Enabling lun support in linux, Preparing the host and verifying the connection, Installing the device drivers – Dell PowerVault 124T User Manual
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Ethernet cable
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SAS cable
3
Power cable
6. Attach the female connector of the power cable to the power connector on the back panel of the autoloader.
7. Plug in the power cable to the nearest properly grounded power outlet.
8. Plug in the host server or workstation and all attached devices.
9. Turn on the autoloader by setting the power switch on the back panel to the ON position. Turn on any other devices you turned off earlier. Check the LCD screen to
make sure the autoloader is receiving power. If it is not, check the power connections and your power source.
During the Power-On Self-Test (POST), both LEDs are illuminated briefly, followed by only the Ready/Activity LED flashing. When the initialization sequence is complete,
the LCD screen displays the Home screen.
10. Turn on the server.
Preparing the Host and Verifying the Connection
If necessary, install a SAS host adapter, software, and compatible drivers. Refer to the manuals for the host computer and SAS host adapter for detailed instructions. In
addition, follow these general guidelines:
When the host server is powered on, install software, and/or drivers that are compatible with the autoloader (see "
Installing the Device Drivers
"). Software
compatibility information is available at
. Most backup software packages require an additional module to communicate with the autoloader robotics.
If the host server is connected to a network, check with the system administrator before turning off power.
Use proper procedures to prevent electrostatic discharge (ESD). Use wrist-grounding straps and anti-static mats when handling internal components.
Make sure that the host server has an open expansion slot.
Make sure that your backup application supports the SAS host adapter.
For Microsoft® Windows Server® 2003, verify the connection between the autoloader and host by going to Settings>Control Panel>System>Hardware>Device
Manager>Tape Drive and/or Media Changer. For more information on verifying the connection of SAS devices, consult the operating system documentation.
For Linux, verify the connection between the tape drive and host by going to Application>System Tools>Hardware Browser>Tape drives in RedHat Linux 4 and 5,
Media Changer should appear under Application>System Tools>Hardware Browser>System Devices. Another option is to run CLI ‘sg3_map –x’ which is available
when sg3util package is installed. Sg3_map will list attached SCSI devices. One more option available is to execute CLI ‘cat /proc/scsi/scsi’ to find out which SCSI
device is connected to which SCSI interface. For more information on verifying the connection of SAS devices, consult the operating system documentation.
Installing the Device Drivers
There are two device drivers associated with the Dell PowerVault 124T LTO6 SAS autoloader. One for the autoloader itself, and a second for the LTO6 SAS tape drive within
the autoloader. Updates for these drivers can be found at
NOTE: Most commercial backup applications provide all necessary device driver support. See the Dell Support website at
for a list of compatible
backup applications.
Enabling LUN Support in Linux
To verify the detection of a tape drive, administrators should check for its entry in /proc/scsi/scsi. Current versions of Linux may not scan the logical storage unit (LUN) ID of
every device. This can result in some PowerVault devices not being identified or listed in the /proc/scsi/scsi output. Administrators can follow these steps to enable
support for such devices.
1. Type cat /proc/scsi/scsi. The output will look similar to the following:
Attached devices:
Host: scsi3 Channel: 00 Id: 00 Lun: 00
Vendor: QUANTUM Model: ULTRIUM 4 Rev: xxxx
Type: Sequential-Access ANSI SCSI revision: 04
2. Identify the host adapter, channel number, target ID number, and LUN number for the first LUN of the device to be configured. In this example, the Certance Ultrium 2
(a drive in the PowerVault 124T) is shown at the address, or nexus, 3 0 0 0 — which means host adapter 3, channel number 0, ID 0, and LUN 0. The PowerVault 124T