Linux-Hardware Digest #571, Volume #14 Thu, 5 Apr 01 09:13:09 EDT
Contents:
Re: Win Modems (Johan Kullstam)
ATAPI device hdd errors ([EMAIL PROTECTED])
LINUX FEVER magazine ... Check it out! (tom)
scsi NCR 53c7xx: VFS unable to mount root ("Oo.et.oO")
patching the kernel (Stuart)
Re: CD-R for backups (Norman Levin)
NOTE- he said the AMD 761 chipset! ([EMAIL PROTECTED])
Abit KT7A and Slackware (Mihai Lazarescu)
Re: VESA energy saver with a new 2.4.0 kernel? (Otto J. Makela)
Re: DLink DFE-530TX+ Revision Problems ("FreeManBe")
Re: Question: Anyone got ide2 *and* ide3 working on Promise ata100? (jazbo)
Kernel size and modules (Alberto Arribas)
Nic problem ("Alberto Tarantino")
3 com nic ("Harold E Vine III")
beeps ("Vlad")
Re: 3 com nic ("Barry L. Kline")
Re: Does the remote for Pinnacle PCTVpro work in Linux? ("Andy Walker")
Madge Smart 16/4 PCMCIA Token Ring Card ("Ian Ellis")
Re: 32MB I/O MagicVideo TNT2 AGP ("Andy Walker")
Re: Kernel size and modules (Steve Martin)
Re: Partition Strategy in a RAID-5 Setup: Newbie Question (bill davidsen)
Re: Switchboxes for keyboard, mice, video? ("John N. White")
Re: Partition Strategy in a RAID-5 Setup: Newbie Question (bill davidsen)
----------------------------------------------------------------------------
Subject: Re: Win Modems
From: Johan Kullstam <[EMAIL PROTECTED]>
Date: Thu, 05 Apr 2001 03:11:20 GMT
John Thompson <[EMAIL PROTECTED]> writes:
> Johan Kullstam wrote:
>
> > "LittleFish" <littlefish_au[SPAM ME AT YOUR OWN RISK]@yahoo.com> writes:
> >
> > > It seems as if more and more people using Windows
> > > are very dissapointed over the performance of there Lucent Winmodems. In the
> > > last week I have met 3 people that have taken back there Lucent Winmodem
> > > because it drops out regularly. If your machine is slower 300Mhz or is
> > > running a CPU intensive task in the background you can bet that it will drop
> > > out. Give me a real modem anyday!! By the way real internal modems are
> > > getting hard to source. Does anyone have suggestions for a Internal Fax
> > > Voice Data modem?
> >
> > one word _EXTERNAL_. yes, i know you said internal but why not expand
> > your possibilities? since most mice these days are ps/2 or usb, you
> > probably have nothing on your rs232 ports. why not use it?
>
> That option may also become limited as Microsoft pushes for their
> new PC hardware "standard" which includes no ISA slots, no serial
> ports and no parallel ports.
true, but how long did it take for ISA slots to disappear since the
introduction of the clearly superior PCI slot? PCI has been with us
for over 5 years and only just now are *some* (but not all)
motherboards being offered with only PCI and no ISA.
> MS sees the future in peripheral
> devices as USB and/or firewire and although it is conceivable
> that such devices might be made to work in linux it may be a
> while before they are fully supported in linux.
just like ISA lived long past its heyday, i think serial and parallel
ports will be with us for at least another 5 years. these things live
until they are pushed out and then some. for example, how many
printers with a parallel port vs USB interface are being offered
today? a laser printer might last a few years, i don't expect
parallel port to go away any time soon.
btw are there *any* desktop PC machines *today* without a
serial port?
furthermore, you can always add a PCI card to do serial and parallel
ports if it ever becomes an issue.
> Like it or not, MS has a great deal of clout in the hardware
> development arena.
yes, but there is nevertheless a great deal of inertia. i think you
raise a non-issue.
--
J o h a n K u l l s t a m
[[EMAIL PROTECTED]]
Don't Fear the Penguin!
------------------------------
From: [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
Subject: ATAPI device hdd errors
Date: Thu, 05 Apr 2001 03:22:01 GMT
Linux localhost.localdomain 2.2.17-14 #1 Mon Feb 5 14:57:25 EST 2001
i586 unknown
and also should mention that this problem has existed since installing
redhat 7.0 (had NT installed before 7.0)
[EMAIL PROTECTED] wrote:
>
> I have 2 cdroms in my system.
