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Rogério Brito
*nix forums Guru Wannabe
Joined: 01 Mar 2005
Posts: 226
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Rogério Brito
*nix forums Guru Wannabe
Joined: 01 Mar 2005
Posts: 226
|
 Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: USB 2.0 Drive Reliability/Stability?
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On Feb 02 2005, Joerg Johannes wrote:
| Quote: | However, I just ordered a firewire/USB 2.0 combo Hard disk, I hope the
firewire thingy will work better.
|
Well, I have an HD enclosure (Pyro Dual Link Drive Kit DLX-185) with a
regular IDE HD inside of it. The enclosure has two connectors: one is a USB
2.0 and the other is a Firewire port.
I had problems getting filesystem corruption when I used it with the USB
port (at the time, I didn't have a Firewire card), with the SCSI layer
saying that the media was removed from the device (something quite weird
indeed, as it was in the middle of an rsync and I obviously didn't mess
with it when I was doing such copies).
It was reproducible, but I didn't have the opportunity of testing it
further and sending a proper bug report to the kernel mailing list.
Now that I have a vanilla Firewire card, I can use the same drive without
any problems. In fact, I'm using this drive with an HFS+ filesystem so that
I can easily share data between my Mac and Linux.
Cheers, Rogério.
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Clive Menzies
*nix forums Guru
Joined: 21 Feb 2005
Posts: 533
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| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: RAM information
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On (02/02/05 09:09), Ron Johnson wrote:
| Quote: | On Wed, 2005-02-02 at 13:16 +0530, Ritesh Raj Sarraf wrote:
Hi,
I've a Compaq laptop with 256mb RAM (266mhz). I'm planning to add more
RAM into it.
Can I add another 512mb (266mgz) RAM from some other vendor, say
kingston or samsung ??
Will a combination of 512 and 256 make conflicts ???
Companies that specialize in selling RAM would have that information.
Check www.crucial.com they have a wizard that detects your hardware and |
recommends memory to suit - they also have a download for Belarc which
provides a lot of detailed info on your setup. Unfortunately both of
these are windows apps ;(
In the UK crucial's service is really good. We've bought quite a lot
from them and when we had to change a stick that we'd ordered by mistake
they exchanged it immediately.
Regards
Clive
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Micha Feigin
*nix forums addict
Joined: 25 Feb 2005
Posts: 95
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| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: Debian packages similar to mathematica or mathlab ?
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On Tue, 01 Feb 2005 19:47:20 -0500
Jack Nguy <Jack@JackNguy.com> wrote:
There's also a version of maple and matlab for linux (x86 only I believe). They
both have versions for mac osX but not mac linux.
As for replacements. The closest things to matlab are octave and scilab. scilab
looks a bit more mature to me since it uses external libraries to do the work,
which leaves the developers a lot less to do. It looks less polished then matlab
but excluding toolboxes it seems to do everything (it does have an image
processing toolbox that uses imagemagick). Its available at least for linux and
windows, probably more.
There is also GNU R which is a free replacement for S (the matlab equivalent in
statistics according to the docs).
For more maple/mathematica like replacements I know a bit less but a few options
that seem to come up are maxima (looks rather good), axiom(seems to be best used
with texmacs as an interface), pari-gp (mainly number theory but does other
things also, includes a c library) and yacas(supposed to have similar syntax to
mathematica and supports arbitrary precision arithmetic)
Other options are perl with the pdl extension and python-numeric or c with the
numerous math libraries.
For linear algebra some options are
atlas
blas
lapack
gandlaf has a few of these and includes some image
creation/manipulation/processing functionality
arpack for eigenvalue manipulation.
For 2D/3D plotting some of the options:
pgplot
plplot
gnuplot
opendx
For Fourier (fft/dft) you have several variations of fftw.
At least most if not all of these will also work under windows and probably the
mac and some other Unixes.
There are probably a few others I missed, but I believe that these are the major
options (will be happy to hear about any more good alternatives to these, I'm
trying to compile a list of various free solutions to mathematical work).
| Quote: | Jack Nguy
Vincent Lefevre wrote:
On 2005-01-18 13:13:24 +0100, Gerard Robin wrote:
On Tue, Jan 18, 2005 at 08:54:39AM +0100, Bob Alexander wrote:
For now I only need some basic stuff to quickly check arithmetic and
algebraic computations ... very simple stuff like:
(17^2-5^3)/(17+3*2^3)*((18^2/9^2+(13-4*3^2:6)^2-2*(8^2-2*3*7)+1))/5
try bc
Do you mean that bc can work on rational numbers?
