Linux-Hardware Digest #2, Volume #13 Wed, 7 Jun 00 20:13:11 EDT
Contents:
Re: modules on separate /usr - can't initialize from loadlin (Andrey Vlasov)
floppy mount (Anthony Thompson)
Re: CD-RW only in simple DMA-Mode? How-to.... ("Steve Preston")
Re: CD-RW only in simple DMA-Mode? How-to.... ("Steve Preston")
Re: Tape Drive (David C.)
Re: Winmodem or Not? (Daniel R.)
Re: floppy mount ("Peter T. Breuer")
Re: VFS: Disk change detected on device sr(11,0) (Frank Tenfjord)
Re: CD-RW only in simple DMA-Mode? How-to.... (Andrey Vlasov)
Re: SCSI-Tape, how? (David C.)
Re: Win2000 Nt Booter and Linux (Doc Shipley)
film scanner, w scsi supported on LINUX? (Paul Elliott)
Re: CD-RW only in simple DMA-Mode? How-to.... ("David Jarvis")
Re: rockwell/conexant modem drivers ("azmin")
Re: 5 ethernet ports on the same Linux Box ([EMAIL PROTECTED])
On board sound Aopen MX59 proII motherboard (Kevin Hayes)
Firewire/1394 hard drives that have linux drivers? (@cisco.com)
Re: Heads, et al...Confused in NF, Canada...*smile* (Charles M. Kozierok)
----------------------------------------------------------------------------
From: Andrey Vlasov <[EMAIL PROTECTED]>
Subject: Re: modules on separate /usr - can't initialize from loadlin
Date: Wed, 07 Jun 2000 14:16:58 -0700
Hi Yuri,
what distro do you have? In my case modules located in
/lib/modules/{kernel version}/ - (RedHat).
Are you sure that it located there?
Andrey
------------------------------
Date: Wed, 07 Jun 2000 16:24:30 -0500
From: Anthony Thompson <[EMAIL PROTECTED]>
Subject: floppy mount
When I go to mount my floppy drive it gives me an I/O error. However,
the floppy works fine. How do I fix this problem?
Anthony Thompson
------------------------------
Reply-To: "Steve Preston" <[EMAIL PROTECTED]>
From: "Steve Preston" <[EMAIL PROTECTED]>
Subject: Re: CD-RW only in simple DMA-Mode? How-to....
Date: Wed, 7 Jun 2000 14:22:34 -0700
Crossposted-To:
alt.windows98,de.comp.os.unix.linux.hardware,microsoft.public.win98.performance
What "Dances with Crows" said is correct in my opinion. My HP-8101I CD-RW
will NOT run with UDMA enabled in my bios or under system settings in
WIN98SE.
PresCo & Associates
Steve Preston
Las Vegas, NV
Thirsty McGuinness <[EMAIL PROTECTED]> wrote in message
news:8hm5vl$nak$[EMAIL PROTECTED]...
> Hi,
> I just installed a new CD-RW, and it doesn�t seem to work with UDMA.
> Seems strange to me cause a CD-RW should have a faster data-transfer-rate,
I
> always thought.
> Maybe I made a mistake with conf.? (see below)
>
> IF it does only use DMA, can I connect it via an U-ATA66-cable as
> secondary-slave?
> It would be useful �cause I�d like to have this configuration:
>
> pri.-master : ATA66-HD
> pri-slave : CD-ROM-Drv. (which seems to run fine in UDMA-Mode)
> sec.-master : ATA66-HD
> sec.-slave : CD-RW
>
> This conf. is needed �cause I want to use Software-RAID under Linux and
for
> performance in both win and lin.
> Anyone got the knowledge?
>
> Thanks.
>
>
------------------------------
Reply-To: "Steve Preston" <[EMAIL PROTECTED]>
From: "Steve Preston" <[EMAIL PROTECTED]>
Subject: Re: CD-RW only in simple DMA-Mode? How-to....
Date: Wed, 7 Jun 2000 14:26:23 -0700
Crossposted-To:
alt.windows98,de.comp.os.unix.linux.hardware,microsoft.public.win98.performance
As another note, DO NOT connect any CD-drive to the UDMA cable as it will
only slow down the "true" UDMA divice(s).
