Tape Library Support for HyperScale X Reference Architecture

Updated

Tape libraries are supported in HyperScale X using the RedHat Enterprise Linux native st and pass through sg inbox drivers for data transfer to tape drives, and the ch inbox driver for the medium changer.

Note: If tape type devices are zoned to FC cards, it is a best practice for tape and disk FC traffic to be separated by at least different physical FC ports. Ideally, disk and tape should be on different HBA's or if using a 4 port HBA; ports 0 and 1 can be tape, and ports 2 and 3 can be disk, or vice versa.

Obtaining the Device Drivers for IBM Drives

For IBM drives, the lin_tape device driver package must be custom built specifically for the nodes provided to you.

  • Contact Commvault Customer Support to escalate the ticket to Commvault development team, to build and provide the specific lin_tape device driver package. Make sure to include the current Linux kernel version in your HyperScale nodes when making the request.

  • Once the package is provided to you, follow the procedure described in Using a Linux Tape Device Driver (starting from step3 ) to install the driver.

Note: Linux tape, or lin_tape driver packages should not be confused with lin_taped daemon which is currently not supported on any Commvault Linux MediaAgents, including HyperScale.

Updating the Linux Tape Driver During OS Upgrade

The Linux Tape (lin_tape) device driver is built specifically for the running kernel version. When the kernel associated with OS is upgraded, the corresponding lin_tape driver must also be rebuilt and upgraded to prevent issues from occurring.

To update the lin_tape driver complete the following steps:

  1. Stop all media management activity to the library and clear all the reservation types.

  2. Unload all the drives.

  3. Obtain the latest version of the lin_tape drive from customer support.

    The latest version of lin_tape driver must match the new kernel version of the operating system that you want to upgrade to.

  4. Remove the existing lin_tape driver using the following command:

    rpm -e <lin_tape driver version>
  5. Upgrade the operating system and reboot the nodes.

  6. After the nodes are back online and the new kernel is loaded and running, install the new lin_tape driver using the following command:

    rpm -ivh <lin_tape driver version>