> one is working fine it is the first cdrom device.
> The second cdrom device is getting lots of these
> errors and filling up the log files. I have to
> kill syslogd as the errors occur rapidly and actually
> take up CPU.
>
> Anyone know how to fix this?
>
> Errors below:
>
> Apr 1 08:24:17 localhost kernel: ATAPI device hdd:
> Apr 1 08:24:17 localhost kernel: Error: Not ready -- (Sense key=0x02)
> Apr 1 08:24:17 localhost kernel: (reserved error code) -- (asc=0x3a,
> ascq=0x01)
> Apr 1 08:24:17 localhost kernel: The failed "Read Cd/Dvd Capacity"
> packet command was:
> Apr 1 08:24:17 localhost kernel: "25 00 00 00 00 00 00 00 00 00 00 00
> "
> Apr 1 08:24:17 localhost kernel: ATAPI device hdd:
> Apr 1 08:24:17 localhost kernel: Error: Not ready -- (Sense key=0x02)
> Apr 1 08:24:17 localhost kernel: (reserved error code) -- (asc=0x3a,
> ascq=0x01)
> Apr 1 08:24:17 localhost kernel: The failed "Prevent/Allow Medium
> Removal" packet command was:
------------------------------
Date: Wed, 04 Apr 2001 23:32:29 -0400
From: tom <[EMAIL PROTECTED]>
Subject: LINUX FEVER magazine ... Check it out!
http://linuxfever.hypermart.net
Become part of the FEVER today!
====== Posted via Newsfeeds.Com, Uncensored Usenet News ======
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
======= Over 80,000 Newsgroups = 16 Different Servers! ======
------------------------------
From: "Oo.et.oO" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.system
Subject: scsi NCR 53c7xx: VFS unable to mount root
Date: Thu, 05 Apr 2001 03:52:52 GMT
Hi-
i am pretty sure this question has been asked before but i'll be damned
if i can find an answer with a solution.
I recently obtained a DEC Celebris XL 5166DP. It rocks pretty solid.
except for the fact that i don't have both processors going because i
can't build a kernel that boots. The slackware 7.1 scsi kernel works
just fine.
it tries the sim710 driver first and says it can't find any 710 devices.
it then uses the ncr53c7xx,8xx driver and reports an 810. but it's a 710!
but it works (as far as my scsi sub-system goes)
but when i build my kernel (SMP of course) with scsi and scsi disks, and
ncr53c7xx built into the kernel it panics
because it can't mount the root partion on /dev/sda1
which is DEFINITELY where / is. and i've tried passing root=/dev/sda1
with lilo as here:
append = "root=/dev/sda1"
do i need to remove the standard root= thing for lilo to pass when i use
the kernel parameter? i'm pretty sure i've tried that too.
does anyone have a solution for this? i've tried the sim710 with no
success, and the ncr one above and the one for the 8xx alone.
please help me!
i have two disks on there, and a cdrom
any information at all is a great help, please email me if possible-
thanks in advance-
eric
------------------------------
From: Stuart <[EMAIL PROTECTED]>
Subject: patching the kernel
Date: Wed, 4 Apr 2001 23:23:55 -0400
hey
when i run the command to patch a kernel I get the question what file to
patch? what do i say here
kernel 2.4.3
------------------------------
Date: Wed, 04 Apr 2001 01:03:02 -0500
From: Norman Levin <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
Subject: Re: CD-R for backups
[EMAIL PROTECTED] wrote:
>
> Norman Levin <[EMAIL PROTECTED]> wrote:
> > [EMAIL PROTECTED] wrote:
> >>
> >> "Johannes B. Ullrich" wrote:
> >> >
> >> > Hi.
> >> >
> >> > I am looking for good linux backup software that supports CD-R drives.
> >> > Any recommendations?
> >>
> >> webmin!
> > ** on a separate note, I down loaded webmin and it seems like a tool with
> > potential. I also downloaded some of the additional modules. They are all
> > in a tarball format and the directorys do NOT seem to be relative to /.
> > I could explore, but am I missing some documentation? Where should I be
> > (I'm talking about directorys - I've had lots of people tell me where to go)
> > when I eXtract the tar ball?
>
> Great program - I'll second that. To unpack the tarball, use the install
> option in Webmin itself... Under the first menu and then Webmin Config.