Thirsty McGuinness <[EMAIL PROTECTED]> wrote in message
news:8hm5vl$nak$[EMAIL PROTECTED]...
> Hi,
> I just installed a new CD-RW, and it doesn�t seem to work with UDMA.
> Seems strange to me cause a CD-RW should have a faster data-transfer-rate,
I
> always thought.
> Maybe I made a mistake with conf.? (see below)
>
> IF it does only use DMA, can I connect it via an U-ATA66-cable as
> secondary-slave?
> It would be useful �cause I�d like to have this configuration:
>
> pri.-master : ATA66-HD
> pri-slave : CD-ROM-Drv. (which seems to run fine in UDMA-Mode)
> sec.-master : ATA66-HD
> sec.-slave : CD-RW
>
> This conf. is needed �cause I want to use Software-RAID under Linux and
for
> performance in both win and lin.
> Anyone got the knowledge?
>
> Thanks.
>
>
------------------------------
From: [EMAIL PROTECTED] (David C.)
Crossposted-To: redhat.general
Subject: Re: Tape Drive
Date: 07 Jun 2000 17:31:09 -0400
Ronald Cole <[EMAIL PROTECTED]> writes:
> "Mike Sanders" <[EMAIL PROTECTED]> writes:
>>
>> Does Red Hat Linux support Sony TSL-S9000L 192Gbyte DDS3 Tape
>> Autoloader? If it does, where can I get the driver for it?
>
> If it's SCSI-2 compatible, it will. The driver is the driver for your
> scsi card. I have a pair of SDT-9000's that work just fine.
Actually, there is a separate tape driver, but it's generic and works
with nearly all SCSI-2 tape drives. It's also built-in to most Linux
distributions, so you normally don't even have to think about it.
(Unfortunately, this rule is not as hard and fast as I'd like. For
example, the OnStream SC30 and SC50 drives claim to be SCSI-2 compliant,
but the manufacturer says that they won't work with Linux. I don't know
if the drives are actually non-compliant or if there's a bug in the SCSI
tape driver that's causing the problem. OnStream says that they are
working to get these drives supported.)
(If you are interested in an OnStream drive, their high-end ADR50 drive
is compatible with the Linux SCSI tape driver. They also have a patched
version of the IDE tape driver that allows their ATAPI drive to work
with Linux.)
-- David
------------------------------
From: Daniel R. <[EMAIL PROTECTED]>
Subject: Re: Winmodem or Not?
Date: Wed, 07 Jun 2000 21:30:02 GMT
Compaq 1800XL series uses win modems. All presarios do.
The Armada series does as well. last notebook from compaq to come out with
a real modem was the 3500/6500 series on the armada line I believe
-Daniel R>
Commercial Compaq Technicle Support Engineer.
sysv wrote:
>
>
> Is this a winmodem or not. I cannot tell by reading
> the HOWTOs or by the Winmodem pages. Any advice?
> Below is the Linux system information on the hardware,
> and the manafacture is Lucent, and its in a Compaq
> 1800XL laptop.
>
>
> # dmesg
> Serial driver version 4.27 with no serial options enabled
> ttyS00 at 0x03f8 (irq = 4) is a 16550A
>
> This reports ttyS00 above, but setserial reports
>
> # setserial -a /dev/ttyS0
> /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
> Baud_base: 115200, close_delay: 50, divisor: 0
> closing_wait: 3000, closing_wait2: infinte
> Flags: spd_normal skip_test
>
> # cat /proc/pci
>
> Bus 0, device 9, function 0:
> Communication controller:
> Lucent (ex-AT&T) Microelectronics Unknown device (rev 1).
> Vendor id=11c1. Device id=441.
> Medium devsel. Fast back-to-back capable.
> IRQ 3. Master Capable. No bursts.Min Gnt=252.Max Lat=14.
> Non-prefetchable 32 bit memory at 0xf4101000 [0xf4101000].
> I/O at 0x14d0 [0x14d1].
> I/O at 0x1000 [0x1001].
>
>
> # cd /dev
> # mknod -m 660 /dev/ttyS0 c 4 64 # base address 0x03f8
> # ls -al /dev/ttyS0*
>
> crw-rw-rw- 1 root tty 4, 64 Jun 4 19:14
> ttyS0
>
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.
