Linux-Hardware Digest #4, Volume #13 Thu, 8 Jun 00 08:13:06 EDT
Contents:
Re: Sound Card IRQ Conflict? (Ken)
Re: How to configure modem? ("Olli")
Re: IRQ Steering under Linux
VIA Apollo 133A chipset & CT 5880 sound ("Sasa Janiska")
S3 Savage 2000, ATI Rage 128GL or Matrox G400 ("Sasa Janiska")
Celeron or PIII? ("Sasa Janiska")
Re: Heads, et al...Confused in NF, Canada...*smile* (Hendrix)
Multi session problems (William Buchanan)
Re: film scanner, w scsi supported on LINUX? (Juha Helminen)
mustek scanner doesnt work (Tobi)
IDE or SCSI for /home (Guy De Pauw)
lemark 1100 (nospam/?@?!$�)
Re: Compaq Prosignia 486 w/amd 586 overdrive and Redhat - too slow Help! (Gereon
Wenzel)
Re: minimal hardware for mp3 decoding (Gereon Wenzel)
Re: need dual scsi2 card advice (Gereon Wenzel)
USB HP8210e CD Burner (=?iso-8859-1?Q?Ga=EBl?= HAMON)
Token Ring Adapter (=?iso-8859-1?Q?S=E9bastien?= Cottalorda)
Re: S3 Savage 2000, ATI Rage 128GL or Matrox G400 (Flukezero)
Re: SAN/Fibre Channel/Brocade Switches/Compaq Storageworks (Detlef Gossrau)
LILO, FreeBSD, and >1024th Cylinder ("Greg H.")
How to access the CD-rom on channel B of a scsi card? ("coleung")
Re: Token Ring Adapter (Tobi)
scsi interface doesnt work (Tobi)
Hauppage s-video pinout?... (Max Lock)
Re: Heads, et al...Confused in NF, Canada...*smile* (The Sokos Family)
Re: Heads, et al...Confused in NF, Canada...*smile* ("T Bluck.")
----------------------------------------------------------------------------
From: [EMAIL PROTECTED] (Ken)
Crossposted-To:
alt.linux,alt.os.linux,aus.computers.linux,linux.redhat,linux.redhat.install
Subject: Re: Sound Card IRQ Conflict?
Date: Thu, 08 Jun 2000 07:31:53 GMT
On Thu, 1 Jun 2000 14:16:31 +1000, "David Kennedy"
<[EMAIL PROTECTED]> wrote:
>I am having problems getting my sound card to work. Its a PnP ISA CMI8330,
>pretty standard, but getting it to work under LINUX (RH6.2) is a problem.
I've not tried it yet, but there are explicit instructions given in a
patch for this soundchip at
http://astr17pi.difi.unipi.it/v2.2/patch-2.2.10/linux_Documentation_sound_CMI8330.html
My soundcard is on the motherboard and I'd rather try to get it going
than buy and fit an extra card. RH's sndconfig was able to give me a
way too fast version of the standard voice test file, but absolutely
nothing for the midi file.
I hope to get around to trying the patch this weekend... assignment
rewrites permitting.
See ya,
Ken
------------------------------
From: "Olli" <[EMAIL PROTECTED]>
Crossposted-To: alt.os.linux.dial-up
Subject: Re: How to configure modem?
Date: Thu, 08 Jun 2000 07:29:22 GMT
Mahmood Ahmed wrote in message <8hhtvt$nmj$[EMAIL PROTECTED]>...
>Hi
>
>I am using U.S. Robotics 56K Voice Win modem (internal). Is there any way
to
>configure it in Linux (RedHat 6.1)?
>
>Thanks for any help.