> Then webmin modules, and you should have the option to install modules.
** THANX. Ill try that.
> Kris
--
Norman Levin
"In 1555, Nostradamus wrote: 'Come the millennium, month 12, in the home of
greatest power, the village idiot will come forth to be acclaimed the
leader.'"
------------------------------
From: [EMAIL PROTECTED]
Subject: NOTE- he said the AMD 761 chipset!
Date: Thu, 05 Apr 2001 05:27:07 GMT
On Wed, 04 Apr 2001 18:01:51 +0200, jpajirent <[EMAIL PROTECTED]>
wrote:
There is no doubt that the family of Althon CPU's work fine, what is
at issue here is the new AMD 761 chipset and the DDR ram. Firstly,
where can you even buy the mobo's for these- I haven't been able to
find one (most vendors have April as delivery date), and secondly,
what little I've gleaned from forums like this one is that the new
chipset is not currently a smooth install.
More advice on this aspect of his question is really the heart of the
matter and would be welcome!
>On Thu, 29 Mar 2001 16:53:11 -0700, Allen Blackburn
><[EMAIL PROTECTED]> wrote:
>
>>Hi there:
>>
>>I'm really new to Linux (but not Unix), and I'm gearing up to set up my
>>own PC with Linux. I was thinking about buying a new 1.1 GHz AMD 761
>>Athlon chip with 266 MHz bus, with a Gigabyte GA7DX motherboard. I also
>>wanted to load SuSe 7.1. However, these hardware choices are not on
>>their website in their hardware compatiblity list. My questions are: Is
>>it a bad idea to go ahead and try to make it work, or would anyone out
>>there recommend a different set of hardware and/or Linux distribution?
>>
>>Thank you very much in advance!
>
>Athlon won't be a problem. The problem may come from the other
>extension cards...
>On my system, I had no problem since Suse 7.0 which works fine with
>all my hardware, except my Elsa Gladiac II MX. But with Suse 7.1, I
>had much much more problems. Mandrake 7.2 is the sole distro which
>install without any problem and which support all my hardware (even
>the Elsa Gladiac II MX videocard and Tekram DC395 scsi card)
>
>The best thing to do is to download the eval iso and get a try !!!
------------------------------
From: Mihai Lazarescu <[EMAIL PROTECTED]>
Subject: Abit KT7A and Slackware
Date: Thu, 05 Apr 2001 14:24:40 +0800
Hello,
I am in the process of upgrading my computer and I would like to
know how well Slackware
runs on an Abit KT7A (Via 686 chip). Am I likely to run into troubles?
What other motherboard
would you recommend if the Abit KT7A is not well supported?
Thanks in advance for your help.
Mihai
------------------------------
Crossposted-To: sfnet.atk.linux
Subject: Re: VESA energy saver with a new 2.4.0 kernel?
From: [EMAIL PROTECTED] (Otto J. Makela)
Date: Thu, 05 Apr 2001 07:42:52 GMT
Kyle Keys <[EMAIL PROTECTED]> writes:
> "Otto J. Makela" wrote:
> > I assume the whole logic behind the VESA energy saving system has
> > changed, or something, because the settings in XF86Config-4 which
> > worked well with a older kernel no longer (with a hand-compiled 2.4.0)
> > switch my monitor to energy saving from the gdm login screen, nor does
> > the Gnome screen saver ever switch over to energy saving mode though
> > it has been set to do so. This is a RH7.0 system with XFree86 4.0.1,
> > the old kernel was the 2.2.16-22 that came with the system.
>
> I had to set several DPMS options in /etc/X11/XF86Config to get mine
> to work...
>
> Section "Monitor"
> Identifier "Monitor0"
> VendorName "Hewlett Packard"
> ModelName "UltraVGA 1280"
> HorizSync 20-90
> VertRefresh 70-80
> Option "DPMS"
> EndSection
>
> Section "ServerFlags"
> Option "StandbyTime" "5"
> Option "SuspendTime" "10"
> Option "OffTime" "30"
> EndSection
I already had all this in the XF86Config-4, as I said in my message.
Turns out that the whole thing works fine with kernel-2.4.2, though
I cannot yet seem to get /sbin/poweroff to switch the power supply off.
Suggestions, anyone?