--
Posted via CNET Help.com
http://www.help.com/
------------------------------
From: "Peter T. Breuer" <[EMAIL PROTECTED]>
Subject: Re: floppy mount
Date: 7 Jun 2000 21:33:14 GMT
Anthony Thompson <[EMAIL PROTECTED]> wrote:
: When I go to mount my floppy drive it gives me an I/O error. However,
: the floppy works fine. How do I fix this problem?
Revise your defiition of "works fine".
Peter
------------------------------
From: Frank Tenfjord <[EMAIL PROTECTED]>
Subject: Re: VFS: Disk change detected on device sr(11,0)
Date: Wed, 07 Jun 2000 21:47:54 GMT
Dances With Crows wrote:
> On Tue, 06 Jun 2000 22:17:39 GMT, Frank Tenfjord
> <<[EMAIL PROTECTED]>> shouted forth into the ether:
> >This is the output of the dmesg command. It reapeats itself alot of
> >times, at least once a second. Does anybody know what this means? I
> >haven't noticed any thing that fails because of this, but prevents me
> >from seing other information, and is annoying.
> >I am running RH6.2 with 2.2.14 kernel.
>
> This is the automounter checking your CD-ROM every so often to see if
> you've inserted a CD. You can turn off this really annoying feature with
> the GNOME control-panel, or you can compile a new kernel without
> automounter support.
>
Thanks! It did not help switch of automount in Gnome, but I found that if I
leave a cd in each of my cd-roms, the messages does not appear. I will turn off
automounting in the kernel soon.
regards Frank
------------------------------
From: Andrey Vlasov <[EMAIL PROTECTED]>
Crossposted-To: de.comp.os.unix.linux.hardware
Subject: Re: CD-RW only in simple DMA-Mode? How-to....
Date: Wed, 07 Jun 2000 14:47:52 -0700
==============652079C83A81D7725645EF61
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Hi,
I agree with previous post that not all CDROMs support DMA mode. But for you
information
ASUS anounced new 12X DVDROM which support UltraDMA66 mode
http://computex.asus.com.tw/pr_dvd.htm
NOTE: RAID on IDE drives can hold only two HDDs for most MB, you can put extra
drives on
additional controller but it will take IRQ and I/O what can not be acceptable
in some
situations.
It can have a sence to buy new
Maxtor drives >> (Ultra ATA-66, 5400rpm )
CAN$445 Maxtor 61.4GB HD
and not use RAID at all. But this disk is new and we don't know how reliable
it. In case if it
will crash too much data can be lost.
Best idea to build RAID on SCSI drives - yes it more expensive but it
proved by time.
Adaptec 3160 provide you with two chanels which run at 160 MB/sec on each and
can hold
upto 30 HDDs. But it again depends on speed HDDs as new drives can fill both
chanels by
transferring data. In HOWTO they do not recomend put more disks than troutput
of bus
can hold. (But you have enough ID for spare disks)There are some new high
performance SCSI
disks with high capacities but it very expencive at least for now
CAN$2519 Quantum Atlas 10K II 73.4GB 10,000rpm, 5.2ms, 478MB/s, Ultra 160, 8MB
40/68/80Pin
CAN$1,309 Quantum Atlas 10K 36.4GB 10,000rpm, 5ms, 315MB/s, Ultra 160, 4MB
40/68/80Pin
CAN$1199 IBM 36GB U2W SCSI 10,000rpm
http://www.a-power.com
NOTE: I'd like to try this config for RAID but can not afford, but if somebody
test it and could provide us with result I would like to see his post in
ng.
Andrey
==============652079C83A81D7725645EF61
Content-Type: text/html; charset=us-ascii
Content-Transfer-Encoding: 7bit
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Hi,
<p>I agree with previous post that not all CDROMs support DMA mode. But
for you information
<br>ASUS anounced new 12X DVDROM which support UltraDMA66 mode
<p><A
HREF="http://computex.asus.com.tw/pr_dvd.htm">http://computex.asus.com.tw/pr_dvd.htm</A>
<p>NOTE: RAID on IDE drives can hold only two HDDs for most MB, you
can put extra drives on
<br>additional controller but it will take IRQ and I/O what can not be
acceptable in some
<br>situations.
