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Date: Thu, 26 Jun 2014 22:46:59 -0400 From: Theodore Ts'o <tytso@....edu> To: Pavel Machek <pavel@....cz> Cc: kernel list <linux-kernel@...r.kernel.org> Subject: Re: ext4: total breakdown on USB hdd, 3.0 kernel On Thu, Jun 26, 2014 at 10:30:52PM +0200, Pavel Machek wrote: > > It looks like the filesystem contains _way_ too many 0xffff's: That sounds like it's a hardware issue. It may be that the controller did something insane while trying to do a write at the point when the disk drive was disconnected (and so the drive suffered a power drop). > I saved beggining of the filesystem using cat /dev/sdc4 | gzip -9 - > /dev/sda3, but > then ran out of patience. So there may be something for analysis, but... The way to snapshot just the metadata blocks for analysis is: e2image -r /dev/hdc4 | bzip2 > ~/hdc4.e2i.bz2 But in this case, it's I doubt it will be very helpful, because fundamentally, this appears to be a hardware issue. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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