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post #11 of 20
with regards to undelete, as far as I know, the mainline filesystems are pretty much the same in this regard. XFS was still unstable the last time I tried. Ext3 is tried and true, ext4 is improved on that and so far I have no complaints. Reieser 4 had some promise several years ago .. but then then the developer went and murdered his wife.. After that the community kind of disassociated from his work.

metadata blocks (inodes)
point to full data blocks

# rm -rf /mnt/extdisk/*

whoops
i've done that 5 or 6 times over the years. it happens

now, all of the inodes specifying what files were where have been erased, but the data on the disk is still there. UNTIL i start writing other stuff in it's place.

# ls -lR /mnt/extdisk
<empty>

# umount /mnt/extdisk
# strings /dev/vg1/vext1
<will show non zero data, still containing your files, somewhere in there>

As far as an undelete tool goes, I've never bothered, but I know some do exist for ext filesystems. http://www.google.com/search?sourcei...=ext4+undelete

What did you do?

There's also scripts out there to setup a trash bin, e.g http://ubuntuforums.org/showthread.php?t=569049

A proper backup strategy is a non-trivial task. I've never had it all setup the way i want it. Try to prioritize your most important data, and make sure you have a copy of that AND another one in another building. I've got an open project to get that all sorted out again.. i'm rolling good with ubuntu now.. F gentoo
Edited by lloyd mcclendon - 4/9/11 at 7:35pm
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post #12 of 20
Thread Starter 
Quote:
Originally Posted by error10 View Post
Ext4 destroys the directory entry when you delete a file, which obliterates the file's name, allocated blocks, and other such metadata.
are there any linux file systems that don't do that
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post #13 of 20
Quote:
Originally Posted by 3dfxvoodoo View Post
are there any linux file systems that don't do that
thought they all did it that way?

honestly, yeah, linux might have way more FS's to choose from than windows or mac, but there is a reason why windows and mac only have the one...i'd honestly hate to recommend something other than ext...about the only other one i have any large amount of experience with would be reiserFS, but that would be sticky to get into atm...as there is no longer any support for it as its creator is whackadoo and killed his wife and setting in prison for another 15 years...

i've played around with jfs, it seems pretty solid, might want to consider that one...btrfs seems to be the new "hottest" FS for linux...
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post #14 of 20
Quote:
Originally Posted by 3dfxvoodoo View Post
are there any linux file systems that don't do that
I don't think so. And why in the world would you ever want one?
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post #15 of 20
awww, do you need the recycle bin back? lol

see the link i posted. You can set a global alias for rm to 'get this out of here but do not actually rm', i think that's what you want. any file system is going to delete the file pointer when you issue it the delete command.
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post #16 of 20
Quote:
Originally Posted by 3dfxvoodoo View Post
whats Reiserfs and XFS like?



EDIT:lol XFS is made by Silicon Graphics
ReiserFS is killer good, like wife killer good.
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post #17 of 20
Thread Starter 
Quote:
Originally Posted by lloyd mcclendon View Post
awww, do you need the recycle bin back? lol

see the link i posted. You can set a global alias for rm to 'get this out of here but do not actually rm', i think that's what you want. any file system is going to delete the file pointer when you issue it the delete command.
I'll look into that


I tell ya
geting back the files I need out of 30tb of data with all the files name a # is not fun


I'm finding most of them just a small chuck of what I need
like vids are just the first 3 sec


Quote:
Originally Posted by Bruno2 View Post
ReiserFS is killer good, like wife killer good.
lol siged


last I used ReiserFS was when I first started useing linux
if I recall it was like Fedora 6 or 8
I did like it if I recall
Edited by 3dfxvoodoo - 4/9/11 at 9:12pm
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post #18 of 20
Quote:
Originally Posted by Devoid View Post
From what I understand (haven't tried using it myself, so don't take this as fact), XFS is generally slower than Ext4. It also tends to exhibit problems with grub is /boot is formatted as XFS. It's also supposed to have poor performance when dealing with large files (multiple file transfers, many files being deleted, etc).
You have it backwards. XFS is awesome with large files, but slow with small files. This is why it is not a good idea to use XFS for a system partition, but is a great idea to use it as a streaming media filesystem (like for your movie iso's, etc.) I use XFS for my storage partition and transferring large files to and fro is faster than ext4.

Quote:
Reiserfs3 development has stopped, so I dunno how desirable it would be. Reiserfs4 has not yet been properly merged with the Linux kernel and doesn't have the best support for most distros.
You can use ReiserFS, but just don't drop the soap if you do.
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post #19 of 20
Quote:
Originally Posted by thiussat View Post
You have it backwards. XFS is awesome with large files, but slow with small files. This is why it is not a good idea to use XFS for a system partition, but is a great idea to use it as a streaming media filesystem (like for your movie iso's, etc.) I use XFS for my storage partition and transferring large files to and fro is faster than ext4.
Yea I definitely meant to say "multiple files" not "large files". I did mention later on that XFS was better at larger single files, which is somewhat contradictory to what I had said haha. Proofreading ftw?

~Devoid~
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post #20 of 20
If memory serves, FAT is really good at file recovery (used Norton's UnDelete a few times back in the day... DOS days) Can only address 2Gb & 8.3 filenames, not much use now.......

I think you're after the magic bullet, the holy grail - it's not going to happen. Ext3 is used by many servers around the world, as is JFS (and UFS2, but I don't think you can use that on Linux). Ext3 is rock solid, gets my vote. JFS isn't maintained (I think), but it's very mature and safe
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