<br> It can have a sence to buy new
<p> Maxtor drives >> (Ultra
ATA-66, 5400rpm )
<br> CAN$445
Maxtor 61.4GB HD
<p>and not use RAID at all. But this disk is new and we don't know
how reliable it. In case if it
<br>will crash too much data can be lost.
<p> Best idea to build RAID on SCSI
drives - yes it more expensive but it proved by time.
<br>Adaptec 3160 provide you with two chanels which run at 160 MB/sec on
each and can hold
<br>upto 30 HDDs. But it again depends on speed HDDs as new drives
can fill both chanels by
<br>transferring data. In HOWTO they do not recomend put more disks
than troutput of bus
<br>can hold. (But you have enough ID for spare disks)There are some new
high performance SCSI
<br>disks with high capacities but it very expencive at least for now
<p>CAN$2519 Quantum Atlas 10K II 73.4GB 10,000rpm, 5.2ms, 478MB/s,
Ultra 160, 8MB 40/68/80Pin
<br>CAN$1,309 Quantum Atlas 10K 36.4GB 10,000rpm, 5ms, 315MB/s, Ultra 160,
4MB 40/68/80Pin
<br>CAN$1199 IBM 36GB U2W SCSI 10,000rpm
<p><A HREF="http://www.a-power.com">http://www.a-power.com</A>
<p><tt>NOTE: I'd like to try this config for RAID but can not afford, but
if somebody</tt>
<br><tt> test it and could provide us with
result I would like to see his post in ng.</tt>
<pre>Andrey</pre>
</html>
==============652079C83A81D7725645EF61==
------------------------------
From: [EMAIL PROTECTED] (David C.)
Subject: Re: SCSI-Tape, how?
Date: 07 Jun 2000 17:51:37 -0400
"Matthias Minich" <[EMAIL PROTECTED]> writes:
>
> I've got my AHA1542 working now. My next problem is, how to tell the
> tape what to do... (makin' backups and so on). I've tried the
> following:
>
> "mt /dev/st0 reten"and I get an error-msg: "mt: invalid tape operation
> '/dev/st0'"
As was already mentioned, you must use the "-f" flag before the device
name. Otherwise, your "/dev/st0" is processed as a command and not a
device name. That's the reason for your error.
I would recommend not doing a "reten" command with a DAT tape, though.
It is rarely necessary, and it may take a long time to complete.
The "status" command will tell you if the drive is properly associated
with /dev/st0. The "rewoffl" command is also a useful one for testing -
it will rewind and eject your tape.
> Adaptec AHA 1542CF SCSI-Controller (Adapter is terminated)
> HP C1599A DAT-Streamer (with Maxell DDS2 4GB Tape, correct?)
Doing a search on HP's site, I found this, which I think is the drive's
home page:
http://www.hp.com/tape/mechs/c1599a.html
And this is the drive's support page:
http://www.hp.com/cposupport/prodhome/hpc1599add9628.html
OK. This is a DDS-2 drive. You can use three different kinds of tapes
in it:
60m DDS - 1.3G uncompressed
90m DDS - 2G uncompressed
120m DDS-2 - 4G uncompressed
The drive has a top speed of 3.6GB/h (which is 1MB/s) when compression
is used. (half that when hardware compression is not used.) This is
slow enough that your ISA-based SCSI card should work fine with it.
> *nothing else connected to SCSI-Bus*
The bus should be terminated on the drive or with a separate terminator
attached to the cable.
> The tape *might* be terminated. Iv set a jumper calle "TP". not sure what it
> is, because I don't have a documentation of it.
This is probably "termination power", which does just what it says -
provides a power supply for the terminator. According to HP, this
jumper should never be removed:
http://www.hp.com/cposupport/information_storage/support_doc/lpg51257.html
http://www.hp.com/cposupport/information_storage/support_doc/lpg51246.html
It appears, from browsing the site, that the drive does not provide its
own termination. So you should get a SCSI cable with a built-in
terminator or get a terminator that you can attach to the cable.
