On Sun, August 12, 2012 1:14 pm, Camale�n wrote:
> On Sun, 12 Aug 2012 12:45:03 -0400, Tony Baldwin wrote:
>
>> Yesterday I had to reboot my machine. Cleaning house, I had dislodged
>> the plug for a power strip that powered the computer, monitor, and
>> printer.
>>
>> Now, I am seeing very odd behavior.
>
> (...)
>
>> The only anomalies I have noted in dmesg, etc., are that some sectors of
>> my hdd are not reading correctly, or something. A file system check
>> forced on a second reboot yesterday failed, which is disconcerting, but
>> I'm not certain what to make of that.
>>
>> dmesg | tail gives me
>> [79477.080607] ata6.00: failed command: READ DMA EXT
>> [79477.080621] ata6.00: cmd 25/00:08:9d:23:9f/00:00:6c:00:00/e0 tag 0
>> dma 4096 in
>> [79477.080624] res 51/40:00:9d:23:9f/40:00:6c:00:00/00 Emask
>> 0x9 (media error)
>> [79477.080631] ata6.00: status: { DRDY ERR }
>> [79477.080635] ata6.00: error: { UNC } [79477.196994] ata6.00:
>> configured for UDMA/33
>> [78506.185310] sd 5:0:0:0: [sda] Unhandled sense code
>> [78506.185315] sd 5:0:0:0: [sda] Result: hostbyte=DID_OK
>> driverbyte=DRIVER_SENSE
>> [78506.185322] sd 5:0:0:0: [sda] Sense Key : Medium Error [current]
>> [descriptor]
>> [78506.185331] Descriptor sense data with sense descriptors (in hex):
>> [78506.185335] 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
>> [78506.185351] 6c 9f 23 9d
>> [78506.185358] sd 5:0:0:0: [sda] Add. Sense: Unrecovered read error -
>> auto reallocate failed
>> [78506.185368] sd 5:0:0:0: [sda] CDB: Read(10): 28 00 6c 9f 23 9d 00 00
>> 08 00
>> [78506.185378] end_request: I/O error, dev sda, sector 1822368669
>> [78506.185398] ata6: EH complete
>>
>> I don't know what to make of that.
>
> (...)
>
> Wow! Just to prevent from a disaster, ensure you have a full and updated
> backup
> copy of your whole data. Then you can proceed with some basic tests:
>
> 1/ Check the cabling inside the computer, mainly sata cables, they could
> have been
> moved or be badly seated (ensure that all sata connectors are firmly
> tighten).
>
> 2/ Use sata quality cables when possible. For testing purposes, you can
> try with a
> different sata cable, at least for the device attached to ata6.00 port
> ("dmesg | grep -i ata6.00" will tell what's hanging there).
>
> 3/ Download the disk utilities from the hard disk manufacturer (which
> usually runs
> from an ISO livecd) and scan your hard disks for smart or another errors
> (always run
> soft/non-destructive tests).
>
> 4/ From a LiveCD, you can additionaly get the results from "smartcl" long
> test mode
> to compare with the results from step 3/.
>
> And provide the results of all these set of tests :-)
>
> Greetings,
>
> --
> Camaleón
>
I did a back-up moments after writing my initial message on this thread.
I rebooted to single-user mode and am running fsck -t ext3 /dev/sda6 right
now (/home partition, where the problem seems to be).
Oddly, I don't have a livecd on hand.
I did my most recent installations all from a usb stick.
(writing from another machine, a laptop with no optical drive to burn a cd).
./tony
--
http://tonybaldwin.me
all tony, all the time
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