Dell 0TK131 Rev. A01 Drive Does Not Load the Tape Cartridge, AND other LEDs are, Then

Red Hat Linux Operating System Environments

The tape driver for Red Hat Linux, called st, is included as part of the Red Hat Linux operating system.

When Red Hat Linux starts, the operating system recognizes the tape drive and automatically configures it as a device in the /dev directory. If it is the first tape device in the /dev directory, the tape drive is known as:

/dev/st0 or /dev/nst0.

There are various ways to view the log files to see whether Linux recognizes the tape drive:

•One method is to open a terminal window and issue the following command from the root directory:

dmesg grep SAS

This command produces an output similar to:

SCSI0:LSI Logic SAS based MegaRAID driver

•Another method might be to use the command:

cat /proc/scsi/scsi

This command produces an output similar to:

Host: scsi0 Channel: 0 Id:6 Lun:00

Vendor: Quantum Model: ULTRIUM 4 Rev: 2074

Type: Sequential-Access ANSI SCSI revision 04

•You can also use a text editor to view the messages in the file /var/log/ and look for tape drive entries.

•Sometimes a system can have multiple tape device names in the /dev directory and will not know which st number to use. To view the st device number for your attached tape drive, use the command:

dmesg grep tape

This command produces an output similar to:

st 1:0:0:0: Attached SCSI tape st0

Drive Does Not Load the Tape Cartridge

If you cannot load a tape cartridge into the PowerVault LTO-4-120 Half-Height tape drive:

1. Verify that the two-color status LED is green and the seven-segment LED is off/blank.

IF the two-color status LED is . . .	AND other LEDs are . . .	THEN . . .
off,	off/blank,	refer to the procedures for troubleshooting power problems
		under Computer Hardware Does Not Recognize the Tape Drive
		to determine why the green status LED is not on.
green,	on or flashing,	see Table 4-1 to determine whether the other LED activity is
		normal or abnormal. Then proceed to step 2 of this procedure.
		If the seven-segment LED displays the number "4" or "5" to
		indicate a Power On Self Test error, contact Technical Support
		to resolve the possible problem with the tape drive.
green,	off/blank,	skip to step 3 of this procedure.

2.If other LEDs are on, reset the tape drive by pressing and holding the eject button on the front panel for more than 5 seconds and releasing it.

3.Verify that the tape drive passes the Power On Self Test by viewing the front panel activity (see Figure 4-1 and Table 4-1).

If the two-color status LED is flashing amber and the seven-segment LED displays the number "4" or "5" to indicate a Power On Self Test error, contact Technical Support to resolve the possible problem with the tape drive.

4.If the two-color status LED is green and the other indicators are off/blank and you still cannot load a tape cartridge into the tape drive, examine the tape and the inside of the tape drive.

¡Verify that:

nThere are no tape labels interfering with tape insertion.

nTape labels are only on proper tape surfaces, and that labels are flat and not curled.

nThe tape drive opening is free of debris and tape labels.

nThe tape pin and tape are fully within the cartridge.

¡If you are inserting a cleaning cartridge, verify that the cleaning tape:

nIs valid. The tape drive ejects unsupported cleaning tapes.

nHas not expired. See Table 4-1 for Expired cleaning cartridge detected .