You should get an active terminator. Active terminators do a better job
of maintaining clean signals than passive terminators. Some drives
don't work well without active termination.
A multi-mode terminator (LVD/SE) won't hurt, but it is unnecessary since
your SCSI card doesn't support LVD. It will cost more, though.
-- David
------------------------------
From: Doc Shipley <[EMAIL PROTECTED]>
Crossposted-To: alt.os.linux
Subject: Re: Win2000 Nt Booter and Linux
Date: 7 Jun 2000 17:43:08 -0500
Like Jim said, you can do this from inside Linux, during the install.
Any time after you install the LILO in the bootsector of the root Linux
partition, go to a different virtual terminal by pressing
<Ctrl><Alt><F2> (If your distro doesn't use an X-based install,
<Alt><F2> will work) At the prompt
If you have a FAT partition visible to NT (say /dev/sdb1)
# mkdir /temp (Makes mount point for FAT partition)
# mount -t vfat /dev/sdb1 /temp
# dd if=/dev/sda2 of=/temp/bootsect.lnx bs=512 count=1 (Copies LILO
bootsector to bootsect.lnx)
# umount /temp
If no FAT partitions, use a DOS-formatted floppy with > 1k freespace
# mkdir /temp (Makes mount point for floppy)
# mount -t vfat /dev/fd0 /temp
# dd if=/dev/sda2 of=/temp/bootsect.lnx bs=512 count=1 (Copies LILO
bootsector to bootsect.lnx)
# umount /temp
Then when you boot into NT, follow the rest of Jim's process as below.
One note, though, with either method, you MUST update the bootsect.lnx
file anytime you rerun LILO. For example a new kernel, adding append
lines to /etc/lilo.conf.
> >
> > Copy that file bootsect.lnx to where boot.ini is (likely c:\)
> >
> > Then add an entry.
> >
> > My c:\boot.ini file
> >
> > [boot loader]
> > timeout=03
> > default=multi(0)disk(0)rdisk(0)partition(2)\WINNT
> > [operating systems]
> > multi(0)disk(0)rdisk(0)partition(2)\WINNT="Windows NT Workstation
> Version
> > 4.00"
> > multi(0)disk(0)rdisk(0)partition(2)\WINNT="Windows NT Workstation
> Version
> > 4.00 [VGA mode]" /basevideo /sos
> > C:\="Microsoft Windows"
> >
> > c:\bootsect.lnx=" RedHat Linux 6.2"
> >
> > You can see I have NT, Windows, and Linux as an option.
> >
--
Doc Shipley
Network Support
TARL Labs, UT
Austin, Texas
------------------------------
From: [EMAIL PROTECTED] (Paul Elliott)
Crossposted-To: comp.periphs.scanners
Subject: film scanner, w scsi supported on LINUX?
Date: 7 Jun 2000 22:54:51 GMT
Reply-To: [EMAIL PROTECTED]
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?
Thank you.
------------------------------
From: "David Jarvis" <[EMAIL PROTECTED]>
Subject: Re: CD-RW only in simple DMA-Mode? How-to....
Date: Thu, 8 Jun 2000 09:20:17 +1000
My experience with IDE CDR/RWs is that they do not like UDMA at all - in
fact can slow down or cause not to work at all. Best is to disable UDMA in
BIOS and if option available, set PIO mode to 4 (or less if 4 not
available.) Also worth ensuring op sys does not try and use UDMA for the
CDR/RW via appropriate settings.
Set up like this, recent IDE CRD/RWs can write at 8x.
If you want better performance go for SCSI.
David
--
=====================================================
Click here for Free Video!!
http://www.gohip.com/freevideo/
"Thirsty McGuinness" <[EMAIL PROTECTED]> wrote in message
news:8hm5vl$nak$[EMAIL PROTECTED]...
> Hi,
> I just installed a new CD-RW, and it doesn�t seem to work with UDMA.
> Seems strange to me cause a CD-RW should have a faster data-transfer-rate,
I
> always thought.
> Maybe I made a mistake with conf.? (see below)
>
> IF it does only use DMA, can I connect it via an U-ATA66-cable as
> secondary-slave?
