10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
UNIX sco release 5.05 system does not boot:
cannot open device hd(40)/boot
stage 1 boot failure: error loading hd(40)/boot
what to do? (5 Replies)
Discussion started by: Joaoalpande
5 Replies
2. SCO
UNIX sco release 5.05 system does not boot:
cannot open device hd(40)/boot
stage 1 boot failure: error loading hd(40)/boot
what to do? (1 Reply)
Discussion started by: Joaoalpande
1 Replies
3. UNIX for Dummies Questions & Answers
UNIX sco release 5.05 system does not boot:cannot open device hd(40)/boot
stage 1 boot failure: error loading hd(40)/bootWhat to do? (2 Replies)
Discussion started by: Joaoalpande
2 Replies
4. SCO
hi
Knows someone what kind of file system uses SCO Unix 5.0.6?
Which linux or unix LIVE CD can read and write into file system from SCO Unix?
I've tried to boot SCO using Knoppix 6.2.1 LIVE CD, but cannot mount.
# mount -t sysv /dev/sda1 /mnt
mount: wrong fs type, bad option, bad superblock... (2 Replies)
Discussion started by: ccc
2 Replies
5. SCO
Hello All,
I have a SCO Unix server and when I do the command
"df -kP" I get the following:
Filesystem 1024-blocks Used Available Capacity Mounted on
/dev/root 2048000 934936 1113064 46% /
/dev/boot 15360 6419 8941 42% /stand
It should say
Filesystem 1024-blocks Used Available... (4 Replies)
Discussion started by: mikep9
4 Replies
6. UNIX for Dummies Questions & Answers
another unix printing issue.
our client based pc's used to print some form's to our hp printer. as of the moment they can not print.
i have checked & did the ff:
#lpstat -r (scheduler is running)
i dunno if i need to restart the whole unix box via shutdown or just checking at... (15 Replies)
Discussion started by: jedimaster
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7. UNIX for Dummies Questions & Answers
Hi,
In my company, we are using SCO UNIX system and Informix database. Recently, there have been a lot of users accessing to server and sometimes it has made server run very slow. So, I intend to limit number of users of 30 only. Although I have tried to search on the Internet for several days,... (1 Reply)
Discussion started by: trinhnguyen
1 Replies
8. SCO
Hi Guys
I have got a problem and I would really be grateful if some1 could sort out the problem.
I have got a healthcare system named MEDISCAN, its SCO Unix based system, I need to convert the data files into ORACLE data.
The problem is that I have been unable to open the files, whatever... (1 Reply)
Discussion started by: Faysal_Mazhar
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9. Filesystems, Disks and Memory
Hi everyone i have a question for all of you. It may be basic or it may be a good one. I recently aquired a copy of "SCO TCP/IP runtime System for SCO Unix" (thats what the disks say) and for the life of me i can not get it to load. i have tried opening the disk in linux and it can not determine... (0 Replies)
Discussion started by: Cerberus
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10. UNIX for Dummies Questions & Answers
I was just wondering if there is a way to recursive grep for something in this version of UNIX... so that I don't have to do it a directory at a time? (1 Reply)
Discussion started by: PBNOSGT
1 Replies
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)