OnStream DI-30

From Gentoo Linux Wiki

1 OnStream DI-30

[edit] OnStream DI-30

The OnStream DI-30 is an streamer connected via the USB port. It should more or less work out of the box an the steps to do are very minimal. This tutorial will show you how to install the device but will not focus on backup strategies.

[edit] Installation

Installation is straight forward. Plug it in and check dmesg output.

Code: part of the dmesg output

usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
scsi 2:0:0:0: Sequential-Access OnStream DI-30            1.08 PQ: 0 ANSI: 2
usb-storage: device scan complete

You need to have the line

scsi 2:0:0:0: Sequential-Access OnStream DI-30            1.08 PQ: 0 ANSI: 2

If you get it, all is fine for the next steps.

[edit] Kernel requirements

You need

 Device Drivers  --->
  SCSI device support  --->
   SCSI tape support

and

 Device Drivers  --->
  SCSI device support  --->
   SCSI OnStream SC-x0 tape support

and

 Device Drivers  --->
  ATA/ATAPI/MFM/RLL support  --->
   SCSI emulation support

I recommend compiling all these as modules, so you can simply use them without restarting your system. Just load the modules using:

Code: load modules

modprobe ide-scsi
modprobe osst

I powered off the device to check if dmesg output showed me osst:

Code: part of the dmesg output

usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
scsi 2:0:0:0: Sequential-Access OnStream DI-30            1.08 PQ: 0 ANSI: 2
osst 2:0:0:0: osst :I: Attached OnStream DI-30 tape as osst0
osst 2:0:0:0: Attached scsi generic sg0 type 1
usb-storage: device scan complete

You can see your device is listed as osst0 and sg0 in /dev

Code: ll /dev/sg0 /dev/osst0

crw-rw---- 1 root tape 206, 0 18. Apr 12:05 /dev/osst0
crw-rw---- 1 root root  21, 0 18. Apr 12:05 /dev/sg0

[edit] Userspace requirements

You need a program to use the streamer/tape. To get a simple commandline tool just type:

Code: install mt-st

emerge mt-st -va

mt-st always expects the streamer/tape to be located at /dev/tape. OSST numbers the devices in /dev/osstX. So you need to provide a symlink:

Code: symlink for mt-st

ln -s /dev/osst0 /dev/tape		Rewinding device
ln -s /dev/nosst0 /dev/ntape		Non-rewinding device

Now you can run mt with it's various commands, like:

Code: mt status

OnStream SC-, DI-, DP-, or USB tape drive:
File number=0, block number=0.
Tape block size 512 bytes. Density code 0x40 (DLT1 40 GB, or Ultrium).
Soft error count since last status=0
General status bits on (41010000):
 BOT ONLINE IM_REP_EN