---
title: "Library Discovery Job Started"
description: "Sent when a user starts a library discovery job session. For more information, see Inventorying Tapes. Event ID: 125 Event message details: Tape Library Discovery job <JobName> has been started by user <UserName> Severity: Info"
canonical: "https://helpcenter.veeam.com/docs/vbr/events/event_125.html"
breadcrumb: "Event Reference > Backup > Tapes > Library Discovery Job Started"
dateModified: "2026-10-01"
---

# Library Discovery Job Started

Sent when a user starts a library discovery job session. For more information, see [Inventorying Tapes](https://helpcenter.veeam.com/docs/backup/vsphere/inventoring_tapes.html).

## General Information

**Event ID**: 125

**Event message details**: Tape Library Discovery job `<JobName>` has been started by user `<UserName>`

**Severity**: Info

## Parameters

<table class="Blue_Table">
  <tr style="vertical-align:top">
    <th>
      <p>Parameter Name</p>
    </th>
    <th>
      <p>Description</p>
    </th>
    <th>
      <p>Example</p>
    </th>
  </tr>
  <tr style="vertical-align:top">
    <td>
      <p><span class="T_Filenames">JobSessionID</span></p>
    </td>
    <td>
      <p>Job session ID.</p>
    </td>
    <td>
      <p><span class="T_Filenames">JobSessionID="85d54fa0-620f-42d0-8a56-ec9a87e858c2"</span></p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td>
      <p><span class="T_Filenames">JobID</span></p>
    </td>
    <td>
      <p>Job ID.</p>
    </td>
    <td>
      <p><span class="T_Filenames">JobID="4a9c5b19-283c-47a7-8179-103988a1aeec"</span></p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td>
      <p><span class="T_Filenames">JobType</span></p>
    </td>
    <td>
      <p>Job type.</p>
    </td>
    <td>
      <p><span class="T_Filenames">JobType="37"</span></p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td>
      <p><span class="T_Filenames">Platform</span></p>
    </td>
    <td>
      <p>Platform type.</p>
    </td>
    <td>
      <p><span class="T_Filenames">Platform="5"</span></p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td>
      <p><span class="T_Filenames">Flags</span></p>
    </td>
    <td>
      <p>Defines whether the job was started by a user.</p>
    </td>
    <td>
      <p><span class="T_Filenames">Flags="1"</span></p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td>
      <p><span class="T_Filenames">TargetObjectID</span></p>
    </td>
    <td>
      <p>Target object ID.</p>
    </td>
    <td>
      <p><span class="T_Filenames">TargetObjectID="00000000-0000-0000-0000-000000000000"</span></p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td>
      <p><span class="T_Filenames">VbrHostName</span></p>
    </td>
    <td>
      Backup server name. Can be a DNS name, an FQDN or an IP address.
    </td>
    <td>
      <p><span class="T_Filenames">VbrHostName="vbrsrv01.tech.local"</span></p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td>
      <p><span class="T_Filenames">VbrVersion</span></p>
    </td>
    <td>
      Veeam Backup & Replication version.
    </td>
    <td>
      <p><span class="T_Filenames">VbrVersion="13.1.0.411"</span></p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td>
      <p><span class="T_Filenames">Version</span></p>
    </td>
    <td>
      Event version (service parameter).
    </td>
    <td>
      <p><span class="T_Filenames">Version="1"</span></p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td>
      <p><span class="T_Filenames">Description</span></p>
    </td>
    <td>
      Event message details.
    </td>
    <td>
      <p><span class="T_Filenames">Description="Tape Library Discovery job 'Tape Library Discovery' has been started by user TECH\user1."</span></p>
    </td>
  </tr>
</table>

## Syslog Message Example

```
1 2026-07-25T11:16:32.762154+01:00 VBRSRV01 Veeam_MP - - [origin enterpriseId="31023"] [categoryId=0 instanceId=125 JobSessionID="85d54fa0-620f-42d0-8a56-ec9a87e858c2" JobID="4a9c5b19-283c-47a7-8179-103988a1aeec" JobType="37" Platform="5" Flags="1" TargetObjectID="00000000-0000-0000-0000-000000000000" VbrHostName="vbrsrv01.tech.local" VbrVersion="13.1.0.411" Version="1" Description="Tape Library Discovery job 'Tape Library Discovery' has been started by user TECH\user1."]
```