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Cannot Access AS-604T Path not found

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Cannot Access AS-604T Path not found

Postby deepthought » Wed Jun 06, 2018 7:45 am

Hello,
I've just joined in the hope of getting some idea as to what is going on with my AS-604T. I have four disks, 3 in a Raid 5 Array with one faulty disk in drive one but I don't think it has failed catastrophically. I am able to login online but cannot update the firmware or access any of the files or my data although I can see the root file names. The system status LED is dark red. All the hard drives LEDs are green although as they are no longer accessible I guess that’s irrelevant. The fourth drive was set up as an archive and I cannot see that at all? It just says Volume 1 is inaccessible. Any help would be appreciated. Thanks
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Re: Cannot Access AS-604T Path not found

Postby orion » Wed Jun 06, 2018 10:03 am

I guess that there are 2 disk errors happened in your RAID-5 volume. If you can login to NAS system, you can check files "/proc/mdstat" and dump system kernel messages by "dmesg". There should be detailed clues.
Oh, by the way, NAS OS should be mirroring to all of disks. That's why you can access ADM web UI to get volume status (inaccessible).
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Re: Cannot Access AS-604T Path not found

Postby deepthought » Wed Jun 06, 2018 7:35 pm

Thanks for the reply, I was certain the 4th disk wasn’t included in the volume but it says Volume 1 "raid level 5, disk 1,2,3,4". I can login to the NAS system with ssh but haven't managed to dump the Kernel messages. I was hoping that I could recover the volume and have raid rebuild it. On the storage manager ap, the only option is to "remove" the volume, create, management and spare are all inaccessible button options. How can I rebuild the volume? Stupidly, It does have a portion of data that I haven't backed up anywhere else, so I have 4 x 3TB drives that I can't use until I recover it. Looking at the log, in system info, it appears the only error is a media error with disk one. I have a feeling that something more is happening than a drive 1 failure? The fault occurred sometime after I allowed my significant other to back up her photos from her phone to the NAS but that may have just been the final straw that tipped the drive to finally conk out. I also had a windows 10 update on my laptop around the same time. Windows gives me Error 0x80070035 ‘the network path was not found’. Whereas Ubuntu just can’t see the NAS at all. Thanks again.
you can check files "/proc/mdstat"

Code: Select all
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md126 : active raid1 sdb3[6] sda3[4] sdc3[5] sdd3[7]
      2096064 blocks super 1.2 [4/4] [UUUU]

md0 : active raid1 sdc2[5]
      2096064 blocks super 1.2 [4/1] [__U_]

unused devices: <none>
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Re: Cannot Access AS-604T Path not found

Postby orion » Thu Jun 07, 2018 11:52 am

You can try to assemble md device to get data back if disks are working fine. Here is the command to get information about raid volumes.
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mdadm --examine /dev/sd?4

The same "Array UUID" means that those disks should be on the same raid volume. You can try the command to assemble it.
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mdadm --assemble /dev/md1 <the device list of your RAID-5 disks>

You can mount /dev/md1 if you get successful result on the previous command.

EDIT: You'd better to send a support request to asustor in case that you cannot recover it manually. https://support.asustor.com/
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Re: Cannot Access AS-604T Path not found

Postby deepthought » Sat Jun 09, 2018 12:47 am

Code: Select all
admin@?:/ $ sudo mdadm --detail /dev/md0
/dev/md0:
        Version : 1.2
  Creation Time : Sat Jul 25 12:07:53 2015
     Raid Level : raid1
     Array Size : 2096064 (2047.28 MiB 2146.37 MB)
  Used Dev Size : 2096064 (2047.28 MiB 2146.37 MB)
   Raid Devices : 4
  Total Devices : 2
    Persistence : Superblock is persistent

    Update Time : Fri Jun  8 17:29:04 2018
          State : clean, degraded
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           Name : AS-604T-5912:0
           UUID : 78589744:ee6237fb:b2b77070:941d3984
         Events : 101701

    Number   Major   Minor   RaidDevice State
       4       8       49        0      active sync   /dev/sdd1
       2       0        0        2      removed
       5       8       34        2      active sync   /dev/sdc2
       6       0        0        6      removed
admin@?:/ $


It says Raid level 1. I was thinking of trying to add another disk as a spare, so 4 disks in total.https://www.digitalocean.com/community/tutorials/how-to-manage-raid-arrays-with-mdadm-on-ubuntu-16-04 I understand that it should begin to rebuild itself with the new spare but if it's raid 1 then I'm up the creek aren't I? I still don't understand why I can't access the archive volume which was in bay 4 or add a spare disk to volume 1 using the button on the online console? Thanks again..
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Re: Cannot Access AS-604T Path not found

Postby orion » Mon Jun 11, 2018 10:16 am

"md0" should be volume 0 which is used by ADM OS. If you don't know how to use mdadm, it will be too complex for you to recover it by yourselves. Sending a support request to asustor is what you should do.
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