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Rogério Brito
*nix forums Guru Wannabe
Joined: 01 Mar 2005
Posts: 226
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| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: howto make my own install cdrom
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On Feb 01 2005, Paul wrote:
| Quote: | My initial question was for installing on another pc .. rather than
download all the deb's all over again, I wanted to take them and create
my own install cdrom(s) .. I stumbled upon a package called debian-cd,
which seems to fit my need.
|
I've been using apt-move for the past few years to grab the downloaded
packages from apt's cache and move them into my "private snapshot" of
Debian, containing only packages that I care about.
It works well, in my experience.
Hope this helps, Rogério.
--
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Wayne Topa
*nix forums Guru Wannabe
Joined: 21 Feb 2005
Posts: 126
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| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: switch from 2.4.24 lvm1 to 2.6.10 lvm 2 problems
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Benedict Verheyen(benedict.verheyen@sjki.be) is reported to have said:
| Quote: | Hi,
so i tried several STOCK debian kernels 2.6.9 and 2.6.10 to get a 2.6
kernel and
lvm2 going. Both of them give again this error:
1 PV(s) found for VG main: expected 0
Unable to find volume group main
ntfs drivber 2.1.22 [Flags: R/O module]
pivot_root: No such file or directory
/sbin/init: 431: Cannot open /dev/console: No such file
Kernel panic - not syncing: Attempted to kill init
1) How come that even after i update all related tools to support LVM2 and
a 2.6 kernel, that a stock debian 2.6 kernel is not able to handle my root
on LVM? 2.4.24 works ok though.
( i tried 3a00, /dev/main/lv_root, /dev/mapper/main-lv_root as root
devices but for all i get the same error)
2) I then tried to compile my own kernel from the config of the stock
kernels and putting lvm and ext3 support direct into the kernel.
However when i want to make an initrd i get these:
root@arthur:/boot[14:51:46]# mkinitrd -o initrd.img-2.6.10.31jan2005
-r /dev/main/lv_root 2.6.10.31jan2005
/usr/sbin/mkinitrd: /dev/main/lv_root: Kernel does not support LVM
Wuh? I compile lvm2 into the kernel and i get "Kernel does not support LVM"
How weird is that. Is this a mkinitrd bug?
So a stock kernel can't reach lvm, a self compiled one neither so how am i
going to switch to a 2.6 kernel?
This is an ongoing pain IMHO on Debian. Probably my own fault but nontheless
a pain.
Thanks,
Benedict
|
do a grep on your /boot/config-2.6.10 for the following
CONFIG_MD=y
CONFIG_BLK_DEV_DM=y
Those are all I have enabled for a working LVM2. Note that I do not
have / setup as LVM so I don't have a problem. ISTR reading
something, from a Google search, on what you have to do to boot from a
LVM partition. Don't remember the particulars as I had no intention
of doing it that way.
:-) HTH, YMMV, HAND 
Wayne
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Benedict Verheyen
*nix forums Guru Wannabe
Joined: 22 Feb 2005
Posts: 101
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| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: switch from 2.4.24 lvm1 to 2.6.10 lvm 2 problems
|
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Wayne Topa wrote:
| Quote: | snip
do a grep on your /boot/config-2.6.10 for the following
CONFIG_MD=y
CONFIG_BLK_DEV_DM=y
Those are all I have enabled for a working LVM2. Note that I do not
have / setup as LVM so I don't have a problem. ISTR reading
something, from a Google search, on what you have to do to boot from a
LVM partition. Don't remember the particulars as I had no intention
of doing it that way.
:-) HTH, YMMV, HAND
Wayne
Thanks Wayne, |
well i've had a similar problem 2 months back and i solved it. Just not
sure how.
Having / on LVM is another level of difficulty but i like having root on
LVM.
Anyway, i found a couple of things i can still try.
First i'll try a standard kernel and change the modules loaded in
/etc/modules and making sure that at least these are in there
ext3
dm_mod
ide_generic
ide_cd
ide_disk
piix
Then i'll vi /etc/mkinitrd/mkinitrd.conf and
change ROOT=probe to ROOT=/dev/main/lv_root
And aftewards make in initrd again hoping it now detects the root
correctly and includes
the modules listed in /etc/modules.
Then i think the initrd will at least see the lvm2 root partition and
load the appropriate
modules. I hope this will solve the problem.
Regards,
Benedict
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paul
*nix forums beginner
Joined: 22 Feb 2005
Posts: 28
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| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: realplayer 10 debian package
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chris-usenet@roaima.co.uk wrote:
| Quote: | Paul <paula4l@access4less.net> wrote:
I get stalled at the screen 'Testing your media player' and have to
click the manual setting system and hit play.. but eventually it will play.
You may be missing the correct libraries in the web browser plugins
directory. I use firefox and /usr/lib/mozilla-firefox/plugins contains
(at least) these two files:
* nphelix.so
* nphelix.xpt
Chris
|
Yes, mine are soft links. Do you have solf links or the actual file?
paul
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paul
*nix forums beginner
Joined: 22 Feb 2005
Posts: 28
|
| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: howto make my own install cdrom
|
|
|
Rogério Brito wrote:
| Quote: | On Feb 01 2005, Paul wrote:
My initial question was for installing on another pc .. rather than
download all the deb's all over again, I wanted to take them and create
my own install cdrom(s) .. I stumbled upon a package called debian-cd,
which seems to fit my need.
