NetVault 13.0 - Administration Guide

If you require /dev/raw/raw1 and /dev/raw/raw2, follow the same procedure using the proper numbers listed in the devices.txt file and set the same permissions.

Set up raw I/O on Red Hat Linux

The following example shows how to set up raw I/O on Red Hat Linux. The raw partition used is /dev/sda.

Calculate the number of 4096-byte pages in this partition, as shown in the following example:

fdisk /dev/sda

Disk /dev/sda: 255 heads, 63 sectors, 1106 cylinders

Units = cylinders of 16065 * 512 bytes

num_pages = floor( ((1106-524+1)*16065*512)/4096 )

num_pages = 11170736

Bind an unused raw device node to this partition. Binding is required each time the machine is rebooted. You must be logged in as root to run this command:

raw /dev/raw/raw1 /dev/sda

For persistent binding, open the /etc/sysconfig/rawdevices file and append the following line:

dev/raw/raw1 /dev/sda

Restart the system or type the following command:

/etc/rc.d/init.d/rawdevices start

Set appropriate read permissions on the raw device controller and the disk partition. Set appropriate read and write permissions on the raw device.

Set up raw I/O on Red Hat Enterprise Linux 5 or greater

The raw devices interface has been deprecated in Red Hat Enterprise Linux 5; the raw device mapping is now performed using udev rules. To correctly map the raw device, add the appropriate entries to the /etc/udev/rules.d/60‑raw.rules file in the following format:

•

For device names:

ACTION=="add", KERNEL=="<device name>", RUN+="/bin/raw /dev/raw/rawX %N"

•

For major or minor numbers:

ACTION=="add", ENV{MAJOR}=="A", ENV{MINOR}=="B", RUN+="/bin/raw /dev/raw/rawX %M %m"

Here <device name> is the name of the device that you want to bind (for example, /dev/sda1), A and B are the major or minor numbers of the device you want to bind, and X is the raw device number that you want the system to use.

If you have a large pre-existing /etc/sysconfig/rawdevices file, convert it using the following script.

#!/bin/sh

grep -v "^ *#" /etc/sysconfig/rawdevices | grep -v "^$" |

while read dev major minor;

if [-z “$minor”]; then

echo “ACTION==\”add\”, KERNEL==\”${major##/dev/}\”,

RUN+=\\”/bin/raw $dev%N\"“

else

echo “ACTION==\”add\”, ENV{MAJOR}==\”$major\”,

ENV{MINOR}==\”$minor\”, RUN+=\\”/

bin/raw $dev%M%m\”$dev%M%m\””

done

Set up raw I/O on SUSE Linux

On SUSE Linux, administer the raw disk partitions in the /etc/raw file. This plain text file contains comments and examples for possible configurations. After creating the raw devices, bind the raw devices by starting them with the script /etc/init.d/raw. Use the chkconfig(8) utility to ensure that the raw device binding occurs after any restart.

Creating and adding an SVTL

You can use the configuration wizard to create and add an SVTL. When creating an SVTL, you can choose the number of virtual tape drives and slots, and specify the media capacity. After the device is created, you can assign the drives to different clients or share the drives with multiple clients.

To create an SVTL:

In the Navigation pane, click Guided Configuration, and then on the NetVault Configuration Wizard page, click Add Storage Devices.

— or —

In the Navigation pane, click Manage Devices, and then click Add Device.

On the Add Storage Devices page, select the Shared virtual tape library option, and click Next.

In the list of NetVault machines, select the machine on which you want to create the device, and click Next.

On the Add Shared virtual tape library page, provide the following details.

Option

Description

Library Device

Select the target drive. Depending on the operating system, the list includes the following items:

•

Windows: PhysicalDrive1, PhysicalDrive2, and so on

•

Linux: /dev/raw/raw1, /dev/raw/raw2, and so on

•

Solaris: /dev/rdsk/c0t0d0s0, /dev/rdsk/c1t1d0s0, and so on

Device Description

Displays the disk type.

Device Size

Displays the disk size.

Device Block Size

Displays the block size.

Previously Formatted as SVTL?

Indicates whether the selected disk was previously formatted as an SVTL.

Barcode Prefix

The NetVault Server automatically generates a barcode prefix and assigns it to the media used by the device. If you want to change it, type a unique code for the device.

Number of Drives

Type or select the number of drives for the SVTL. The number of drives can be more than the number of NetVault Clients currently connected to the disk. The additional drives can be used in future to connect more clients.

Number of Media Items

Type or select the total number of slots that hold the media.

Media Capacity

Type or select the media size. The media size is specified in MiB.

When creating an SVTL, NetVault uses a few megabytes of space to store some information about the SVTL on the disk. Take this requirement into consideration when you configure the media capacity.

To determine the disk space requirements for the SVTL, click Calculate Size Required. If the required disk size is larger than the actual disk size, reduce the Media Items and Media Capacity.

Click OK.

To create an SVTL, NetVault formats the specified disk. To complete this step, provide the following details:

•

Password: Type the NetVault password for the server.

•

Confirmation Phrase: Type the text FORMAT SVTL.

Click Format to format the disk and create the SVTL.

After the SVTL is created, and the tape drives are automatically discovered and assigned to the appropriate storage bays, a message is displayed.

You can use this default configuration if all drives are to be controlled by the client selected in Step 3. In this case, click Add Library. Information message appears. Close the message to exit the configuration wizard.

To assign the drives to different clients or to share the drive with multiple clients, click Add Drives Manually, and complete the following steps:

In the Choose Machine table, select the client to which the drive is attached. If the device is connected to multiple clients, select any one client. Click Next to scan the selected client and list the attached devices.


	NOTE: To skip any bay and configure the next bay, click Leave bay empty.

In the Choose drive for bay table, select the device that you want to add, and click Next.

If the device is connected to multiple clients (for example, in a SAN setup), all host clients are listed in the Choose Machines table. To share the drive with multiple clients, select the additional clients in the Choose Machines table, and click Next.

After the drive is successfully assigned to the selected clients, a message is displayed.

To assign additional drives for the library, click Add more devices, and repeat Step a through Step c.

If you do not want to add any other drives, exit the configuration wizard.

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NetVault 13.0 - Administration Guide

About Shared Virtual Tape Libraries

SVTL considerations

SVTL prerequisites

Creating and adding an SVTL