> It would be useful �cause I�d like to have this configuration:
>
> pri.-master : ATA66-HD
> pri-slave : CD-ROM-Drv. (which seems to run fine in UDMA-Mode)
> sec.-master : ATA66-HD
> sec.-slave : CD-RW
>
> This conf. is needed �cause I want to use Software-RAID under Linux and
for
> performance in both win and lin.
> Anyone got the knowledge?
>
> Thanks.
>
>
------------------------------
From: "azmin" <[EMAIL PROTECTED]>
Subject: Re: rockwell/conexant modem drivers
Date: Thu, 8 Jun 2000 07:36:51 +0800
i've the the same problem.As long as i know our conexant chipset is not a
linmodem but winmodem ..
i afraid that it would not work in linux....
"lfcom" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]...
> hello linux-men
>
> My corel linux is not able to detect my modem (conexant chipset)
> I have found web site for windows drivers, but not for linux.
> Could you please help me?
>
> --
> Posted via CNET Help.com
> http://www.help.com/
------------------------------
From: [EMAIL PROTECTED]
Subject: Re: 5 ethernet ports on the same Linux Box
Date: 7 Jun 2000 17:32:56 -0600
I have a router running the LRP distribution (www.linuxrouter.org)
with 5 Netgear FA310TX cards in it. I believe the motherboard is an
ABIT BE6.
-bret
------------------------------
From: [EMAIL PROTECTED] (Kevin Hayes)
Subject: On board sound Aopen MX59 proII motherboard
Reply-To: [EMAIL PROTECTED]
Date: 7 Jun 2000 23:36:12 +1000
has anyone had any success in getting the onboard sound on the
aopen mx59 proII motherboard to work?
im using slackware 7, and have tried to load it as a sb clone, with limited
success ie the system sounds sort of work in gnome for example but the cdrom
doesnt work
win98 calls it a VIA AC97 Pci audio device, the via website offers linux
drivers in a driver package, but only for redhat and caldera, but no readme
instructions or explanitions, how are these drivers used?
ive also tried using the legacy settings in system bios, no joy
ive visited the aopen website, without finding anything, any suggestions
appreciated...
--
**** Kevin Hayes ****
------------------------------
From: @cisco.com
Subject: Firewire/1394 hard drives that have linux drivers?
Date: Wed, 07 Jun 2000 16:56:01 -0700
Reply-To: @cisco.com
Are there any 1394 hard drives that have linux drivers that the
manufacturers have written?
------------------------------
From: [EMAIL PROTECTED] (Charles M. Kozierok)
Crossposted-To:
comp.sys.ibm.pc.hardware.storage,alt.comp.hardware,alt.comp.hardware.homedesigned,alt.comp.hardware.pc-homebuilt
Subject: Re: Heads, et al...Confused in NF, Canada...*smile*
Reply-To: [EMAIL PROTECTED]
Date: 7 Jun 2000 20:06:11 -0400
In article <[EMAIL PROTECTED]>, Hendrix <[EMAIL PROTECTED]> wrote:
} 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...
Basically correct. You can find a rather full description of the
construction of hard drives at <http://www.PCGuide.com/ref/hdd/op/index.htm>
} 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...
Those are logical geometry parameters. They have nothing to do with the
physical drive geometry any more. Modern drives don't have the same
number of sectors in each track, so the old ways of specifying drive
sizes no longer work. Logical geometry is basically a hack so we can let
modern drives be specified the same we specified 20 MB clunkers 20 years
ago. Well, at least up to 8.4 GB anyway. :)
} 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...
It would be (number of cylinders) * (number of surfaces)
} 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...
It should, if the logical geometry is correct and the drive is under 8.4
GB in size.
} 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...
You're mixing physical and logical geometry in the second calculation.
The number of sectors per track on modern drives varies based on where
you are on the disk; the 63 is meaningless. See:
<http://www.PCGuide.com/ref/hdd/geom/index.htm>
cheers,
-*-
Charles M. Kozierok (mailto:[EMAIL PROTECTED])
Webslave, The PC Guide - http://www.PCGuide.com
Comprehensive PC reference, troubleshooting, optimization and procedures...
------------------------------
** FOR YOUR REFERENCE **
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End of Linux-Hardware Digest
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