>
>Mahmood
>
It depends of the model, see http://www.o2.net/~gromitkc/20000604a.html
------------------------------
From: <[EMAIL PROTECTED]>
Subject: Re: IRQ Steering under Linux
Date: Thu, 08 Jun 2000 07:30:07 GMT
Controllers in the sense of peripheral controllers, I have two (in fact
many more devices on the bus upto 00:0c.1)
Thanks
Edward Lee wrote:
>
> How can you have two PCI controllers on the motherboard? Do you mean
two PCI
> devices? Is IRQ steering same as sharing IRQs? Sorry about my limited
> hardware background. I have this board and some of the lan, sound and
modem
> devices are definitely sharing IRQs.
>
> [EMAIL PROTECTED] wrote:
>
> > I have two embedded PCI controllers on my motherboard which use the
same
> > IRQ. Under W98 and WNT these controllers work fine 'cos of the IRQ
steering
> > capability. But under Linux only one controller can be active at any
time.
> > Is there an equivalent function to IRQ steering available for Linux.
> > Spec is Redhat 6, Kernel 2.2-15, Motherboard is PCChips M599LMR
> >
> > Thanks
> > Peter
>
--
Posted via CNET Help.com
http://www.help.com/
------------------------------
From: "Sasa Janiska" <[EMAIL PROTECTED]>
Subject: VIA Apollo 133A chipset & CT 5880 sound
Date: Thu, 08 Jun 2000 08:45:59 +0200 (EET)
Reply-To: "Sasa Janiska" <[EMAIL PROTECTED]>
Hello!
I'm going to buy new system to run exclusively on Linux.
I plan to buy Celeron 566 on PIII motherboard (FIC KA11) which uses VIA
Apollo 133A chipset and has onboard audio Creative 5880 chip.
I have seen some discussion regarding Intel vs. Apollo chipsets, but I'd like
to get some more recent experiences and especially some advice regarding
onboard audio.
Is the motherboard ready for Linux?
Sincerely,
Sasa
------------------------------
From: "Sasa Janiska" <[EMAIL PROTECTED]>
Subject: S3 Savage 2000, ATI Rage 128GL or Matrox G400
Date: Thu, 08 Jun 2000 08:51:44 +0200 (EET)
Reply-To: "Sasa Janiska" <[EMAIL PROTECTED]>
I need advice which graphic card to pick for use on Linux.
I don't need card for games, its use is primarily for text processing and I
need good video output for DVD.
I cannot decide between: Diamond Viper II Savage 2000 (32MB), ATI All in
Wonder 128GL (32MB) and Matrox G400 AGP Dual Head (32MB).
Which card has good support for Linux (XFree) and good quality of video
output?
Sincerely,
Sasa
------------------------------
From: "Sasa Janiska" <[EMAIL PROTECTED]>
Subject: Celeron or PIII?
Date: Thu, 08 Jun 2000 09:26:33 +0200 (EET)
Reply-To: "Sasa Janiska" <[EMAIL PROTECTED]>
Hello!
I am planning to buy a new PC for use under Linux.
Because of low budget I'm interested if it is wise to invest in more MBs of
RAM memory (128 instead of 64) and buy Celeron (566MHz) instead of PIII
(550MHz)?
I use computer primarily for text processing and database applications.
Is it Celeron 566 powerful enough to run DVD movies?
Sincerely,
Sasa
------------------------------
From: Hendrix <[EMAIL PROTECTED]>
Crossposted-To:
comp.sys.ibm.pc.hardware.storage,alt.comp.hardware,alt.comp.hardware.homebuilt,alt.comp.hardware.homedesigned,alt.comp.hardware.pc-homebuilt
Subject: Re: Heads, et al...Confused in NF, Canada...*smile*
Date: Thu, 08 Jun 2000 05:09:49 -0230
Hendrix wrote:
>
> Hi guys,
>
> Until recently, I understood two meanings of the word "head" in
> conjunction with a hard drive... One understanding of mine was that the
> word "head" referred to the read/write head that is used to read/write
> data from a particular side of a platter. Another understanding I had
> was that a single side of a platter was referred to as a head. Thus, a
> hard drive with 4 platters would have 8 heads (ex: 4 platters x 2
> sides/platter = 8). Whether you're counting read/write heads, or sides
> of a platter, you will still come up with 8 heads...
