Product Documentation
Abstract
AIX Support Center Tools
Content
The purpose of devscan is to make debugging storage problems faster and easier. Devscan does this by rapidly gathering a great deal of information about the Storage Area Network (SAN) and displaying it in an easy to understand manner. Devscan can be run from any AIX host, including VIO clients, or from a VIOS.
Benefits of devscan
The information devscan displays is gathered from the SAN itself or the device driver, not from ODM, with exceptions described in the man page. The data is therefore guaranteed to be current and correct.
In the default case, devscan is unable to change any state on the SAN or on the host, making it safe to run even in production environments. In all cases, devscan is safer to run than cfgmgr because it cannot change the ODM. Some of the optional commands devscan can use are able to cause a state change on the SAN. Details are provided in the man page.
Devscan can report a list of all available target devices and LUNs
For each LUN, devscan can report
- ODM name and status
- PVID, if there is one
- Device type
- Capacity and block size
- SCSI status
- Reservation status, both SCSI-2 and SCSI-3
- ALUA status
- Time to service a SCSI Read
| SUPPORT |
|---|
|
If you require more assistance, use the following step-by-step instructions to contact IBM to open a case for software with an active and valid support contract. 1. Document (or collect screen captures of) all symptoms, errors, and messages related to your issue. 2. Capture any logs or data relevant to the situation. 3. Contact IBM to open a case: -For electronic support, see the IBM Support Community: 4. Provide a clear, concise description of the issue. 5. If the system is accessible, collect a system snap, and upload all of the details and data for your case. - For guidance, see: Working with IBM AIX Support: Collecting snap data |
Related Information
Document Location
Worldwide
Was this topic helpful?
Document Information
Modified date:
14 October 2022
UID
aixtools1d507c1e