Ok. Here it is. I limited access to my external hard disk's partition/volume on Mac os X simply by changing permissions in Get Info window. But now the hard disk icon has disappeard and wont mount. Have tried different kind of soft to mount, but no luck. Then there is the utility called Terminal,... (0 Replies)
Hi,
We have 200GB SAN volume mounted on Redhat EL 5. which is working fine. As my SAN supports dynamic resizing of volumes, i unmounted the volume and resized the SAN Volume to 300 GB successfully. Then i mounted again but it shows 200GB only but data is intact.
Now, my requirement is to let... (3 Replies)
as the title states, i cant mount suse of apple volumes on either box. have tryed afpfs-ng but no love.
anyone have a suggestion than samba (because i dislike MS) and NFS because i don't know jack about it..... yet
thanks in advance
julz (4 Replies)
Greetings,
I am running HP-UX 10.2 and /usr is out of disk space already. I installed IE 5.0 for UNIX on my machine under /usr and browsed the Internet for a while and presto no more disk space.
I have plenty of hard disk space on my computer so would like to expand the size of the volume. The... (5 Replies)
Hi
I have recently install ubuntu on my laptop. I have tried to access my external drive wich is NTFS format but i get the following error: ´Cannot mount volume´
Can someone help me please?? (2 Replies)
Hi,
I am new to unix. I am working on Red Hat Linux and side by side on AIX also. After reading the concepts of Storage, I am now really confused regarding the terminologies
1)Physical Volume
2)Volume Group
3)Logical Volume
4)Physical Partition
Please help me to understand these concepts. (6 Replies)
I have the need to Mount one of my volumes (All machines are mac) onto all of the machines in the lab from time to time. At the moment I'm using SSH to tunnel into each machine and then send a command to the remote machine to mount my volume using AFP.
This seems convoluted to me. Is there a... (3 Replies)
Hi ,
I am completely stuck and not getting any clue to come out this . So looking for help
Q : I have salaries 10 in server with that Dell Equallogic storage connected.
in dell Equlalogic in i have 70 TB storage .
I created 7 volumes 10 TB each .
In Solaries 10 i have syslog server i... (1 Reply)
Dear all
First of all, my English not so good.
We have p52a (production server) and p52a (test server). Tape drives are VXA2.
When both servers were AIX 5.3, mksysb on production server and restoring to test server was OK.
The production server was AIX 5.3 and recently upgraded to... (3 Replies)
Discussion started by: fifa15pc
3 Replies
LEARN ABOUT DEBIAN
bup-margin
bup-margin(1) General Commands Manual bup-margin(1)NAME
bup-margin - figure out your deduplication safety margin
SYNOPSIS
bup margin [options...]
DESCRIPTION
bup margin iterates through all objects in your bup repository, calculating the largest number of prefix bits shared between any two
entries. This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.
For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45. That means a 46-bit
hash would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
its first 46 bits.
The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects. Since SHA-1 hashes have 160 bits,
that leaves 115 bits of margin. Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
with far fewer objects.
If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see if
you're getting dangerously close to 160 bits.
OPTIONS --predict
Guess the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
from the guess. This is potentially useful for tuning an interpolation search algorithm.
--ignore-midx
don't use .midx files, use only .idx files. This is only really useful when used with --predict.
EXAMPLE
$ bup margin
Reading indexes: 100.00% (1612581/1612581), done.
40
40 matching prefix bits
1.94 bits per doubling
120 bits (61.86 doublings) remaining
4.19338e+18 times larger is possible
Everyone on earth could have 625878182 data sets
like yours, all in one repository, and we would
expect 1 object collision.
$ bup margin --predict
PackIdxList: using 1 index.
Reading indexes: 100.00% (1612581/1612581), done.
915 of 1612581 (0.057%)
SEE ALSO bup-midx(1), bup-save(1)BUP
Part of the bup(1) suite.
AUTHORS
Avery Pennarun <apenwarr@gmail.com>.
Bup unknown-bup-margin(1)