--
/* * * Otto J. Makela <[EMAIL PROTECTED]> * * * * * * * * * * * * * * * */
/* Phone: +358 40 765 5772, FAX: +358 42 7655772, ICBM: 60N 25E */
/* Mail: Mechelininkatu 26 B 27, FIN-00100 Helsinki, FINLAND */
/* * * Computers Rule 01001111 01001011 * * * * * * * * * * * * */
------------------------------
From: "FreeManBe" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.networking
Subject: Re: DLink DFE-530TX+ Revision Problems
Date: Thu, 5 Apr 2001 10:38:24 +0200
After i fried some bits of 2 of those damn dlink cards (they wouldnt get
recognised) i decided to purshase cheaper rtl8139 and my system is just
working great.
<[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED]...
> I'm trying to use DLink DEF-530TX+ NIC but no success. At boot time
> the card does not seem to be recogized. Now the strange thing of it all
> is that I previouly had the same model of card working on the same
> hardware a few months ago. In fact I pulled it out and have been I
> testing it along side the new card and found it still works. Now the
> working card is label, DFE-530TX+ Rev.A1, and the newer ( non-working )
> card is labeled DFE-530TX+ Rev. D1. So I've got two differenct versions
> of the NIC...one works, one doesn't. I've notice the non-working card
> does not seem to be recognize at boot time unlike the working card which
> is. There does not appear to be anything wrong hardware wise with the
> NICs as both of them work under Windows 98 and 2000.
>
> With the working card I had to turn off PNP OS in the BIOS before it
> would work. Of course I've done this the new card as well but no
> success. As well, I've updated to the latest rtl8139.c file ( 1.13 )
> but still no success.
>
> Has anyone run into this problem??? Better yet anyone soved it?
>
> The hardware is an Intel PIII 550 on an ASUS P3B-F motherboard. The OS
> is SUSE 6.4, kernel 2.2.14.
>
> Mark Lightfoot
>
>
>
------------------------------
From: jazbo <[EMAIL PROTECTED]>
Subject: Re: Question: Anyone got ide2 *and* ide3 working on Promise ata100?
Date: Thu, 05 Apr 2001 04:40:00 -0400
Nader wrote:
> You may want to try kernel 2.4.2. There have been many improvements to the ide
> code since 2.2.x.
>
> It's not too much effort and you can always go back to your current kernel (as
> long as you save it).
>
> jazbo wrote:
>
> > Nader wrote:
> >
> > > What kernel version are you using?
> > >
> > > If the kernel doesn't support HPT366, then you'll have to
> > > pass ide parameters to the kernel during installation. See this web site
> > > for more info and details on how to determine the parameters and how to
> > > pass them: http://linux.nf/stepbystep.htm - select the ULTRA-66 Step by
> > > Step
> > > guide. After you get your system running and stable, you can put the
> > > parameters in LILO so you don't have to type them each time you boot.
> > > Alternatively, you can upgrade to the 2.4.2 kernel which can be
> > > configured to support HPT366 directly.
> >
> > Actually I was hoping that someone could confirm that they have *seen* both
> > channels in use under Linux.
> >
Thanks for the prod.
That's what it took. I compiled 2.4.3 and the second channel now may be accessed.
Apparently according to Andre Hedrick's linux-ide page, he's not backporting stuff
to 2.2 anymore. Unfortunately under my 2.4.3 kernel the drive speed isn't quite as
quick as what hdparm showed me under 2.2. :-\
Think I'll have to invest in a 3ware raid controller - doing simultaneous tests of
hde and hdg shows a serious slagging of read and write performance. disk reads
fall below 50% of their normal speed observed with one drive connected to the card
under linux 2.2.
Software RAID 0 on one Promise Ultra 100 is definitely "a fool's paradise".
------------------------------
From: Alberto Arribas <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.setup
Subject: Kernel size and modules
Date: Thu, 05 Apr 2001 10:51:36 +0200
Hello!
Thanks a lot for your e-mails the last week. I have been able to reduce
my kernel from 1800 Kb to 925 Kb, but, unfortunately, it is not small
enough. I know that less than 810 Kb would be OK, because my old kernel
has this size. Following your recomendation I run make mrproper, make
xconfig, make dep, make clean, make bzImage, make modules and make
modules_install. Then I rename properly the kernel and run lilo.
Everytime I get "Kernel is too big". xconfig is a great tool, but I have
removed or changed to module all the components except the really
needed.
