2. Get information about tape devices and tape drive bays

1. On your controller node, run detect -h from a Command Prompt window or terminal window. This displays file names and other information about all SCSI devices accessible by the controller node.

Note: The detect utility is found in the bin\JB subfolder under the main DPX installation folder.

The following is sample output from detect -h:

Note that the output is divided into three distinct parts. The horizontal lines between parts does not appear on your display. The three parts are:

a. Part 1 – SCSI device scan as presented by the operating system

b. Part 2 – DPX device identification with associated Unique ID

c. Part 3 – Tape library information gathered from reading the media changer device

1. From Part 1 of the detect -h output, identify the media changer device file and the tape drives. The following table lists common Device ID nomenclature:

   Operating System	Media Changer ID	First Storage Device ID
   Windows	\.\sync_sa0 or \.\Changer0	\.\Tape0
   Linux	/dev/sg0	/dev/nst0 or /dev/st0
   NetApp storage system		nrst0a
2. Note the Media Changer ID. This information is needed later when the library is added to the Enterprise.

3. If any tape drives are visible to both the NetApp storage system and the host nodes, which is the case if you used a SAN as recommended, run storage show tape from the NetApp storage system. a. Enter the following command from a Windows command shell or Linux terminal session: $ telnet ip_address The Data ONTAP login prompt appears. b. Log in as root. c. Enter the following command from the command prompt:

   > storage show tape The following is sample output for one device: Tape Drive: FPN[2007006069806960]:0.17

   Description: IBM ULT3580-TD1

   Serial Number: 4322103504

   World Wide Name: WWN[5:005:076300:05be01]

   Alias Name(s): st3

   Device State: available

4. Populate the worksheet below to note critical information about each tape drive. This information is needed later when the tape devices are added to the Enterprise.

   	Device Number	Serial Number	Unique ID	Alias Name	Device Name
   Source:	from Part 3 of detect -h	from Part 3 of detect -h	from Part 2 of detect -h	from 'storage show tape'	user defined
   Notes:	This is the numeric digit that appears after "TAPE_DRIVE"		The end of the Unique ID MUST correspond to the Serial Number in column 2 of this table	The serial number of this device MUST correspond to the Serial Number in column 2 of this table	This is a logical name for referring to the device, up to 14 characters, no spaces
   Example:	0	4322103504	ULT3580-TD1 4322103504	st3	DPX00
   	0
   	1
   	2
   	3
   	4
   	5
   	6
   	7
   	8
   	9
   	10
   	11

Note. If there is no corresponding Serial Number, do not populate Unique ID and Alias Name in the above worksheet.