Dell Server Bad Sectors on HDD?

[jmak]

I have four Hyper-V VMs on a Dell T410 and the backup on one of them has failed - both scheduled and when run manually.

The error message says to run CHKDSK /R, which I've done and I get the following error:

 

Stage 4: Looking for bad clusters in user file data ...

Read failure with status 0xc0000185 at offset 0x2403ed000 for 0x10000 bytes.

A disk read error occurredc0000185

The disk does not have enough space to replace bad clusters

detected in file 127712 of name \Windows\INSTAL~1\afc2e2f8.msi.

 

This suggests a failing HDD (no surprise, since the server is 7.5 years old). This gives me two questions:

 

1) How critical is afc2e2f8.msi to a running server and could I just copy it from somewhere else (or an earlier successful backup)?

2) How do I find which disk is failing on the array (RAID 5) when it's a VHD? The host is running Hyper-V Server 2012R2 - so it'll either need to be in PowerShell or via RSAT - or possibly via a Dell utility.

 

Despite the error message saying that there's not enough space to replace the bad clusters, there's 21.9GB free of 44.4GB according to Windows.

 

The server appears to be running fine and I have recently been able to update and re-boot it.

 

Any assistance gratefully received.

 

PS: Yes this is a critical server (it's the only one we have). Yes, I pointed out that it was a bad idea to rely on a 7.5 year old server with no warranty. Yes, we have a new server on order, but it's not going in until the summer holiday....