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rescue videofiles on defect sectors?

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(@ffuchs)
Active Member

hi,

did you found a possibility to paste the old volume header onto our disks?

If I go the route recovery company: if the company has techniques to recover data from a (hardware) raid-volume, will this help with softraid too or is softraid completely different, so I need a recovery company, which has experience with softraid?
(please notice, we are in europe, not in US)

many thanks, ferdinand

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Topic starter Posted : 16/02/2021 7:38 am
(@softraid-support)
Member Admin

I do not have an answer yet, as there was engineering skepticism whether that would fix the problem for certain. SSD's are very difficult to recover data from. I will bring it up again to engineering.

You would need a company that has macOS experience and ability to work with SSD's (flash) and RAID also. It may be useful to contact SanDisk for recommendations for EU companies that are certified for SanDisk. Then find one with macOS expertise.

I will see if we can do anything also. There were many io errors on these disks, which are of unknown cause. depending on the cause, it may make recovery very difficult, i.e, if just directory damage, it is easier, than if the SSD's failed from a power brownout, or disk failure, or enclosure failure. 3 of the 4 disks show multiple errors.

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Posted : 16/02/2021 9:41 am
(@ruben-salazar)
Active Member

@softraid-support I have the same problem, or similar. A 4-bay Mercury With 3TB HDD disks in Raid 5. It doesn't mount since a degraded disk. The disk was replaced. It is compilating and pending of be mounted. But it doesn't work after hours. 

Maybe pasting the old volume header would work... Can I do it by myself? I have other enclosures if something is needed from them.

THANKS!

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Posted : 14/04/2021 6:04 pm
(@softraid-support)
Member Admin

@ruben-salazar

When a volume does not mount, do not try replacing disks. Attach a SoftRAID Tech Support file so I can take a look. Probably this is a directory issue, but I can get an idea from a support file.

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Posted : 14/04/2021 8:29 pm
(@ruben-salazar)
Active Member

@softraid-support Here you are! The 9TB RAID050 is the one that has the issue... THANKS!

 

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Posted : 15/04/2021 3:47 am
(@softraid-support)
Member Admin

@ruben-salazar

If you cannot mount the volume, the volume directory may have some damage that prevents it from mounting.

Was it mounting before you replaced the volume? Did it ever mount after you added the disk?

Do you have access to Disk Warrior?

I would remove the new disk and run Disk Warrior.

Then when the volume is mounting, add the disk back. It is not doing anything until the volume is mountable.

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Posted : 15/04/2021 9:20 am
(@ruben-salazar)
Active Member

@softraid-support The OWC was mounted and reading files -transcoding media- till the iMac crashed. After that never mounted again. One disk was shown as fail. After removing it the same with only 3 disks. A new disk was added, but no way to mount it. Checked with 5 XT and 6 XT.

 

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Posted : 15/04/2021 9:52 am
(@softraid-support)
Member Admin

@ruben-salazar

Thanks, this means the crash is what damaged the directory.

Disk Warrior is the best utility to repair your volume. It is not a SoftRAID issue, it is a directory issue. Unless Disk Utility "first aid" can repair this volume (i am pretty sure it cannot), Disk Warrior is your best option.

It is possible that the disk you removed is OK. It could have had an error during the crash, if for instance, the application you were using sent a read request that was not a real address. that can cause an IO error but not a disk error. There is no sign of the disk having multiple errors, or reallocated sectors, unreliable sectors, etc.

 

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Posted : 15/04/2021 10:39 am
(@ruben-salazar)
Active Member

@softraid-support DISK WARRIOR worked!! Thank you very much!!

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Posted : 16/04/2021 3:05 am
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