Can I reduce the size of the kernel in other way?
Can I increase the allowed size of the kernel?
Thanks,
Al
------------------------------
From: "Alberto Tarantino" <[EMAIL PROTECTED]>
Subject: Nic problem
Date: Thu, 5 Apr 2001 11:57:56 +0200
Hello,
I changed the NIC on a HP server and since then I got this message in the
/var/log/warn file:
Mar 28 00:04:22 xxxxxxx kernel: enable_irq() unbalanced from c01c6334
The NIC works fine and the system is quite stable...
The kernel is 2.2.18 and the NIC is a 3com XL 3c509c on PCI bus.
Thanks for any advice.
Alberto
------------------------------
From: "Harold E Vine III" <[EMAIL PROTECTED]>
Subject: 3 com nic
Date: Thu, 05 Apr 2001 10:34:18 GMT
I have a cable connection, trying to get my nic to work under linux. Its a
3com 509 isa pnp card. works fine under windows, but even using the io
addresses that windows shows, linux cannot load the card I'm kinda stuck
cause I cant seem to get it to work. Is there a trick to this i don't know
about? ...
thanks much.
------------------------------
From: "Vlad" <[EMAIL PROTECTED]>
Subject: beeps
Date: Thu, 5 Apr 2001 12:58:35 +0200
Hello all!
Where on earth do i switch off these irritating system beeps, like when i
backspace too far, or do something similar. These speaker beeps drive me
nuts!
Thanks!
------------------------------
From: "Barry L. Kline" <[EMAIL PROTECTED]>
Subject: Re: 3 com nic
Date: Thu, 05 Apr 2001 07:58:45 -0400
Harold E Vine III wrote:
>
> I have a cable connection, trying to get my nic to work under linux. Its a
> 3com 509 isa pnp card. works fine under windows, but even using the io
> addresses that windows shows, linux cannot load the card I'm kinda stuck
> cause I cant seem to get it to work. Is there a trick to this i don't know
> about? ...
>
> thanks much.
Two choices:
1) Download the configuration program from 3com and configure the card
with hard-coded addresses, eliminating PNP
2) ISAPNP utility
Barry
------------------------------
From: "Andy Walker" <[EMAIL PROTECTED]>
Subject: Re: Does the remote for Pinnacle PCTVpro work in Linux?
Date: Thu, 5 Apr 2001 13:21:40 -0000
Lars Luthman wrote in message <[EMAIL PROTECTED]>...
>Does it?
>
>
>--ll
Christ, I'd be glad just to get the picture going!
Have you managed to get that far, because if you have I'd love to know how!
------------------------------
From: "Ian Ellis" <[EMAIL PROTECTED]>
Subject: Madge Smart 16/4 PCMCIA Token Ring Card
Date: Thu, 5 Apr 2001 13:23:30 +0100
Hi,
I've got a Madge Smart 16/4 PCMCIA Token Ring Card, but I can't get it to
work under Linux kernel 2.2.16 or 2.2.5.
I've downloaded the binary and source code drivers from www.madge.com, but
they just don't click. My kernels are compiled with Token Ring enabled. I
load the mtok.o module first with parameter pcmcia=1. I've edited the
/etc/pcmcia/config file so that it loads mtok_cs.o when the Madge card is
started. This module loads OK, no messages, but device TR0 does not appear.
I've checked /proc/net/dev and there are no new devices, and an lsmod shows
that mtok_cs. is unused.
This means that either the driver is wrong, or I'm going about loading them
incorrectly.
Anyone got any ideas?
Cheers
Ian
------------------------------
From: "Andy Walker" <[EMAIL PROTECTED]>
Subject: Re: 32MB I/O MagicVideo TNT2 AGP
Date: Thu, 5 Apr 2001 13:27:17 -0000
lobotomy wrote in message ...
>A TNT2 is a TNT2. Just get XFree86 4.0.x and the latest nVidia driver
>and you should be set.
>
>In article <UPFy6.6018$[EMAIL PROTECTED]>, "Young4ert"
><[EMAIL PROTECTED]> wrote:
>
>> Hi,
>>
>> I just purchased an I/OMagic 32MB TNT2 2/3D Video Graphics Accelerator
>> AGP (Part #:DR-DA600) card and am wondering if this card is ully
>> supported under Linux. On the box, it has an nVIDIA logo. I certainly
>> would like to hear from anyone who is using this card under Linux in
>> term of 3D performance and acceleration.
