Article: 4130502

Scope

For Replay 4.4 and below only.

Problem

Snapshots fail at the end of transfer with one of the following error messages:

“Transfer failed on volume C:  Epoch XX Target: SERVERNAME Port:8001 – Unspecified Error”

or

“Target had an error at the end of the file transfer; file transfer aborted – the parameter is incorrect”

Description

Hard disk storage devices organize available space in units called ’sectors’.  Disks read and write data in whole sectors only. Most disks still use 512 byte sectors, however some newer enterprise-class storage devices use larger sectors sizes, up to 4KB per sector or larger. To achieve maximum performance, Replay performs disk I/O assuming disks use a 512 byte sector size.  On disks with a larger sector size, Replay may fail during a transfer.

The first step is to check the sector sizes on the Replay Core repository volumes:

1. Start Menu, RUN MSINFO32.

2. Expand Components.

3. Expand Storage.

4. Click on Disks.

5. Look for Bytes/Sector.  If this value is higher than 512, please follow instructions below.

6. From the Replay Admin console, force a snapshot.  If the problem persists, please perform the same operation on the Replay Agent for the volumes you are protecting.

Solution

1. Create a new DWORD registry value EnableBufferedIoWorkAround under HKLM\Software\AppAssure\ReplayEPS\ and set the value to 1.

2. Restart the Replay Service.