Settings for md devices, Notes on setting up md devices, Settings for md devices -159 – HP Hitachi Dynamic Link Manager Software Licenses User Manual

Page 231: Notes on setting up md devices -159, For details about the md device settings, see, Settings for md devices on

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If you have an HDLM device name as the output, change the UUID to

the HDLM device name in the /etc/crypttab file's second field.

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If you have got a SCSI device name as the output, check the output

of step 1 to confirm the HDLM device name corresponding to the SCSI

device name, and change the UUID to the HDLM device name in

the /etc/crypttab file's second field.

The following shows an example of changing the setting in the /etc/
crypttab file's second field.

Before:

luks-volume1 UUID="050f9901-3ab8-4556-a091-9c6e4a404f09" /etc/

cryptpassword1

After:

luks-volume1 /dev/sddlmaa /etc/cryptpassword1

4

.

Unmap the SCSI device from the device used by the device mapper.
The following shows an example of unmapping the SCSI device from

the /dev/mapper/luks-volume1 device.

# cryptsetup luksClose luks-volume1

#

5

.

Map the device used by device mapper to the HDLM device.
The following shows an example of mapping /dev/mapper/luks-volume1

(that was unmapped at step 4) to the HDLM device when using a key file

(/etc/cryptpassword1).

# cryptsetup -d /etc/cryptpassword1 luksOpen /dev/sddlmaa luks-

volume1

key slot 0 unlocked.

Command successful.

#

6

.

Change the single-path configuration to a multi-path configuration.

Settings for md Devices

This section explains the procedures that the user must perform when using

md devices.

Notes on Setting Up md Devices

The following are notes on using md devices:

Because HDLM is multi-path software, it cannot be used with the
MULTIPATH function for md devices.

If you are using the MULTIPATH function for md devices before you install

HDLM, change it to the LINEAR function after installing HDLM.

Creating an HDLM Environment

3-159

Hitachi Dynamic Link Manager (for Linux®) User Guide

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