>>
>> TIA.
>>
>
>
>--
>PC Chips actually goes by many names. PCChips = Ability = Alton = Amptron =
>Aristo = Asia Gate = Asiatech = Assa = Atrend = Elpina = Eurone = Fugu =
>Fugutech = Hi Sing = Houston = Hsing Tech = H Tech = Matsonic = Minstaple =
>PCWare = Pine = Protac = QDI = Warpspeed
I have a TNT2 based card and Mandrake7.2 and RedHat6.2 detect it and set it
up perfectly as a display device. Mandrake even sets up with 3D acceleration
working quite well but I'd wait a while until a distribution is available
with XFree86 4.0.2 and kernel 2.4 if you want a stable system and better
support.
------------------------------
From: Steve Martin <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
Crossposted-To: comp.os.linux.setup
Subject: Re: Kernel size and modules
Date: Thu, 05 Apr 2001 07:35:57 -0400
Alberto Arribas wrote:
> has this size. Following your recomendation I run make mrproper, make
> xconfig, make dep, make clean, make bzImage, make modules and make
> modules_install. Then I rename properly the kernel and run lilo.
> Everytime I get "Kernel is too big".
Okay, stupid question time... did you in fact *move* the bzImage
file to where /etc/lilo.conf says it should be? If not, then
you're just booting the same wrong kernel over and over again.
Other than that, I can't figure what's wrong.. anyone out there
with an idea?
------------------------------
From: [EMAIL PROTECTED] (bill davidsen)
Crossposted-To: comp.os.linux.admin,comp.os.linux.networking,comp.unix.admin
Subject: Re: Partition Strategy in a RAID-5 Setup: Newbie Question
Date: 5 Apr 2001 12:33:47 GMT
In article <99lhns$1oju$[EMAIL PROTECTED]>,
Jimi Thompson <[EMAIL PROTECTED]> wrote:
| If you have shucked out the money for a hardware RAID, you should probably
| make use of it. RAID 5 and RAID 1 are really the only 2 contenders for real
| world use. RAID 1 = mirroring and RAID 5 = data striping with a CRC-like
| check.
I don't think you understand what RAID levels do... there are several
other commonly used and useful configurations.
RAID-0 is striping, and provides a significant increase in
performance in most cases, due to spreading seeks and transfer rates
over multiple drives. It allows use of all the disk space for data. It
does *not* provide redundancy, and because the failure of any one drive
will cause loss of all data, it should not be used for critical
operations. But it is most definitely faster than RAID-5.
RAID-1 mirroring tends to be slightly slower than a native drive in
write, but offers redundancy in case of a drive failure. The important
use when data is "read-mostly" is that when one drive is busy, data may
be read off the other. Note that many cheap hardware controllers *don't
do this*, they read one drive and only go to the other if the first
drive fails. Note also that mirroring is not limited to a single copy
of the data, systems with very heavy read loads can benefit from having
more than a single copy of the data. Linux and AIX support this at the
o/s level.
Software RAID, at least the Linux version, often outperforms harware
RAID, because the o/s can make good use of mirrored copies, queueing of
i/o requests, etc. Hardware RAID looks like a single drive, and the
things Linux (or any o/s) do to optimize access to a single large drive
may actually hurt performance on a hardware RAID.
Finally, RAID-0+1 is mirroring between two striped volumes. This gives
an advantage in both performance and reliability.
I haven't seen RAID-[234] used in years. I believe they really are not
useful in the real world, and perhaps never were.
--
bill davidsen <[EMAIL PROTECTED]> CTO, TMR Associates, Inc
At LinuxExpo Sun was showing Linux applications running on Solaris.
They don't get it, the arrow points the other way. There's a reason why
there's no SolarisExpo, Solaris is a tool; Linux is a philosophy, a
religion, a way of life, and only incidentally an operating system.
------------------------------
From: "John N. White" <[EMAIL PROTECTED]>
Crossposted-To: comp.sys.ibm.pc.hardware.chips
Subject: Re: Switchboxes for keyboard, mice, video?
Date: Thu, 5 Apr 2001 08:41:53 -0400
"George Macdonald" <fammacd=!SPAM^[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]...
