Date: Sun, 14 Mar 2004 13:04:11 +0100 From: "Christoph P. Kukulies" <kuku@kukulies.org> To: =?iso-8859-1?Q?S=F8ren?= Schmidt <sos@DeepCore.dk> Cc: freebsd-hackers@freebsd.org Subject: Re: off topic - disk crash Message-ID: <20040314120411.GA16600@gilberto.physik.rwth-aachen.de> In-Reply-To: <4054410E.3000401@DeepCore.dk> References: <20040311153709.AD00216A4D6@hub.freebsd.org> <20040311174030.GB8190@tikitechnologies.com> <xzpk71qaz93.fsf@dwp.des.no> <20040314104717.GA16158@gilberto.physik.rwth-aachen.de> <4054410E.3000401@DeepCore.dk>
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On Sun, Mar 14, 2004 at 12:25:02PM +0100, Søren Schmidt wrote: > Christoph P. Kukulies wrote: > > >Thanks for all the helpful tips so far. It is a DLTA 307045 (3.5") > >Don't know whether this is a 75GXP. > > It is one of the dreaded models experience shows that all models after > this has some kind of problems, no wonder they sold out :) > > >I'm getting either these: > > > >ad2: TIMEOUT - READ_DMA retrying (2 retries left) LBA=30583 > > > >Which don't stop the dd process. > > > >And these, > > > >ad2: FAILURE - READ_DMA status=51<READY, DSC, ERROR> > >error=40<UNCORRECTABLE> LBA=9156 > > > >leading to termination. > > > >Also the transfer rate is terribly slow: (80 KB/s) > > > >I was able to save 18 MB (of 46 GB) (not much so far) > > > >Any other suggestions? > > Use the noerror and sync flags to dd, that will get past errors and put > in NULL sectors for those you cant read. However it will take a looong > time and probably tear off the sorry rests of your magnetic coating on > the platters :( It is now dumping and I'm at 2.7 GB meanwhile. No more errors since the last one at LBA=670000 . Are these LBS identical to the block #? Maybe I'll give it another try (when this pass is through) and dump from the beginning. I'm about to get me a second identical model and maybe I then can dd the whole image including partition table so that I will not have to scan the disk for the start of the filesystems. Some time ago I wrote a little program to scan a disk for the start of a FS. Unfortunately that program is also on the crashed disk :-O -- Chris Christoph P. U. Kukulies kuku_at_physik.rwth-aachen.de
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