[fix-disk] umount: can't umount /mnt/hd2: Device or resource busy

[MymsMan]

I have acquired a single failed sector on the disk but it has reduced system response time to a crawl so I am attempting to run fix-disk but it is failing

Please select option: 1
Any additional options (or press return for none):
Are you sure you wish to run the hard disk checker? [Y/N] y
Running /bin/fix-disk
Custom firmware version 3.03


Checking disk sda

Partition /dev/sda1 is already unmounted
umount: can't umount /mnt/hd2: Device or resource busy

Press return to continue:

What can I do to get fix-dik to be able to unmount /mnt/hd2

 

[MymsMan]

ID     Name     Flags     Raw Value     Value     Worst     Threshold     Life Left     Notes
1     Raw_Read_Error_Rate     POSR--     202618320     089     088     006         -
3     Spin_Up_Time     PO----     0     097     097     000         -
4     Start_Stop_Count     -O--CK     8898     092     092     020     90%     -
5     Reallocated_Sector_Ct     PO--CK     0     100     100     036     100%     -
7     Seek_Error_Rate     POSR--     1143430498     090     060     030         -
9     Power_On_Hours     -O--CK     20281     077     077     000     77%     -
10     Spin_Retry_Count     PO--C-     0     100     100     097     100%     -
12     Power_Cycle_Count     -O--CK     4449     096     096     020     95%     -
184     End-to-End_Error     -O--CK     0     100     100     099         -
187     Reported_Uncorrect     -O--CK     2052     001     001     000         -
188     Command_Timeout     -O--CK     0     100     100     000         -
189     High_Fly_Writes     -O-RCK     0     100     100     000         -
190     Airflow_Temperature_Cel     -O---K     37     063 (37°C)     042 (58°C)     045 (55°C)         In_the_past
194     Temperature_Celsius     -O---K     37     037     058     000         -
195     Hardware_ECC_Recovered     -O-RC-     202618320     049     039     000         -
197     Current_Pending_Sector     -O--C-     1     100     100     000         -
198     Offline_Uncorrectable     ----C-     1     100     100     000         -
199     UDMA_CRC_Error_Count     -OSRCK     0     200     200     000         -
Self-test logs
No.     Description     Status     Remaining     When     First Error LBA
# 1     Short offline     Completed: read failure     90%     20281     676637060
# 2     Short offline     Completed: read failure     90%     20281     676637060
# 3     Short offline     Completed without error     00%     17504     -
# 4     Short offline     Completed: read failure     90%     17504     665332974
# 5     Short offline     Completed: read failure     90%     17502     665332974
# 6     Short offline     Completed: read failure     90%     17502     665332974
Rendered in: 0.921 seconds

 

[MymsMan]

I finally succeeded in getting fix-disk to work by using the Maintenance Mode option from the Webif diag panel instead of the Reboot to Maintenance Mode option from Telnet - not sure why there should be a difference.

The bad sector turned out to be in redring.log which would probably explain why there was a long hang every time a recording started or finished