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Message from discussion 40 LinuxPartitions to USB external HDD?
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Grant  
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 More options Nov 8 2012, 7:30 pm
Newsgroups: alt.os.linux.slackware
From: Grant <o...@grrr.id.au>
Date: Fri, 09 Nov 2012 11:24:47 +1100
Local: Thurs, Nov 8 2012 7:24 pm
Subject: Re: 40 LinuxPartitions to USB external HDD?
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On Thu, 8 Nov 2012 22:32:19 +0000 (UTC), Avoid9...@gmail.com wrote:
>After a disasterous attempt to <assemble> a MoBo to copy my
>IDEs to SATA, I've decided to temporarily use an external USB
>hard-drive.

>But, as you know, the docos are all written for Micro$loth;
>and I don't know about this "HPFS/NTFS" stuff?

>$ fdisk -l == ...
>Disk /dev/sda: 500.1 GB, 500107862016 bytes
>255 heads, 63 sectors/track, 60801 cylinders
>Units = cylinders of 16065 * 512 = 8225280 bytes
>Disk identifier: 0x1c0fd702

>   Device Boot      Start         End      Blocks   Id  System
>/dev/sda1               1       60802   488384536    7  HPFS/NTFS
>---------------

>$  cfdisk /dev/sda1  ==FATAL ERROR:
>Bad primary partition 0: Partition begins after end-of-disk
> Press any key to exit cfdisk

>-> fdisk /dev/sda1 ==
>The number of cylinders for this disk is set to 60801.
>There is nothing wrong with that, but this is larger than 1024,
>and could in certain setups cause problems with:
>1) software that runs at boot time (e.g., old versions of LILO)
>2) booting and partitioning software from other OSs
>   (e.g., DOS FDISK, OS/2 FDISK)

>Command (m for help): p

>Disk /dev/sda1: 500.1 GB, 500105764864 bytes
>255 heads, 63 sectors/track, 60801 cylinders
>Units = cylinders of 16065 * 512 = 8225280 bytes
>Disk identifier: 0x6e697373

>This doesn't look like a partition table
>Probably you selected the wrong device.

>     Device Boot      Start         End      Blocks   Id  System
>/dev/sda1p1   ?      120528      234814   918008208   4f  QNX4.x 3rd part
>Partition 1 does not end on cylinder boundary.
>/dev/sda1p2   ?      119381      153271   272218546+  73  Unknown
>Partition 2 does not end on cylinder boundary.
>/dev/sda1p3   ?      113202      147075   272087568   2b  Unknown
>Partition 3 does not end on cylinder boundary.
>/dev/sda1p4   ?      177064      177067       27487   61  SpeedStor
>Partition 4 does not end on cylinde r boundary.

Likely formatted as 'superfloppy', that is, no partition table, just
a single vfat filesystem.  

Try mounting /dev/sda if you want to recover the info, otherwise clear
the drive by writing zeroes to the first few MBs:

dd if=/dev/zero bs=1M count=4 of=/dev/sda

Leave out the count to clear the entire drive.

>Partition table entries are not in disk order
>-----------------

>$ lsusb ==
>Bus 003 Device 013: ID 0480:a007 Toshiba America Info. Systems, Inc.
>...
>------------------
>Previously I had BIG problems with my Slakware-13 and /dev/sd*
>with inode-size incompatibilities which I'd never even thought about.

>Also, I want to have more than 16 partitions [for certin reasons]
>and eg. AFAIK Slakware's <lilo script> assumes < 17 partitions;
>even it I don't YET anticipate booting from this USB hard-drive.

You may lose partitions >16.  This happened to me way back, but
I don't remember the details, it used to work a very long time ago.

>So, should I just try to partition it like the old IDEs ?

>== TIA.

>PS. my confidence was shattered by an expensive discovery that you
>can't just interchange MOBOs, CPUs and power-supplies, like in the
>old days.

So many variations, once you get into multi-processing territory.

No, not with windows.  Should work for Slackware, but then I need to
compile custom kernels to get a working screen.  I'm about to dump the
particular hp compaq with that issue for a Core2Duo box that is better
behaved.

I upgraded CPUs recently, but still on Intel LGA775, cannot justify
going to latest CPU family for speed these days, I'll wait for something
to break.

Put an SSD in the Windows box I mostly type on :)  No point for Linux,
unless once needs the disk buffering for movie editing or something big.

Grant.


 
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