I've been using apt-move for the past few years to grab the downloaded
packages from apt's cache and move them into my "private snapshot" of
Debian, containing only packages that I care about.
It works well, in my experience.
Hope this helps, Rogério.
|
Yes, thanks. I started using it yesterday. It seems to work well here too.
paul
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Ritesh Raj Sarraf
*nix forums Guru Wannabe
Joined: 20 Feb 2005
Posts: 103
|
| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: RAM information
|
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|
On Wed, 2 Feb 2005 15:22:32 +0000, Clive Menzies
<clive@clivemenzies.co.uk> wrote:
| Quote: | Companies that specialize in selling RAM would have that information.
Check www.crucial.com they have a wizard that detects your hardware and
recommends memory to suit - they also have a download for Belarc which
provides a lot of detailed info on your setup. Unfortunately both of
these are windows apps ;(
In the UK crucial's service is really good. We've bought quite a lot
from them and when we had to change a stick that we'd ordered by mistake
they exchanged it immediately.
|
Thanks a lot. It helped me gather a lot of information on memory technology.
:-)
rrs
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jim biri
*nix forums beginner
Joined: 21 Feb 2005
Posts: 37
|
| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: IDE Disk Controllers: Natively supported / detecting them ....
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|
Thanks.
So - how do I find out what cards/chipsets are supported in the 2.6
kernel before installing it?
Jim.
On Wed, 2 Feb 2005 14:42:25 +0100 (CET), Ernst-Magne Vindal
<ernst@vindal.com> wrote:
| Quote: |
if U're no sure about the module name, run "modconf" and look at available
modules
On Wed, 2 Feb 2005, jim biri wrote:
Hi Christopher,
Thanks for replying yet again ....... and sorry to keep banging on
about this stuff .... but, yet another question .......
When you plug in the card, linux'll probably not do anything, since your
kernel might not have the modules needed loaded into it. In which case
you should do
modprobe "module_name"
depending on which car you've got (and which kernel you've got).
For instance:
modprobde pdc202xx_new
OK - so my dumb-ass question is .... how do you know what to probe
for? can you probe for just part of the name e.g. modprobede pdc* - or
do you have to know the precise name of the module to probe for?
Thanks yet again .......
Jim.
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Joerg Johannes
*nix forums beginner
Joined: 02 Mar 2005
Posts: 5
|
| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: USB 2.0 Drive Reliability/Stability?
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|
Am Mittwoch, den 02.02.2005, 13:12 -0200 schrieb Rogério Brito:
| Quote: | On Feb 02 2005, Joerg Johannes wrote:
However, I just ordered a firewire/USB 2.0 combo Hard disk, I hope the
firewire thingy will work better.
Well, I have an HD enclosure (Pyro Dual Link Drive Kit DLX-185) with a
regular IDE HD inside of it. The enclosure has two connectors: one is a USB
2.0 and the other is a Firewire port.
|
I'm waiting for the Western Digital WDXB<blah> 250 GB. Should be similar
to yours.
| Quote: | Now that I have a vanilla Firewire card, I can use the same drive without
any problems. In fact, I'm using this drive with an HFS+ filesystem so that
I can easily share data between my Mac and Linux.
Does that work OK for you? I just ordered a Mac, too, and I'm still |
undecided wether to format the HD with HFS+ or FAT32...
joerg
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Carlos Ribeiro
*nix forums beginner
Joined: 19 Feb 2005
Posts: 12
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| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: Old post: Writing to SMB share fails from some applications
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On Wed, 2 Feb 2005 14:30:13 +0000, Clive Menzies
<clive@clivemenzies.co.uk> wrote:
| Quote: | On (02/02/05 11:40), Carlos Ribeiro wrote:
Hi Clive,
I've found your post on the debian list, but I found no follow up to
it. I would like to know if you have more info about the problem. It
seems that we've ran in the same problem here with Ubuntu (a
Debian-based distro) & Open Office. Any information is valuable.
I found your original message at this location:
http://groups.google.com.br/groups?selm=3arlv-4Sm-13%40gated-at.bofh.it&output=gplain
Hi Carlos
Ah! That was a while ago and I gave up, reverting to nfs. Then about 3
weeks ago I took delivery of a new laptop and thought I'd try again.
