UPDATE: I would run it on a server without ...
2
votes
1answer
117 views

Recovering the remainder of an ext3 volume spread over multiple lvm physical volumes

I have an LVM logical volume spread over eight separate physical volumes on Amazon AWS. The logical volume is formatted using ext3. One of my physical volumes has failed. Is there any way to recover ...
0
votes
2answers
173 views

Asterisk using 100% of the cpu and freezing my debian host

I have a Debian host $ uname -a Linux voip 2.6.25-2-amd64 #1 SMP Mon Jul 14 11:05:23 UTC 2008 x86_64 GNU/Linux Old asterisk asterisk 1:1.4.21.2~dfsg-3 It has been ...
5
votes
4answers
2k views

Rsync -avzHP follows hardlinks instead of copying them as hardlinks

I use rsnapshot to create hourly/daily/weekly/monthly backups of my "work"-share. Now I'm trying to copy the whole backup-directory onto an external drive using rsync. I used this command/parameters ...
0
votes
3answers
564 views

How many subdirectories does the XFS filesystem support within a given directory?

EXT3 supports 32,000 subdirectories. EXT4 supports 64,000... I've read about people having millions of subdirectories on the XFS filesystem, but can't find an exact value referenced anywhere. How ...
10
votes
10answers
738 views

How does the number of subdirectories impact drive read / write performance on Linux?

I've got an EXT3 formatted drive on a Linux CentOS server. This is a web app data drive and contains a directory for every user account ( there are 25,000 users ). Each folder contains files that ...
0
votes
0answers
118 views

Recover data from failed volume group disk

I have a tale of woe to tell. I had (notice the past tense) a LVM VolumeGroup comprised of two physical volumes that failed due to the accidental deletion of one of those volumes. I am now trying to ...
2
votes
2answers
102 views

What is the best structure to save incremental subfolders?

I have 3 different folders containing particular information about sales orders. Everything was working fine but a few days ago I started having an issue about the amount of subdirectories in each of ...
0
votes
1answer
149 views

Problems with degraded RAID arrays

My Ubuntu backup server was recently upgraded in storage space to a RAID 10 array... now it consists of 8T of raw drive space which was before 2T of space. But I have been having trouble when it ...
1
vote
1answer
925 views

EXT3 vs EXT4 vs XFS

Recently I read a lot about "new" file systems. I checked some benchmarks that show MySQL working faster on EXT4 or XFS (and some other FS). I also "found" that XFS and EXT4 are included in CentOS ...
3
votes
2answers
421 views

ext3 Snapshot Support

Does the ext3 filesystem support snapshotting? If so, is can this be done with straight partitions with no LVM? An example of "straight partitions" would be the following: /dev/sda1 /boot ext3 ...
0
votes
0answers
163 views

recovering a deleted file from a VM snapshot?

Our mysql ibdata1 file was deleted earlier today. This wasn't noticed until mysqld was restarted and there was no data in the tables. The machine is a CentOs VM in Xenserver. At this point a ...
2
votes
3answers
302 views

Recover data from EXT3 filesystem

Our junior sysadmin accidently deleted some of the directories. Can anyone please suggest any free/proprietary application to recover files from an EXT3 filesystem (RHEL 5.x) ?
1
vote
1answer
181 views

“hot swapping” linux md raid1 - does re-mounting file-system temporarily read-only enable safe disconnection?

There's is an ext3 filesystem on top of Linux md raid1, array consists of two hard drives. Various services, including databases run on and write to it. Let's say for argument's sake that to minimize ...
2
votes
2answers
136 views

Storing 64000+ files and growing in one folder (ext3)

I'm using a directory as a staging area for my files before shipping them to Amazon S3 buckets. This staging directory has no sub-directory structure /a/b/c or /year/month/day ... it's only files ...
2
votes
1answer
137 views

double mount check with ext3

I have two nodes connected to a SAN, and I want to be able to mount an ext3 partition on node B when node A goes down. I know I could use a shared filesystem, but for simplicity and performance I ...
2
votes
0answers
256 views

Updating OpenBoot PROM on Sun Fire v440

After i have updated ALOM firmware on Sun Fire v440, i decided to update OpenBoot PROM, but when i try to load the patch using boot disk /flash-update-SunFire440 i get: SILO Fatal Error: Multiple ...