>
> Does this sound right...??? It sounds right to me...EXCEPT...I have a
> hard drive here that I know has only 2 platters, but yet it is rated as
> having 16 heads... It is a 2.57GB Fujitsu that is rated as having a
> geometry of 4982Cyl 16Hds 63Sec/Trk....!!! And if my previous
> calculations are correct, the head count would yield 8 platters...
>
> Also, I have another misunderstanding regarding this calculating
> procedure... For instance, if the number of cylinders on a drive is
> equal to the number of tracks on each side of a platter then (Cylinders
> x (Number of Sides) would equal the number of tracks that are on the
> disk... Now, if I have the number of tracks on a disk, then all I would
> have to do to calculate the size of the drive would be to take the
> sectors/track information, multiple it by 512, and then multiple it
> again by the number of tracks on the disk... Logically this should
> yield the amount of space on the drive. But it doesn't...
>
> Consider the following:
> (Fujitsu 2.57GB with 2 platters)
>
> C=4982 H=16 S=63 BPS=512
> SizeOfDrive = C x H x S x BPS
> = 4982 x 16 x 63 x 512
> = 2571190272
>
> This is correct... But consider the following (which would logically be
> the same):
> (Still using the 2.57GB Fujitsu with 2 platters)
>
> C=4982 H=16 S=63 BPS=512
> NumberOfTracks = C x NumberOfPlatters x 2 (There are 2 sides to every
> platter)
> = 4982 x 4
> = 19928
> SizeOfDrive = NumberOfTracks x S x BPS
> = 19928 x 63 x 512
> = 642797568
>
> So my question is... Why are these calculations coming out differently
> if their respective meanings and translations are the same
> throughout... The only thing I can think of is that I am
> misunderstanding the meaning of a head... If a head is supposed to
> represent a platter surface, or a magnetic reading and writing device,
> then there is no way in hades that there are 16 heads on a 2 platter
> drive...*smile*
>
>
The confusion still continues with the older drive that I have here...
I have a 177MB drive with the following specs C = 903 H = 8 S = 46...
Why is it saying that there are 8 heads when I know there are only 2
platters....??? Logical assignments shouldn't even come into play when
the drive was first made in the early 1990's with 177MB of storage...
It should be easy to convert cylinders to tracks just by multiplying
cylinders by the number of surfaces on the drive... But this doesn't
work.... Hmmm...
Thanks guys....
--
Trevor Penney,
A+, Network+ Certified
------------------------------
Date: Thu, 08 Jun 2000 18:04:38 +0930
From: William Buchanan <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.misc,comp.os.linux.setup
Subject: Multi session problems
Hi,
I am running an Aopen 9624 ide burner(re-badged ricoh) with
SCSI
emulation, and am suffering from wierd inconsistencies
regarding
multisession cd's. Sometimes it will read them properly,
sometimes it
will only read the first session. At one stage it was
burning multi, but
not reading its own burns properly!
A reboot will fix this everytime, but a couple of days
later it just
stops reading multi again. Its in a server, so I cant
reboot the machine
that often. This morning it read a multi session cd fine.
A few hours later, after some burns, it read only the first
session on
the same cd.
Any advice would be greatly appreciated.
thanks
Bill
------------------------------
From: Juha Helminen <[EMAIL PROTECTED]>
Crossposted-To: comp.periphs.scanners
Subject: Re: film scanner, w scsi supported on LINUX?
Date: Thu, 08 Jun 2000 11:42:43 +0300
Paul Elliott wrote:
> Is there a film negative/slide scanner that works with scsi
> and is works under LINUX?
>
> Where are some URLs that review film/slide scanners?
What about http://www.hamrick.com/vsm.html ?
You will find quite many scanners.
