[Tfug] e2fsck question

[Harry McGregor]

On Mon, 2005-06-13 at 16:28 -0700, Brian Murphy wrote:
> Let it run overnight before judging it dead.  You're probably in pass 1B
> -- a scan for duplicate and/or bad blocks.  I expect a drive that size
> to run for several hours.  With USB it might be a day.  As you've
> noticed, the progress bar isn't very accurate.

You have to remember that USB 1.1 is only 12Mbit/sec.  The FSCK will
read over the entire disk several, even if it's not a full read of every
sector, it's still going to be a heck of a lot

A full read on that drive should be of the order of 45 Hours for USB 1.1
on a 250GB hard disk drive.

250*1000*8/12/60/60

If you are on USB 2, your limited to your HD data rate, probably around
15-25Mbyte/sec

Let's use 20 for the math

250*1000/20/60/60

Or about 3.5 hours


			Harry


> Brian
> 
> Quoting Jim Secan <jim at nwra.com>:
> > Well, I've killed and restarted e2fsck using the -y option and added -C 0
> > to get a progress bar.  It ramped up to 2.7% done in about a minute (Pass
> > 1) and has been sitting there for the last 15 minutes.  No other messages
> > or warnings other than the initial warning that the disk contains errors.
> >> From what I could tell, the program was between 3% and 4% done when I
> > killed it.  Am I dealing with a seriously munged disk?  It is a new disk,
> > written to once (a cp of about 100GB) on an FC3 system, and FEDEXed to me
> > from Seattle.  I'm starting to think this is not a good way to transfer a
> > large chunk of data.
> >
> > Jim
> > *---------------------*-------------------------------*
> > | Jim Secan           | Northwest Research Assoc, Inc |
> > | (jim at nwra.com)      | 2455 E. Speedway, Suite 204   |
> > | (520) 319-7773      | Tucson, Arizona 85719         |
> > |    Space Weather Info: http://www.nwra-az.com/      |
> > *---------------------*-------------------------------*
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> 
> 
> 
> The opinions or statements expressed herein are my own and should not be
> taken as a position, opinion, or endorsement of the University of
> Arizona.
> 
> 
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