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Scalar 24 Installation and Operation Guide 123

Drive Maintenance Test

Drive Maintenance allows you to perform several different drive diagnostic tests.

To better understand these tests, you need to understand the format of the tape. The tape is divided into

four data sections. Each data section contains 96 tracks (96*4=384 tracks, the number of tracks on a

generation one cartridge). On each edge of the tape (two servo bands), and between the databands (three

servo bands), there are pre-formatted servo bands (five in total). A wrap is defined as a trip from logical BOT

to logical EOT (a round trip would be two wraps).

Each test is described in more detail below.

3 When the test is complete, a completion

message is displayed. Press to

dismiss.

If the Self Test fails, there is probably

something obstructing motion of the picker.

Open the door and pull out the magazines to

verify that all the tapes are pushed into their

slots. Look for anything that appears to be

blocking the path of the picker. Retry the test.

If it still fails, contact technical support.

Note

The drive maintenance tests are only supported for libraries with LTO drives.

Note

Run time records the test time in minutes and seconds (m:ss).

Power on self test

(POST)

Runs self diagnostics. This test takes approximately one minute.

Fast Read/Write The drive reads and writes two wraps worth of data (a trip down and back) in

each of the four data sections. Ten data patterns are used in this test. No more

than 1.5% of the tape is used. This test takes approximately 25 minutes.

Normal Read/

Write

The drive reads and writes 96 wraps worth of data (all the tracks) in each of

the four data sections. No more than 1.5% of the tape is used. Ten data

patterns are used in this test. This test takes approximately 22 minutes.

Media Read/Write Since media damage usually comes from the edges of tape to the center of

tape, the media test performs a read/write test by writing two wraps on each

of the two outside data bands, closest to the edge of tape, on both edges of

the tape, for the entire length of tape. This test takes approximately 20

minutes.

Head Read/Write In this test the drive performs a resistance check on the recording head, then

it does a read/ write test where it writes two wraps in each of the two center

data bands of tape to verify the head is performing well. This test takes

approximately 20 minutes.

Wrap This test is used to ensure that the drive is communicating correctly with the

host and the library.

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Quantum Scalar 24 Spécifications Page 131

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