UFS benifits Post: 50144

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Special Forums Hardware Filesystems, Disks and Memory UFS benifits Post 50144 by norsk hedensk on Friday 16th of April 2004 05:28:09 PM

04-16-2004

Registered User

UFS1 is the native BSD filesystem. correct me if i am wrong, but i would think the filesystem choice dosnt make much of a difference, it really only matters depending on if you are doing something different with the disk. older DOS filesystems, like DOS6 only can have 8 characters for a filename. and then you have ext2 which was the default linux filesystem, names can be as long as you want, and generally keeps your data pretty well on large drives. now the general trend is to use reiserFS, reiserFS is probably the fastest filesystem for linux and is not prone to corrupting data when something goes wrong.

anyway, unless you have some type of specific reason for wanting to use a certain filesystem, use whatever most people use for your system. if your OS is linux, your best bet would be reiserfs, if you are using freebsd, UFS is mostly used. though i think os's like netbsd are using reiserfs or ext3 now.

im no expert on this so anyone who has more knowledge than me on the subject please correct any mistakes i may have made.

norsk hedensk

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LEARN ABOUT REDHAT

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)

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