Following spotting something about smbfs being deprecated in favour of
cifs, I installed the cifs kernel module (using modconf in debian) and mounted
the shares as cifs instead of smbfs. I did this last week and it's been
working fine since then.
|
Hi, I found some references about CIFS also later (after I sent that
message to you). I found the lack of documentation on CIFS absolutely
confusing. Almost all existing references talk about CIFS, the
"Microsoft Standard", and a few precious talk about moubt.cifs, the
Linux CIFS client. I still would greatly appreciate if you could send
to me more info, or pointers about it.
I also found intriguing another thing: with so many documents about
Samba as a server for a Windows environment, there's little literature
on the use of a Linux workstation with Samba. That would be
understandable if NFS were a little bit better, but considering how
bad and outdated NFS is... I thought more people would have tried a
client CIFS/SMB for Linux.
An example: please check your 'man mount', and see if cifs is
mentioned at all. I found that mount.cifs is included in my setup
(Ubuntu hoary, a debian based distro), but 'man mount' doesnt list it.
It also seem to be a little short on arguments, which is equally
weird. There's also little literature on the use of the mapping issues
in this scenario. I wish to solve it, but it`s being much harder than
I antecipated.
--
Carlos Ribeiro
Consultoria em Projetos
blog: http://rascunhosrotos.blogspot.com
blog: http://pythonnotes.blogspot.com
mail: carribeiro@gmail.com
mail: carribeiro@yahoo.com
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Ron Johnson
*nix forums Guru
Joined: 19 Feb 2005
Posts: 1190
|
| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
ReiserFS bugchecks on external drive (was Re: USB 2.0 Drive Reliability/Stability?)
|
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|
On Wed, 2005-02-02 at 13:12 -0200, Rogério Brito wrote:
| Quote: | On Feb 02 2005, Joerg Johannes wrote:
However, I just ordered a firewire/USB 2.0 combo Hard disk, I hope the
firewire thingy will work better.
Well, I have an HD enclosure (Pyro Dual Link Drive Kit DLX-185) with a
regular IDE HD inside of it. The enclosure has two connectors: one is a USB
2.0 and the other is a Firewire port.
I had problems getting filesystem corruption when I used it with the USB
port (at the time, I didn't have a Firewire card), with the SCSI layer
saying that the media was removed from the device (something quite weird
indeed, as it was in the middle of an rsync and I obviously didn't mess
with it when I was doing such copies).
It was reproducible, but I didn't have the opportunity of testing it
further and sending a proper bug report to the kernel mailing list.
Now that I have a vanilla Firewire card, I can use the same drive without
any problems. In fact, I'm using this drive with an HFS+ filesystem so that
I can easily share data between my Mac and Linux.
|
kernel-source-2.6.10
I've got an external USB2/Firewire enclosure with a 60GB drive.
When the drive was formatted reiserfs, it would always puke trying
to copy large amounts (10+GB) of data at the same time. This was
whether using tar or cp.
ext3 handles it fine, though.
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Steve Witt
*nix forums beginner
Joined: 01 Mar 2005
Posts: 10
|
| Posted: Sat Feb 19, 2005 6:30 pm Post subject:
Re: newbie Printing question
|
|
|
On Tue, 1 Feb 2005, Tom Connolly wrote:
| Quote: | Hello list,
I've just installed Sarge and apsfilter. I went through the setup
script and printed a very nice test page to a remote HP LaserJet 5
connected to a Windows 2003 Server machine. Now I'm stuck. Like I say,
I'm a newbie so I'm not sure how to print from my applications. Could
someone please help.
|
I don't use apsfilter myself, but do understand a little about printing. I
believe you must have installed a 'lower level' print manager/scheduler
such as cups or lprng. These programs do the work of submitting the print
jobs to the printer whether it be locally connected to the machine, or
remotely accessible over a network. You use the commands that this print
manager provides to actually print a document. Typically this would be
'lpr' or 'lp'. Read the man page on lpr/lp and also read the documentation
that comes with apsfilter.
Now, about printing from applications... Normally you produce a
printable document that is sent to your printer by the lpr
command. Postscript files (usually <filename>.ps) print directly
on the printer (if it is a postscript printer like your
Laserjet). Other file types, like ASCII text files can be printed directly
or can be converted to postscript with programs like 'a2ps', etc. and sent
directly to the printer. There are some applications, like OpenOffice,
that print directly to the printer like you are used to doing in
the Windows (if I can make the assumption that you come from that world
), and have a print command in their menu system somewhere. Another common
file format, Adobe Acrobat (pdf files), can be printed from a pdf viewer
application. I use 'xpdf', which, when you command it to print a file,
actually produces a postscript file that you then send to the printer
using lpr.
Hope this doesn't sound too complicated, but the Unix way is that there
are a lot of smaller programs that do one or two things, and are used by
other programs. So usually you are using a series of programs to
accomplish a task instead of one, big, monolithic one as in Windows.
Printing is a lot like that. There are programs produce a document,
programs that format the document or convert its format and programs that
send documents to the printer.
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