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basic RAID5 recovery question [SOLVED]

Posted: Fri Oct 18, 2024 7:00 pm
by skypickle
I read the manual here:

https://www.r-studio.com/Unformat_Help/ ... raids.html

Step 1 is fine, it creates 'virtual block raid 1'
over in the raid parameters panel the only choice in the dropdown is raid0. Raid5 is grayed out.

Still, I forged ahead and inserted the first hard drive of my 5 drive RAID5 array into a usb dock.
After a little while, I heard the windows sound of a new usb device but nothing showed up under 'device/disk' in R-studio.
I clicked refresh and (not responding) appeared in the title bar of R-studio and after 2 minutes this appeared

ASMT ASM1156-PM 0
HarddiskVolume29
HarddiskVolume30
HarddiskVolume31

I clicked on virtual block raid 1 to get the panel in the right pane.
I dragged HarddiskVolume29 and it appeared
I dragged HarddiskVolume30 and after a delay this appeared in the log:

Severity Type Date Time Message
----------------------------------------------------------------------------------------------------

Error OS I/O error 10/18/2024 7:44:31 PM Sector 0 failed to read from after 2 attempts. Not enough RAID drives to perform I/O
Error OS I/O error 10/18/2024 7:44:31 PM Sector 1 failed to read from after 2 attempts. Not enough RAID drives to perform I/O
Error OS I/O error 10/18/2024 7:44:45 PM Sector 8388607 failed to read from after 2 attempts. Internal error (error #0:0)
Error OS I/O error 10/18/2024 7:44:53 PM Sector 8388600 failed to read from after 2 attempts. Internal error (error #0:0)
Error OS I/O error 10/18/2024 7:44:53 PM Sector 0 failed to read from after 2 attempts. Not enough RAID drives to perform I/O
Error OS I/O error 10/18/2024 7:44:53 PM Sector 1 failed to read from after 2 attempts. Not enough RAID drives to perform I/O
Error OS I/O error 10/18/2024 7:45:01 PM Sector 8388607 failed to read from after 2 attempts. Internal error (error #0:0)
Error OS I/O error 10/18/2024 7:45:09 PM Sector 8388600 failed to read from after 2 attempts. Internal error (error #0:0)

I dragged HarddiskVolume31 and after a delay this also appeared in the log:

Error OS I/O error 10/18/2024 7:48:00 PM Sector 0 failed to read from after 2 attempts. Not enough RAID drives to perform I/O
Error OS I/O error 10/18/2024 7:48:00 PM Sector 1 failed to read from after 2 attempts. Not enough RAID drives to perform I/O
Error OS I/O error 10/18/2024 7:48:14 PM Sector 35134154879 failed to read from after 2 attempts. Internal error (error #0:0)
Error OS I/O error 10/18/2024 7:48:22 PM Sector 35134154872 failed to read from after 2 attempts. Internal error (error #0:0)
Error OS I/O error 10/18/2024 7:48:22 PM Sector 0 failed to read from after 2 attempts. Not enough RAID drives to perform I/O
Error OS I/O error 10/18/2024 7:48:22 PM Sector 1 failed to read from after 2 attempts. Not enough RAID drives to perform I/O
Error OS I/O error 10/18/2024 7:48:30 PM Sector 35134154879 failed to read from after 2 attempts. Internal error (error #0:0)
Error OS I/O error 10/18/2024 7:48:38 PM Sector 35134154872 failed to read from after 2 attempts. Internal error (error #0:0)

Now I CAN change the RAID type to RAID5 in the dropdown.
Am I on the right track? Will I ever be able to see a directory of the files on this array?
Obviously I can keep going, changing the hard drive in the usb dock as I go through my individual drives from my RAID5 array.

However, I would prefer to use images of the volumes (as multiple sources suggest) to prevent data loss from the failing drives.
I select HarddiskVolume29 but the create image button remains grayed out. I tried right clicking and using 'copy' but nothing happens.
how can image this drive?

Also, is there a way to 'save' the virtual block raid 1 object so I dont have to recreate it every time I want to work on this problem?

Re: basic RAID5 recovery question

Posted: Fri Oct 18, 2024 7:12 pm
by skypickle
welll i found out that this drive is actually the bad one in my array. Restarting R studio and reinserting the drive allowed me to create images of each of the three volumes (but for some reason the volume numbers keep incrementing)

I get three files each of which is only 2kb
HarddiskVolume32.rdr
HarddiskVolume33.rdr
HarddiskVolume34.rdr

The actual volumes are much bigger (see attached pic)
Untitled.jpg
How can these be images of volumes??

Re: basic RAID5 recovery question [solved]

Posted: Sat Oct 19, 2024 9:37 am
by skypickle
after some reading, I realized that these 2 kb files are aborted attempts at imaging. Obviously the disk could not be read.
I wish there were a way to find out which files the bad sectors belonged to.
I could then ignore those sectors from imaging (possible?)
and know which files are corrupt.