[nSLUG] error deluge

George N. White III gnwiii at gmail.com
Sat May 16 18:46:58 ADT 2020


On Sat, 16 May 2020 at 15:23, Rory <rory at unixism.org> wrote:

> The {UNC} is not a good sign, stands for "Uncorrectable error" which
> implies a bad sector.
>
>
> https://ata.wiki.kernel.org/index.php/Libata_error_messages#ATA_error_expansion
>
> I'd recommend booting off of another disk, like a usb 'live' image, to
> see if all the important stuff is still readable from that disk. If so,
> then you can probably save most of your files and start on filesystem
> checks, repairs, etc.
>

Your priuority should be to get everything important copied to a new drive.
Attempting to repair a dying drive often makes things worse.  If you can't
get to your important files using a live boot disk, you may still be able
copy
the raw data to a new drive using GNU ddrescue.   Once the data have been
copied you can attempt to repair the damaged filesystem on the new disk.


>
> These things can be a result of random sector failures but in my
> experience once a desktop/laptop disk starts with these kinds of errors
> it's days are numbered.
>

Yes, and sometimes the numbering isn't in days but in hours.

>
> On Sat, 2020-05-16 at 15:08 -0300, tom_d at chebucto.ns.ca wrote:
> > booting Mint 19.3 Cinammon on deskset:
> >
> >
> > [3.986534] sd 7:0:0:0: [sdb] No Caching mode page found
> > [3.986583] sd 7:0:0:0: [sdb] Assuming drive cache: write through
> > [8.947967] ata1.00: exception Emask 0x0 SAct 0x38000 SErr 0x0 action
> > 0x0
> > [8.948019] ata1.00: irq_stat 0x40000001
> > [8.948063] ata1.00: failed command: READ FPDMA QUEUED
> > [8.948111] ata1.00: cmd 60/00:78:00:09:c0/0a:00:01:00:00/40 tag 15
> > ncq
> > dma 1310720 in
> > [8.948111] res 41/40:00:70:0a:c0/00:0a:01:00:00/00 Emask 0x409
> > (media
> > error)<F>
> > [8.948173] ata1.00: status {DRDY ERR}
> > [8.948216] ata1.00: error: {UNC}
> > [9.034677] blk_update_request: I/O error, dev sda, sector 29362800
> > op
> > 0x0:(READ) flags 0x80700 phys_seg 18 prio class 0
> >
> > this is so far over my head ...
> >
> > I am a user-level user, would happily drop this into a forum
> > somewhere, but all my user info is on the machine I can't get into
> > ...
> >
> > what to do ???
> >
> > _______________________________________________
> > nSLUG mailing list
> > nSLUG at nslug.ns.ca
> > http://nslug.ns.ca/mailman/listinfo/nslug
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-- 
George N. White III
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