Juha
------------------------------
From: Tobi <[EMAIL PROTECTED]>
Subject: mustek scanner doesnt work
Date: Thu, 08 Jun 2000 10:42:14 +0200
hi
i want to install my mustek scanner which
is a MFS-6000SP. But the scsi-adapter comin
with it isnt recognized by linux, if i use
the generic scsi-support (sg0-9).
i want to use sane, and if i run find-scanner,
there isnt printed anything on my screen.
i think even the scsi-card isnt found.
Does anyone know what to do (i think i chose
an unused scsi-id and io-address)?
thank you tobi
------------------------------
From: Guy De Pauw <[EMAIL PROTECTED]>
Subject: IDE or SCSI for /home
Date: Thu, 08 Jun 2000 11:05:50 +0200
Hi!
We want to buy a new big hard drive for one of our (Dual PII) servers.
The new hard drive is supposed to function as the new /home partition on
which everybody (about 10 people) can put their files. Having one big
/home for everybody will also facilitate backups and the like.
I know SCSI is better in many ways, but also way more expensive. Would
an IDE-drive be a good solution or will it slow everything down? There
would not have to be any swapping on this drive or anything, just plain
old reading and writing, but some of the processes we run (Machine
Learning of natural language) or very data-intensive.
Thanks!
Guy
------------------------------
From: nospam/?@?!$�
Subject: lemark 1100
Date: Thu, 08 Jun 2000 10:18:58 +0100
hI,
As anyone got this printer to work with linux.
if so, How(Could ypu please tell me)
thanks in advance
mike
------------------------------
From: Gereon Wenzel <[EMAIL PROTECTED]>
Subject: Re: Compaq Prosignia 486 w/amd 586 overdrive and Redhat - too slow Help!
Date: Thu, 08 Jun 2000 11:35:17 +0200
I'm using Prosignia with AMD 486/133 and power converter Socket,
Speed is O.K. (don't have the Bogomips rigth now)
though System Configuration detects 33MHz only.
Did you get the onboard NCR 53C710 SCSI working with Linux?
If so how to do it, I tried the sim710 driver but failed.
Gereon Wenzel
probebot schrieb:
>
> Redhat zoot posts message that it is running on a i486 at login.
>
> I am getting about 3 bogomips out of this system.
>
> Any help for increasing the of the system (diag disk shows the cpu running
> at 133 mhz).
------------------------------
From: Gereon Wenzel <[EMAIL PROTECTED]>
Subject: Re: minimal hardware for mp3 decoding
Date: Thu, 08 Jun 2000 11:41:19 +0200
Should work with 486 with 133 or maybe 100MHZ.
I'm using Pentium 66 with quite good results .
keep any kind of visualisation (equalizer,...) off!
Gereon Wenzel
Martin schrieb:
>
> What is the lowest-end configuration that can practically be used for
> decoding mp3 files practically? I plan to use linux and decoding will be
> the only task of the computer (i.e. no X or anything).. Could I get away
> with a slow pentium or maybe even a fast 486??
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.
------------------------------
From: Gereon Wenzel <[EMAIL PROTECTED]>
Subject: Re: need dual scsi2 card advice
Date: Thu, 08 Jun 2000 11:43:56 +0200
using an AHA2742T wich is an EISA dual AIC7xxx device.
the PCI adaptecs should work as good.
Gereon Wenzel
Anthony Ewell schrieb:
>
> Hi,
>
> Anyone have a favorite dual channel SCSI-2 (10 MB/sec)
> or SCSI-3 (20 MB/sec) controller card that is Linux friendly?
>
> Many thanks,
> --Tony
> aewell @ gbis dot com (remove the spaces, change the "dot" to ".")
------------------------------
From: =?iso-8859-1?Q?Ga=EBl?= HAMON <[EMAIL PROTECTED]>
Subject: USB HP8210e CD Burner
Date: Thu, 08 Jun 2000 11:39:21 +0200
Hey all,
How to set up linux kernel in order to use USB HP8210e CD Burner in
Mandrake 7.0 ??
