How to delete all partitions for a complete reinstall

[Alexander Skwar]

Tony Arnold <tony.arnold at manchester.ac.uk>:

> Alex,
> 
> On Tue, 2006-08-15 at 11:55 +0200, Alexander Skwar wrote:
> 
>> With Erics command, a "huge" number of write requests is sent (512,
>> to be exact). And every time, just 1 byte is written. That's tremendously
>> slow!
> 
> And possible 512 reads too, as for each byte written, dd would have to
> read the block first before writing it back again.

True.

> It could cache the 
> block, of course.

Caching the 1 byte read from /dev/zero? :)

> zzalsaca at beeblebrox:~$ time dd if=/dev/zero of=zero.bs2    bs=
> $((1*1024*1024)) count=1
> 1+0 records in
> 1+0 records out
> Segmentation fault
> 
> real    0m0.035s
> user    0m0.000s
> sys     0m0.020s
> zzalsaca at beeblebrox:~$ ls -l zero.bs*
> -rw-r--r-- 1 zzalsaca zzalsaca 1048576 2006-08-15 13:39 zero.bs1
> -rw-r--r-- 1 zzalsaca zzalsaca 1048576 2006-08-15 13:40 zero.bs2
> 
> But I also get a segmentation fault in the middle of dd's output.

In the middle? According to your output, the dd was complete.

> Is 
> this due to running the -26 kernel? or something else?

I don't know.

Alexander Skwar
-- 
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