Configuring DIV in SAM-QFS

DIV can be enabled or disabled by changing the div values in the /etc/opt/SUNWsamfs/defaults.conf file. DIV is disabled by default. The following values can be set to enable or disable DIV in SAM-QFS:

• div = off

  Disables DIV. This is the default value.

• div = on

  Enables DIV for read, write, and verify operations.

• div = verify

  Enables DIV for read, write, and verify operations. Also, enables the archiver's verify after write mode.

  For more information, see defaults.conf(4) in Sun QFS and Sun Storage Archive Manager Reference Manual.

How to Configure DIV in SAM-QFS

1. Use the samd stop command to stop all operations.

   # samd stop

2. Set the div value in the /etc/opt/SUNWsamfs/defaults.conf file to either on or verify.

   div = on | verify

3. Propagate the configuration changes.

   # samd config

4. Start all operations.

   # samd start

Examples of Using DIV

The following examples show how to use the samu command to display the DIV settings in the defaults.conf file and to display various verify-after-write statuses.

For more information about displaying DIV settings, see samu(1M) in Sun QFS and Sun Storage Archive Manager Reference Manual.

Example 13-1 Display the DIV Setting

Use the following syntax to display the DIV settings in the defaults.conf file:

# samu -L
div VERIFY

Example 13-2 Display Verify After Write Archiver Status

When DIV verify is enabled, the archiver can display the verifying status when the archive file is being verified. Use the following syntax to display the verify-after-write archive status:

# samu -a
sam-arcopy:  qfs.arset1.2.344 ti.TKC960
Verifying archive file at position 1175

Example 13-3 Display Verify After Write Device Status

The samu -s command displays information about the tape drives that are performing the archive file verify operation. Use the following syntax to display the verify-after-write device status:

# samu -s
ti        91 on         /dev/rmt/4cbn         90 -l----oVr
Verify averaging 240.9 MB/s

You can use the itemize -2 command to display the last verified time and position. For example:

# itemize -2 30
Robot VSN catalog: eq: 30 count: 2
slot access_time count use ty vsn lvtime lvpos
0 Jun 24 17:21 2 0% ti CET052 Jun 24 17:21 0
1 Jun 24 18:43 8 5% ti CET050 Jun 24 17:11 0x5ee