On 18 June 2016 at 21:53, Mark Fraser <mfraz74+ubu...@gmail.com> wrote:
> > > On 18 June 2016 at 16:21, Mark Fraser <mfraz74+ubu...@gmail.com> wrote: > > > Bought a new 3TB hard drive this week onto which I created a new GPT > > > partition > > > table and a 3TB ext4 partition. This completed successfully and I used > > > rsync > > > to copy some files onto it. > > > > > > The next day, I was unable to mount the drive and so I ran fsck on it. > > > This > > > failed pass 5: Checking group summary information with lots of block > > > bitmap > > > differences. > > > > > > I fixed these, but on running fsck a second time, these block > differences > > > were > > > back. > > > > > > Now this drive is currently sat in an external USB tray so that I could > > > copy > > > files across before replacing the one in the computer. Are these errors > > > due to > > > it being on USB or is the drive faulty? > > > What did you use to create the partition? The only thing that I have > found > > that works properly is gdisk. > > I'd originally used KDE Partition Manager, but tried again with gdisk. > Still > getting the Block bitmap differences: . > > How is the disk mounted? If you're just using automount consider giving it a dedicated mount point with a fixed directory (ie /mnt/disk or similar) and telling mount what the filetype is. That said, I have seen this issue exactly using rsync and wrongly formatted 3Tb drives in a fixed backplane so I don't think it's the connectivity - but then again an external GPT disk could indicate a bug. Maybe try partitioning and formatting, disconnecting and reconnecting the drive and mounting it, which may show issues in dmesg or syslog. s/
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