[plug] dd speed estimates and /dev/hdx grepping

[Jay Turner]

Great news!

Copy time took less than 10mins and its just fired up fine on the copied
drive!

I'm now impressed.

Thanks to all for assistance.

Jay

> -----Original Message-----
> From: plug-admin at plug.linux.org.au
> [mailto:plug-admin at plug.linux.org.au]On Behalf Of Jay Turner
> Sent: Thursday, 23 October 2003 1:09 PM
> To: plug at plug.linux.org.au
> Subject: RE: [plug] dd speed estimates and /dev/hdx grepping
>
>
> DOH!
>
> Forgot it was 512b not 512kb.. I stopped it and reset it to bs=512k
>
> New restart time.. 13:05WST
>
> > -----Original Message-----
> > From: plug-admin at plug.linux.org.au
> > [mailto:plug-admin at plug.linux.org.au]On Behalf Of Craig Ringer
> > Sent: Thursday, 23 October 2003 12:56 PM
> > To: plug at plug.linux.org.au
> > Subject: Re: [plug] dd speed estimates and /dev/hdx grepping
> >
> >
> > > I have now started the copy with dd if=/dev/hda of=/dev/hdc
> > > I checked the cache size for the drives the src has 512kb and
> > the dest has
> > > 2Mb.. so i left the default bs as is.
> >
> > dd uses a 512B block size by default - you probably wanted at least
> > 512kB. A wee bit late now, of course.
> >
> > > I started this at 12:40WST so we'll see how long it takes.. and
> > if it even
> > > works.
> >
> > It's quite possible that the new disk will come out unreadable due to
> > issues with disk "geometry". While modern disks don't expose their
> > internal geometry, they do provide "virtual" disk geometry to the BIOS
> > and this can differ disk-to-disk. I've certainly had problems with
> > disk-to-disk copies between non-identical disks. I've found the most
> > reliable way is to recreate the partition table on the new
> disk, then do
> > a partition-by-partition copy. This is also more flexible. Still, with
> > luck the direct copy of the entire disk will do the trick.
> >
> > Craig Ringer
> >
> >
> > _______________________________________________
> > plug mailing list
> > plug at plug.linux.org.au
> > http://mail.plug.linux.org.au/cgi-bin/mailman/listinfo/plug
> >
> >
>
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>


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