one more disk failure during re-building the Raid 5

[chrislai]

Hi,

Model:Buffalo TS-X8.0TL/R5
Firmware:1.61

I found the disk 4 is bad and then I put the new harddisk to re-build the Raid 5 (total:4 disk). However, it showing disk2 and 4 had issue now. and I check th log,,,the re-build progress should not completed. I only can access the web interface now..Please help.

Log:
Feb  5 15:25:07 HKSERVER61 errormon[1907]: Information situation detected! RAID         I18ARRAY1Rebuilding
Feb  5 15:25:11 HKSERVER61 kernelmon: lcd_error_man.sh array1_raid_error off(old error code)
Feb  5 15:25:12 HKSERVER61 kernelmon: lcd_error_man.sh disk1_broken_error(disk1_fault_error) off
Feb  5 15:25:15 HKSERVER61 linkstation: lcd_error_man.sh disk4_broken_error(disk4_fault_error) off
Feb  5 15:25:20 HKSERVER61 kernelmon: lcd_error_man.sh disk2_broken_error(disk2_fault_error) off
Feb  5 15:25:28 HKSERVER61 kernelmon: lcd_error_man.sh disk3_broken_error(disk3_fault_error) off
Feb  5 19:57:16 HKSERVER61 kernelmon: cmd=ioerr sdb READ 956880192 1
Feb  5 19:57:17 HKSERVER61 kernelmon: cmd=raiddegraded 2 8 22
Feb  5 19:57:17 HKSERVER61 kernelmon: DISK_NO=2 : DISK_STATUS=array1 : RAID_LEVEL=raid5
Feb  5 19:57:19 HKSERVER61 errormon[1907]: Information situation detected! OperationModeI12DEGRADE MODE
Feb  5 19:57:23 HKSERVER61 kernelmon: lcd_error_man.sh array1_raid_error on diag_on(old error code)
Feb  5 19:57:23 HKSERVER61 kernelmon: lcd_error_man.sh disk2_broken_error off(disk2_fault_error) on diag_on buzzer_long_on
Feb  5 19:57:23 HKSERVER61 errormon[1907]: Error situation detected! HD2 Broken   E30Replace the DISK
Feb  5 19:57:25 HKSERVER61 linkstation: *** fsaccesstest test /mnt/array1 fail. ***
Feb  5 19:57:29 HKSERVER61 errormon[1907]: Error situation detected! RAID ARRAY1  E14Can't Mount
Feb  5 19:57:36 HKSERVER61 hdd_remove: Disk(disk2) removed : Status (array1)
Feb  5 19:57:39 HKSERVER61 linkstation: lcd_error_man.sh array1_raid_error on diag_on buzzer_on(old error code)
Feb  5 19:57:40 HKSERVER61 linkstation: lcd_error_man.sh array2_raid_error off(old error code)
Feb  5 19:57:40 HKSERVER61 linkstation: lcd_error_man.sh disk1_broken_error(disk1_fault_error) off
Feb  5 19:57:44 HKSERVER61 linkstation: lcd_error_man.sh disk3_broken_error(disk3_fault_error) off
Feb  5 19:57:50 HKSERVER61 linkstation: lcd_error_man.sh disk4_broken_error(disk4_fault_error) on
Feb  5 19:57:51 HKSERVER61 errormon[1907]: Error situation detected! HD4 Broken   E30Replace the DISK

[davo]

Replace the 2 disks and delete/recreate the RAID, if you dont have a backup and you need the data then contact a data recovery company before doing this.

[chrislai]

I tried to use back the original disk 2 to rebuilt the same array1 ( no disk 4), and then the NAS only show the disk 4 broken.
Then, If I use back the disk 4 to slot 4, it will do the rebuilding , but will fail again after 3 hrs during rebuilding....

I will try to replace another new disk for slot 4.
I have a question:
Use the disk 2 to rebuilt the same array, this disk 2 data must be removed?
If slot 4 also rebuild success, all of the data can be retrieved?
I can retrieve few files after rebooted when the storage status is available.....but it will change back not available after few time.
How to stop it?

Thanks.

[davo]

"Error situation detected! RAID ARRAY1  E14Can't Mount"

The RAID has already failed according to this log entry. Data recovery may be the only option and anything you do may inhibit that process.

[Eastmarch]

Davo is correct, this will have to be restored from backup.