> I've seen this "warble" (I'd say wobble) in one 2nd floor corner of our
> office and it seems to vary with monitor brand and vertical sync frequency
> - the video card used doesn't seem to matter. This is a small office
> building and the main power cable is routed along the outside top of that
> corner of the wall before it goes down to the ground and into the basement.
> The effect is worst when the A/C is running - IOW large draw on the main
> power - and you can see it worsen as an A/C compressor kicks in.
>
> I'm not sure if the effect is caused by the the pulsing field around the
> main power cable affecting the monitor circuits directly or if it's carried
> into the monitor through its power or signal cables but there doesn't seem
> to be a cure and the "quality" of the monitor doesn't seem to make a
> difference. I found that a 17" Mitsubishi monitor was badly affected but
> in the same position a 17" Viewsonic show no effects at all... and yet
> another 17" Viewsonic (same model) nearby is moderately disturbed.
> Sometimes you just have to admit: "this is out of my control".:-)
Such "warbles" are usually caused by time varying magnetic fields
acting directly on the electron beam in the CRT. A good way to
check for this is to change the orientation of the monitor. For
instance, if the warble is a vertical movement, and the monitor
is placed on it's side, then a magnetically induced warble would
still be vertical to the outside world, meaning it would now be
horizontal to the monitor's frame of reference.
Getting that much interference from a power line sometimes
means there is a fault in the wiring. Normally, current
flowing in the various wires in a power line exactly cancel,
and stray magnetic fields drop to zero at distances large
compared to the spacing between the wires. If there is
(for instance) a ground loop, and a lot of current is flowing
through that alternate ground path, then the power line will
generate a magnetic field that drops off approximately linearly
with distance (doubling the distance means half the field strength).
------------------------------
From: [EMAIL PROTECTED] (bill davidsen)
Crossposted-To: comp.os.linux.admin,comp.os.linux.networking,comp.unix.admin
Subject: Re: Partition Strategy in a RAID-5 Setup: Newbie Question
Date: 5 Apr 2001 12:44:30 GMT
In article <0i6v6.450710$[EMAIL PROTECTED]>,
NM <[EMAIL PROTECTED]> wrote:
| I'm setting up RAID-5 on Dell PowerEdge 2400 server with PERC 2/Si RAID
| controller and 3 32GB each SCSI disks. Dell has preconfigured two
| containers:
| #0: 4GB (boot)
| #1: 60 GB
|
| All three disks are part of both containers. I am planning to install RedHat
| 7 and create the folllwing partitions:
| /, /boot, and swap in container #1 and install OS there.
| /home/data partition of 60 GB in container #2.
|
| My questions: Is 60 GB partition too large?
No.
| I really want one large
| partition. This partion will hold all user data (It's a fileserver). I know
| a few drawbacks of having single large partition as opposed to having
| mulitple smaller partitions:
| - Longer fsck times assuming no journaling filesystem (don't care)
| - More prone to corruption due to one large i-node table (maybe not valid in
| RAID-5?)
As long as you have reliable power and shutdown clean, you are
unlikely to get a problem. I have systems up for 300-400 days with no
problems, other than boot takes forever because fsck insists on checking
after some number of weeks.
| - Less convenient for tape backup (don't use dump for backup.: so don't
| care)
I don't see this, dump in particular has good facilities for
multi-media backups. And you can do incremental backups easily as well.
You might buy a hot-swap bay and just back up to a single hard drive,
you can get a 60GB drive for ~$250, and treat it as a very fast tape!
Note, you need kernel support for this, tapes just work, but are small.
| - Any other reason I should have smaller partitions?
|
| BTW, what is the biggest partition you folks have ever handled? And for
| what?
I usually use 200-300GB partitions for usenet. I break it into small
file of 20 or 100GB each (2.4 kernel).
| Also I would like to have some pointers in learning more about disaster
| recovery of RAID systems. Please feel free to share your experiences in
| dealing with DELL Support in such incidences.
Never had a disaster, so I can't say. Once in a while a drive fails, I
pull the bad one and plug in a good one.
--
bill davidsen <[EMAIL PROTECTED]> CTO, TMR Associates, Inc
At LinuxExpo Sun was showing Linux applications running on Solaris.
They don't get it, the arrow points the other way. There's a reason why
there's no SolarisExpo, Solaris is a tool; Linux is a philosophy, a
religion, a way of life, and only incidentally an operating system.
------------------------------
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