Looking for suggestions as to which filesystem to go with. I currently use gfs2 on hosts with 3.4tb useable. I understand gfs2 is being left behind but xfs and ext4 are not quite certified completely on CentOS 5.2. I have email storage hosts that have a decent i/o requirement and 12TB usable after... (12 Replies)
Gidday,
Are you using ext4 for production system? Or is it better to opt for a more
conservative strategy, like ext3 for instance?
What are your experiences?
Thanks in advance,
Loïc. (3 Replies)
Hi,
I would like to ask about actions taken if any regarding having a few bad sector (67 bad sector according to DISK UTILITY) on my root ext partition except from buying a new HD and cloning it since my laptop is a 1 year old.
Question:
About clonzilla before this bad sector happens i used... (5 Replies)
Hi there,
I have a problem with Unix kernel programming.
I have to write a program who should output the whole information the EXT4 extents contain. I have found many tutorial and information about how the EXT4 filesystem is working. Also There ar many information about the EXT4 structure but I... (1 Reply)
Hello!
I am in a weird problem of not able to set quota on an ext4 file system. I have setup a logical volume on which this ext4 filesystem resides. It's going to be used by an application for dumping data. But we want to setup quota so that it does not consume all the free space of the lv. The... (5 Replies)
Hello everyone,
I am trying to mount an ext4 filesystem which I created from Ubuntu. But mount command fails saying:
prakhar@Solaris:~$ sudo mount /dev/dsk/c10t0d0p1 /mnt
Password:
mount: /dev/dsk/c10t0d0p1 is not this fstype
And I also tried this:
prakhar@Solaris:~$ fstyp... (6 Replies)
Hi
I have a shell script to copy a pattern of files from Linux to Windows Filesystem.
When i execute the below command
cp -av TOUT_05-02-13* Windows/Folder
`TOUT_05-02-13-19:02:37.tar.gz' -> `Windows/Folder/SYSOUT_05-02-13-19:02:37.tar.gz'
cp: cannot create regular file... (5 Replies)
I'm trying to understand the difference between o_direct flag of open system call and dax (direct access) with ext4 filesystem.
According to my understanding both bypass page cache.
But I'm still unclear about the crucial difference between these 2 techniques. If there is a huge difference... (1 Reply)
Hello guys,
I would like to ask you kindly if you don't know some quick and safe method how to shrink ext4 filesystem and reduce the size of a Logical Volume in Linux, please?
Thank you very much. (2 Replies)
Discussion started by: los_bandidos
2 Replies
LEARN ABOUT SUNOS
e2undo
E2UNDO(8) System Manager's Manual E2UNDO(8)NAME
e2undo - Replay an undo log for an ext2/ext3/ext4 filesystem
SYNOPSIS
e2undo [ -f ] [ -h ] [ -n ] [ -o offset ] [ -v ] [ -z undo_file ] undo_log device
DESCRIPTION
e2undo will replay the undo log undo_log for an ext2/ext3/ext4 filesystem found on device. This can be used to undo a failed operation by
an e2fsprogs program.
OPTIONS -f Normally, e2undo will check the filesystem superblock to make sure the undo log matches with the filesystem on the device. If they
do not match, e2undo will refuse to apply the undo log as a safety mechanism. The -f option disables this safety mechanism.
-h Display a usage message.
-n Dry-run; do not actually write blocks back to the filesystem.
-o offset
Specify the filesystem's offset (in bytes) from the beginning of the device or file.
-v Report which block we're currently replaying.
-z undo_file
Before overwriting a file system block, write the old contents of the block to an undo file. This undo file can be used with
e2undo(8) to restore the old contents of the file system should something go wrong. If the empty string is passed as the undo_file
argument, the undo file will be written to a file named e2undo-device.e2undo in the directory specified via the E2FSPROGS_UNDO_DIR
environment variable.
WARNING: The undo file cannot be used to recover from a power or system crash.
AUTHOR
e2undo was written by Aneesh Kumar K.V. (aneesh.kumar@linux.vnet.ibm.com)
AVAILABILITY
e2undo is part of the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net.
SEE ALSO mke2fs(8), tune2fs(8)E2fsprogs version 1.44.1 March 2018 E2UNDO(8)