04-12-2008
Recover data from 2 files then combine
Using dd or similar tools to recover data from 2 damaged cdroms, I need a way to then combine the 2 files, 1 from each cd, and make a good file: this all result from finding that certain cd's tops scratch easily even when using the "proper" cd markers, hence making the file useless, however the back up copy is the same-I am going to assume that the damage to the files are in different "bits", and attempt to recover what i can. any ideas? files are 26megs, they were originally produced in corel drawing program. I can see the holes in the cd tops.
thanks in advance.
8 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I have 5 files basically;namely file1.txt situated each at folder A to E respectively.
I would like to extract out third column from each of these file1.txt from folder A to folder E. Also, I wanted to extract the first and second column which are common. In other words, e.g
... (6 Replies)
Discussion started by: ahjiefreak
6 Replies
2. Shell Programming and Scripting
my first post ... please be gentle.
I have been working on a script to get info out of mysql. Its a support ticket system database OTRS. I can write the subject of open tickets to a text file with a unique user id.
I also have a text file with the unique user id, username and email adres. I... (11 Replies)
Discussion started by: dicenl
11 Replies
3. Red Hat
Hello,
Given a scenario, I have 2 HDD which were used on the server with software RAID. Now, the original server crashed and I have attached these 2 HDD to the new server.
Any possible chances to recover the data from any of this HDD ? I want to mount /dev/sdb3 on some folder..
Output of... (3 Replies)
Discussion started by: chinmay
3 Replies
4. Shell Programming and Scripting
hi people;
this is my file1.txt:192.168.1.1
192.168.1.2
192.168.1.3
192.168.1.4
...
this is my file2.txt:portnames
usernames
maxusercap
...
i want to write to file3.txt:l ./getports 192.168.1.1 'get all;l+;get . portnames;l-'
l ./getports 192.168.1.1 'get all;l+;get . usernames;l-'... (4 Replies)
Discussion started by: gc_sw
4 Replies
5. Shell Programming and Scripting
I have a main file as follows
aaa 3/2 = 1.5
aba 55+6 = 61
aca 67+8 = 75
hjk 3+3 = 67
ghd 66+30 = 96
ghj 99-3 = 96
ffg 67+3 = 70
I have 4 sub files named sub1, sub2, sub3, sub4
content of sub1
aaa 23+5 = 28
hjk 45+6 = 51
ghd 40-20 = 20
... (2 Replies)
Discussion started by: jackevan
2 Replies
6. Shell Programming and Scripting
i made a script on my own. this is for the inventory to all of my AWS servers, and i run it to all of my servers to get the hostname, please look at file2. Then i need some data in file3 as well,. i need to combine them
#cat file1
192.10.1.41
server.age.com
######
192.10.0.40
ssh cant... (10 Replies)
Discussion started by: kenshinhimura
10 Replies
7. Shell Programming and Scripting
File 1
ID Name Po1 Po2
DD134 DD134_4A_1 NN-1 L_0_1
DD134 DD134_4B_1 NN-2 L_1_1
DD134 DD134_4C_1 NN-3 L_2_1
DD142 DD142_4A_1 NN-1 L_0_1
DD142 DD142_4B_1 NN-2 L_1_1
DD142 DD142_4C_1 NN-3 L_2_1
DD142 DD142_3A_1 NN-41 L_3_1
DD142 DD142_3A_1 NN-42 L_3_2
File 2 ( Combination of... (1 Reply)
Discussion started by: pareshkp
1 Replies
8. Shell Programming and Scripting
Hi,
How can I combine the data of of three files into one new file?
I try to give as much informations as possible.
The three existing files are called file1 file2 and file3
the new file should named output_combined.
The size of the files will be around 900 words/lines each .. but always... (5 Replies)
Discussion started by: MyMemberName
5 Replies
LEARN ABOUT DEBIAN
bup-fsck
bup-fsck(1) General Commands Manual bup-fsck(1)
NAME
bup-fsck - verify or repair a bup repository
SYNOPSIS
bup fsck [-r] [-g] [-v] [--quick] [-j jobs] [--par2-ok] [--disable-par2] [filenames...]
DESCRIPTION
bup fsck is a tool for validating bup repositories in the same way that git fsck validates git repositories.
It can also generate and/or use "recovery blocks" using the par2(1) tool (if you have it installed). This allows you to recover from dam-
aged blocks covering up to 5% of your .pack files.
In a normal backup system, damaged blocks are less important, because there tends to be enough data duplicated between backup sets that a
single damaged backup set is non-critical. In a deduplicating backup system like bup, however, no block is ever stored more than once,
even if it is used in every single backup. If that block were to be unrecoverable, all your backup sets would be damaged at once. Thus,
it's important to be able to verify the integrity of your backups and recover from disk errors if they occur.
WARNING: bup fsck's recovery features are not available unless you have the free par2(1) package installed on your bup server.
WARNING: bup fsck obviously cannot recover from a complete disk failure. If your backups are important, you need to carefully consider
redundancy (such as using RAID for multi-disk redundancy, or making off-site backups for site redundancy).
OPTIONS
-r, --repair
attempt to repair any damaged packs using existing recovery blocks. (Requires par2(1).)
-g, --generate
generate recovery blocks for any packs that don't already have them. (Requires par2(1).)
-v, --verbose
increase verbosity (can be used more than once).
--quick
don't run a full git verify-pack on each pack file; instead just check the final checksum. This can cause a significant speedup
with no obvious decrease in reliability. However, you may want to avoid this option if you're paranoid. Has no effect on packs
that already have recovery information.
-j, --jobs=numjobs
maximum number of pack verifications to run at a time. The optimal value for this option depends how fast your CPU can verify packs
vs. your disk throughput. If you run too many jobs at once, your disk will get saturated by seeking back and forth between files
and performance will actually decrease, even if numjobs is less than the number of CPU cores on your system. You can experiment
with this option to find the optimal value.
--par2-ok
immediately return 0 if par2(1) is installed and working, or 1 otherwise. Do not actually check anything.
--disable-par2
pretend that par2(1) is not installed, and ignore all recovery blocks.
EXAMPLE
# generate recovery blocks for all packs that don't
# have them
bup fsck -g
# generate recovery blocks for a particular pack
bup fsck -g ~/.bup/objects/pack/153a1420cb1c8*.pack
# check all packs for correctness (can be very slow!)
bup fsck
# check all packs for correctness and recover any
# damaged ones
bup fsck -r
# check a particular pack for correctness and recover
# it if damaged
bup fsck -r ~/.bup/objects/pack/153a1420cb1c8*.pack
# check if recovery blocks are available on this system
if bup fsck --par2-ok; then
echo "par2 is ok"
fi
SEE ALSO
bup-damage(1), fsck(1), git-fsck(1)
BUP
Part of the bup(1) suite.
AUTHORS
Avery Pennarun <apenwarr@gmail.com>.
Bup unknown- bup-fsck(1)