__________________
Ga�l HAMON
ICQ : 54828108
http://gh1.free.fr
------------------------------
From: =?iso-8859-1?Q?S=E9bastien?= Cottalorda
Subject: Token Ring Adapter
Date: Thu, 08 Jun 2000 11:53:46 +0200
Hi all,
I need to buy a Token ring adapter, but I don't know wich one can work
on my config :
Linux RedHat 6.0
the cards :
- Olicom RapidFire 3140 (Token Ring PCI 16/4 Adapter)
- Olicom RapidFire 3141
- IBM Token Ring Adapter PCI 16/4
Or if you have any other card to suggest ...
Thanks in advance
Sebastien
------------------------------
From: Flukezero <[EMAIL PROTECTED]>
Subject: Re: S3 Savage 2000, ATI Rage 128GL or Matrox G400
Date: Thu, 08 Jun 2000 06:33:06 -0400
Reply-To: [EMAIL PROTECTED]
It's best to goto to places like
sharkeyexetreme.com
dailyradar.com
and other hardware sites to get this info, their reviews will be more
in depth
------------------------------
From: Detlef Gossrau <[EMAIL PROTECTED]>
Subject: Re: SAN/Fibre Channel/Brocade Switches/Compaq Storageworks
Date: Thu, 08 Jun 2000 12:34:21 +0200
Craig Ruff wrote:
>
> In article <8h0nj9$2hi$[EMAIL PROTECTED]>,
> Ken Weaverling <[EMAIL PROTECTED]> wrote:
> >Compaq is saying that Linux is only supported using FC-AL (arbitrated
> >loop, basically a FC hub versus a FC switch).
>
> The QLogic web site has a QLA2200 beta driver (v2.11) that supports switched
> mode, which I've tested a bit. It really needs some patches to prevent the
> driver from locking the system in kernel mode in the driver for large
> amounts of time while it was initializing. I don't know if QLogic has
> incorporated my suggestions in some form or another yet.
> I send my diffs to this driver if anyone would like them.
I would too :-) . Send it to the office email address you find in the
footer.
I'm testing a LINUX system with a QLOGIC2100 and a brocade switch
( Silkworm 2800 ). But there is now way to reach the brocade switch
via fabric login. The brocade people suggest 'quick loop' mode on
the switch.
Has anybody experiences with that ??
--
Detlef Gossrau office phone : +49 89 636-47856
Dep. FSC EP ST SMS office mailto:[EMAIL PROTECTED]
Otto-Hahn-Ring 6
D-81739 Munich privat mailto:[EMAIL PROTECTED]
------------------------------
From: "Greg H." <[EMAIL PROTECTED]>
Subject: LILO, FreeBSD, and >1024th Cylinder
Date: Thu, 08 Jun 2000 11:02:52 GMT
Hi all,
I have a 20.5G IDE harddrive broken up basically into
three equal parts with the exception of a single swap
partition at the front of the drive. The second partition
(the first 1/3) is a Slackware install, the third will
eventually be a different Linux distribution, and the fourth
is a FreeBSD "slice." Both installed fine and I installed
a recent version of LILO with support for drives with
more than 1024 cylinders. I added the proper information
for FreeBSD to lilo.conf (Linux+FreeBSD HOWTO) and LILO
installed to the MBR with no problems when I used the "-L"
switch (LBA32). However, when I reboot and attempt to boot
FreeBSD, I get "read error" and it hangs. If I hit return,
it goes back to the LILO prompt. So, what I'm trying to
figure out is if whether I am doing something wrong or what
I'm doing can't be done.
Any help is greatly appreciated. Thanks in advance!
Greg
------------------------------
From: "coleung" <[EMAIL PROTECTED]>
Subject: How to access the CD-rom on channel B of a scsi card?
