[NBLUG/talk] dd_rescue help
howardas at pacbell.net
Wed Feb 16 12:00:28 PST 2011
Thanks, I'm going to halt dd_rescue since it may be degrading the drive. I saw reference to dd_rhelp and will look into that. And last see if about the cold pack trick.
--- On Wed, 2/16/11, Allan Cecil <ac at sonic.net> wrote:
> From: Allan Cecil <ac at sonic.net>
> Subject: Re: [NBLUG/talk] dd_rescue help
> To: "General NBLUG chatter about anything Linux, answers to questions, etc." <talk at nblug.org>
> Date: Wednesday, February 16, 2011, 11:51 AM
> Just to get this out there the
> freezer trick only has the potential to help in very
> specific types of failures. The most common failure
> type (that of foreign material causing damage to the head or
> platter) is generally unaffected by temperature changes.
> Look at the destination where you're telling dd_rescue to
> put the files; if that hasn't grown in size give up and try
> a different approach. The 2.2 TB partition size is
> concerning and is indicative of a corrupt partition table
> but dd_rescue is going to copy *everything* (including any
> bunk partition information) but that can likely be worked
> around later.
> I'm not up to speed on the latest tools (Kyle can probably
> chime in) but dd_rhelp may be a better tool for you as it
> will look at the areas that are readable first rather than
> wasting time on what can't be read.
> Best of luck,
> On 02/16/2011 11:31 AM, gandalf at sonic.net
> > I've had the freezer bag work on a failing drive. Also
> putting something real cold on top of the drive may extend
> the time of working. I used a canned air that was blown dry
> and thus got real cold, but an ice pack or two would
> probably also work fine. When cold the bearings run tighter
> and then they loosen up as they get warmer. In my experience
> you have 15 or 20 minutes of good use before they warm up.
> Keeping them cold can extend this.
> > It's a great help if you know the particular files you
> need to get off the drive. Instead of copying the whole
> thing try specific targets. You might have to repeat the
> process although dedregration is highly probable. The
> problem with the freeze method is that it causes
> condensation inside the drive which can be very bad.
> > Sorry don't know about dd_rescue, but it sounds like
> such a program is taking a long/everything approach which
> may lead to further wear on the drive.
> > (imagine a cute or dirty tagline here)
> > On Wed 16/02/11 10:58 AM , Howard
> Schnirman howardas at pacbell.net
> >> I've been running dd_recue on a notebook sata
> 160gb drive attached by USB
> >> case. dd_rescue has been running for over 24hrs.
> But I have a feeling that
> >> I should halt the program because errs and bad
> blocks are the same, and the
> >> far right says succxfer 0.0K%. So it basically
> looks like the whole drive
> >> is toast and dd_recue is skipping everything.
> >> Can some one confirm for me that this process thus
> is useless for my
> >> drive.One more thing Disk Utility in Ubuntu is
> showing the drive as a 2.2 TB
> >> drive.Can that be the problem or is there any way
> to fix this.
> >> I'm close to doing the last resort of the old
> freezer bag trick I've read
> >> some where on line.
> >> Howard
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