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Server backups failing - how do I scandisk a backup drive?


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Ok, I realize Scandisk probably isn't what I want, but that's along the lines of what I was thinking..

 

So I've got a WS2012R2E server (TS140 12g) running 1 (500g) main drive, 1 (2tb) extra drive, and 1 (2tb) "backup drive" that's in a USB3 dock.  Backups have been running twice a day for months no problem, but I just realized that a few weeks ago, the backups started failing.

 

So, I go into Dashboard > Devices > server properties and I see all the Unsuccessful backups...  The error message I'm seeing is is "An error occurred while writing to the backup target."   What do I check first?  My first thought was to scan the disk for errors, but it's not a drive letter, so I'm not sure how.

 

I'm not sure where to start troubleshooting errors on a dedicated backup drive.   help?

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SpinRite would be a good tool to have in your toolbox.  It's not free but it does work.  How large of a drive are you using?

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I think you can give it a drive letter manually but be sure to remove it after re: cryptolocker etc...

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SpinRite would be a good tool to have in your toolbox.  It's not free but it does work.  How large of a drive are you using?

I have spinrite.   All my machines fail to scan any 2tb drives, so I didn't even consider it.

 

I also have MHDD, but it also requires a dedicated machine to run (uses timing, so no multitasking) ... I guess I could pull out an old box and run it...  ugh.

 

Would Stablebit Scanner actually repair a drive?  or does it just scan and report errors?

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Don't know about StableBit.  Will have to wait until our resident StableBit expert checks in.

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1. Add a different disk to the external drive and see if it will manually start a backup. (You must first add that disk to the system backup list).

2. If that doesn't work then plug the external USB into another computer and see if it works.

 

I find my external USB backup gives errors when it gets pretty full. I put a second disk in and wipe the first one. ( I know I should be alternating disks and keeping one offsite.)

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Ok, I realize Scandisk probably isn't what I want, but that's along the lines of what I was thinking..

 

So I've got a WS2012R2E server (TS140 12g) running 1 (500g) main drive, 1 (2tb) extra drive, and 1 (2tb) "backup drive" that's in a USB3 dock.  Backups have been running twice a day for months no problem, but I just realized that a few weeks ago, the backups started failing.

 

So, I go into Dashboard > Devices > server properties and I see all the Unsuccessful backups...  The error message I'm seeing is is "An error occurred while writing to the backup target."   What do I check first?  My first thought was to scan the disk for errors, but it's not a drive letter, so I'm not sure how.

 

I'm not sure where to start troubleshooting errors on a dedicated backup drive.   help?

Run "cmd /k mountvol"

 

Figure out which disk is the server backup drive (eg, the one without a letter).

 

Then run "chkdsk \\?\Volume{xxxxxx} /f", where the \\?\Volume stuff is the disk in question.

 

Alternative, use Disk Management (diskmgmt.msc) to assign a drive letter to the disk, and then run chkdsk that way.

I have spinrite.   All my machines fail to scan any 2tb drives, so I didn't even consider it.

 

I also have MHDD, but it also requires a dedicated machine to run (uses timing, so no multitasking) ... I guess I could pull out an old box and run it...  ugh.

 

Would Stablebit Scanner actually repair a drive?  or does it just scan and report errors?

As for StableBit Scanner ... it depends.

 

The surface scan doesn't repair (it's a requested feature, and ... a very complicated one to do write, eg without destroying your data).

However, the file system scan is a simple "chkdsk" command initiated via Windows API.  This is done monthly as part of the disk scan, and done in a read only manner.  If it detects file system damage, it will report that and prompt you to fix the file system. This runs a normal chkdsk pass on the volume (eg "chkdsk x: /f") and that can fix the disk.

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I managed to get a CHKDSK on the backup drive, and now I've gotten a successful backup run..  Finally.

 

Question - if the server grows larger than a single backup drive can handle, does WSB ask for more drives during the backup process?  

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Depends on what you mean.  

 

Generally, if it runs out of space on the drive, it will just start pruning older backups, to make space.

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I mean, if my backup drive is a 2tb drive, and I expand the server to over 4 or 5 actual used TB, what happens when I try to do a full backup?  and what happens with subsequent backups?

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