Date: Thu, 8 Jun 2000 19:11:03 +0800
------------------------------
From: Tobi <[EMAIL PROTECTED]>
Subject: Re: Token Ring Adapter
Date: Thu, 08 Jun 2000 13:21:06 +0200
S=E9bastien Cottalorda wrote:
> =
> Hi all,
> =
> I need to buy a Token ring adapter, but I don't know wich one can work
> on my config :
> Linux RedHat 6.0
> =
> the cards :
> - Olicom RapidFire 3140 (Token Ring PCI 16/4 Adapter)
> - Olicom RapidFire 3141
> - IBM Token Ring Adapter PCI 16/4
> =
> Or if you have any other card to suggest ...
> =
> Thanks in advance
> =
> Sebastien
Install the kernel sources and run "make menuconfig" or "make xconfig".
Then look at the token ring adapter section to see which devices
are supportet. Me thinx the IBM is in there.
But with most cards you buy, theres a linux driver on disk.
tobias
------------------------------
From: Tobi <[EMAIL PROTECTED]>
Subject: scsi interface doesnt work
Date: Thu, 08 Jun 2000 13:24:46 +0200
hi
i have two different scsi cards one AZ delivered with mustek scanners
and the other is an adaptec ava 1505/1515. i compiled them as modules
but when i want to insmod them, the kernel responds with
"device or resource busy". (the adaptec card is reckognized at bios
boot)
could sb help me?
thank you tobi
------------------------------
Date: Thu, 08 Jun 2000 11:58:16 +0100
From: Max Lock <[EMAIL PROTECTED]>
Crossposted-To: comp.hardware
Subject: Hauppage s-video pinout?...
Hi Folks,
I have a hauppage win-tv radio card, used under Linux quite
successfully.
I need to know what the pinout is on the s-video port. This isn't a
standard 4 pin connector more like a 7 pin mini-din connector.
If anyone has any pointers I'd be very grateful, none of the search
engines has turned anything up yet, and the hauppage web page is
`lacking' :)
-Cheers Max.
------------------------------
From: The Sokos Family <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
Crossposted-To:
comp.sys.ibm.pc.hardware.storage,alt.comp.hardware,alt.comp.hardware.homebuilt,alt.comp.hardware.homedesigned,alt.comp.hardware.pc-homebuilt
Subject: Re: Heads, et al...Confused in NF, Canada...*smile*
Date: Thu, 08 Jun 2000 07:47:42 -0400
The single side of a platter is NOT referred to as a head.
The head is only the read/write head. In the real hardware,
there is one read/write head for each side of each physical
platter, so if you have two platters you do have four heads,
but that doesn't mean you call the platter the head. The
platter is, well, the platter. :-)
Modern drives allow "translations" where the computer specifies
some number of heads, cylinders, etc. and the drive translates
this to the real number of heads, etc. You'll find that many
drives have several different translations that you can use.
Often the translation will have 16 heads, when the physical
drive only has two platters (4 heads). The computer thinks
that the drive has 16 heads but the drive controller knows
there are really only 4. Different head numbers end up referring
to different sections of the same platters, and the drive
controller (that big mess of chips on the bottom of the drive)
handles the translation.
Real drives have as few heads and platters as possible, since
these things cost $$$.
Note that some translations will end up with a bit of unused
data on the disk, so if you multiply out the logical head/cyl/sec
you may end up with a slightly smaller number than the drive's
actual capacity.
Hendrix wrote:
>
> Hi guys,
>
> Until recently, I understood two meanings of the word "head" in
> conjunction with a hard drive... One understanding of mine was that the
> word "head" referred to the read/write head that is used to read/write
> data from a particular side of a platter. Another understanding I had
> was that a single side of a platter was referred to as a head. Thus, a
> hard drive with 4 platters would have 8 heads (ex: 4 platters x 2
> sides/platter = 8). Whether you're counting read/write heads, or sides
> of a platter, you will still come up with 8 heads...
>
> Does this sound right...??? It sounds right to me...EXCEPT...I have a
> hard drive here that I know has only 2 platters, but yet it is rated as
> having 16 heads... It is a 2.57GB Fujitsu that is rated as having a
> geometry of 4982Cyl 16Hds 63Sec/Trk....!!! And if my previous
> calculations are correct, the head count would yield 8 platters...
