external hard drive

Log Name: System
Source: disk
Date: 7/14/2015 7:04:33 PM
Event ID: 154
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: joe
Description:
The IO operation at logical block address 0x0 for Disk 1 (PDO name: \Device\0000004d) failed due to a hardware error.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="disk" />
<EventID Qualifiers="49156">154</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2015-07-14T23:04:33.005166800Z" />
<EventRecordID>6919</EventRecordID>
<Channel>System</Channel>
<Computer>joe</Computer>
<Security />
</System>
<EventData>
<Data>\Device\Harddisk1\DR2</Data>
<Data>0x0</Data>
<Data>1</Data>
<Data>\Device\0000004d</Data>
<Binary>0F01180004004000000000009A0004C000000000000000000000000000000000000000000000000000020428700004000000000A000000004400000000002D2D</Binary>
</EventData>
</Event>

Is your disk a 4k sector size disk? you can run the command “fsutil fsinfo ntfsinfo <drive letter>” in an elevated command prompt to see the results.