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SBS Backup Fails - No Disk

I administer two sbs2008 servers in different companies. Recently both of them have started having intermittent problems with the sbs backup. In both cases we have 2 usb drives which are changed weekly. What we are seeing is that sometimes the backup succeeds several times, and then part way through the week it fails because the drive cannot be found. In every case, the drive is still connected, but cannot be seen in the Disk Management window.

Is this a common problem?
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TownTalk
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TownTalk
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David AtkinIT ProfessionalCommented:
How do you resolve the problem?  Do you scan for new hardware or get the customer to reconnect the drive?

Any disk errors in the event logs?

Also, what drives are they? - Do they have their own power or not?
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TownTalkAuthor Commented:
These drives get their power from the USB. In one company the drives are 4 years old, in the other company the drives are 2 years old. The only way we've been able to resolve the problem is to unplug the drive and immediately reconnect it.

When I filter the system event log for Disk errors, I'm finding numerous event 7 being logged. "The device, \Device\Harddisk1\DR2, has a bad block."

I panicked at first because I thought that harddisk1 is the c: drive, but now I understand that DR2 refers to a removable drive?
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David AtkinIT ProfessionalCommented:
Have a look in device manager and confirm if the removable drive is Drive 2.  If so then yes it could be a bad drive.  I would suggest doing a chkdsk on the drive and see if it can be repaired.

Its worth reminding the customer to treat the drives with care as well.  I was horrified once to see a client throw one of their backup drives into the boot of their car like a coat or something.
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TownTalkAuthor Commented:
I had a look in Device Manager. The drive is listed there (because I re-connected it). I cannot find anywhere that shows which volume it is. Nor can a find a means of doing a chkdsk on it. Presumably this is because it does not have a physical drive letter when it is designated as being part of a backup set.
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David AtkinIT ProfessionalCommented:
Sorry I said device manager when I meant Disk Management.
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TownTalkAuthor Commented:
Ah yes ok. So in Disk Management I still couldn't find anything to identify the drive in the format used in the Event Log. But I did find the option to check it. So in the Tools section, there is a button which says 'Check Now...' When I click the button, it appears to operate, but nothing happens.

Sorry this is dragging on a bit.
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David AtkinIT ProfessionalCommented:
When you say nothing happens?  Does it run through the dskchk ok or does it just close?
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TownTalkAuthor Commented:
I click the button, I can see that the button depresses and comes back up. Nothing else happens.
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David AtkinIT ProfessionalCommented:
Sounds a little strange, you can try and do it by command or on another PC instead. Either way I would look at replacing the USB drives tbh.
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TownTalkAuthor Commented:
I found out why it wouldn't start checking the drive. It was because NTBackup removes the drive letter. I manually added a drive letter in Disk Management, and now it started to check the drive when I clicked the button.

But I think that you are correct to suggest that the drives should be replaced. I will get that organised. Thanks for your help today :)
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