>
> Also, I have another misunderstanding regarding this calculating
> procedure... For instance, if the number of cylinders on a drive is
> equal to the number of tracks on each side of a platter then (Cylinders
> x (Number of Sides) would equal the number of tracks that are on the
> disk... Now, if I have the number of tracks on a disk, then all I would
> have to do to calculate the size of the drive would be to take the
> sectors/track information, multiple it by 512, and then multiple it
> again by the number of tracks on the disk... Logically this should
> yield the amount of space on the drive. But it doesn't...
>
> Consider the following:
> (Fujitsu 2.57GB with 2 platters)
>
> C=4982 H=16 S=63 BPS=512
> SizeOfDrive = C x H x S x BPS
> = 4982 x 16 x 63 x 512
> = 2571190272
>
> This is correct... But consider the following (which would logically be
> the same):
> (Still using the 2.57GB Fujitsu with 2 platters)
>
> C=4982 H=16 S=63 BPS=512
> NumberOfTracks = C x NumberOfPlatters x 2 (There are 2 sides to every
> platter)
> = 4982 x 4
> = 19928
> SizeOfDrive = NumberOfTracks x S x BPS
> = 19928 x 63 x 512
> = 642797568
>
> So my question is... Why are these calculations coming out differently
> if their respective meanings and translations are the same
> throughout... The only thing I can think of is that I am
> misunderstanding the meaning of a head... If a head is supposed to
> represent a platter surface, or a magnetic reading and writing device,
> then there is no way in hades that there are 16 heads on a 2 platter
> drive...*smile*
>
> Thanks for reading guys... I look forward to reading your comments...
>
> Sincerely,
> Confused in Canada......
> --
> Trevor Penney,
> A+, Network+ Certified
--
Mark Sokos ([EMAIL PROTECTED]) Electrical Engineer,
Computer Geek (er, programmer), and no talent bum musician
http://users.desupernet.net/sokos - comp.arch.hobbyist FAQ,
electronic schematics and tutorials
------------------------------
From: "T Bluck." <[EMAIL PROTECTED]>
Crossposted-To:
comp.sys.ibm.pc.hardware.storage,alt.comp.hardware,alt.comp.hardware.homebuilt,alt.comp.hardware.homedesigned,alt.comp.hardware.pc-homebuilt
Subject: Re: Heads, et al...Confused in NF, Canada...*smile*
Date: Thu, 8 Jun 2000 09:38:28 +0000
In article <[EMAIL PROTECTED]>, Hendrix <[EMAIL PROTECTED]>
writes
>Hendrix wrote:
>>
>> Hi guys,
>>
>> Until recently, I understood two meanings of the word "head" in
>> conjunction with a hard drive... One understanding of mine was that the
>> word "head" referred to the read/write head that is used to read/write
>> data from a particular side of a platter. Another understanding I had
>> was that a single side of a platter was referred to as a head. Thus, a
>> hard drive with 4 platters would have 8 heads (ex: 4 platters x 2
>> sides/platter = 8). Whether you're counting read/write heads, or sides
>> of a platter, you will still come up with 8 heads...
>>
>> Does this sound right...??? It sounds right to me...EXCEPT...I have a
>> hard drive here that I know has only 2 platters, but yet it is rated as
>> having 16 heads... It is a 2.57GB Fujitsu that is rated as having a
>> geometry of 4982Cyl 16Hds 63Sec/Trk....!!! And if my previous
>> calculations are correct, the head count would yield 8 platters...
Hello Hendrix
The drive's electronics present a system-friendly set of
values for the interface. and re-map onto the physical disc. so
you may well have a two-platter drive, with three of four "real"
heads, but the track and sector numbers may well be unusable in
their raw-form by the host. (BIOS limits to C.H.S. values)..
All The Best.
--
Tim Bluck. TB565 http://www.planet-tharg.demon.co.uk
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