Configuring a Boot Device on an EMC Storage Array
Limitations
This section discusses limitations, including:
◆“Common limitations” on page 145
◆
◆
Common limitations
Boot configurations must not deviate from the following limitations established by EMC:
◆The EMC Storage device must have enough disk space to hold the Linux operating system.
◆A maximum of 32 volumes may be configured on the EMC storage array port that will be used to boot Linux.
◆For RHEL4 U4, 4 Gb adapter driver will not load automatically at boot time. The adapter will not detect boot LUN and give no device found error.
To force load 4 Gb driver, at the point where it says no device found, click on ADD DEVICE, then select QLA2400.
◆EMC recommends, although it is not required, that the Symmetrix, VNX series, or CLARiiON device that is to contain the Master Boot Record (MBR) for the host have a lower logical unit number (LUN) than any other device visible to the host.
Note that this includes the following cases:
•Volume Logix database device when using Volume Logix in a Symmetrix environment — The installer will fail to write the MBR to this device, as it is
–To force the installer to avoid an attempt to write to this device, EMC recommends masking the LUN. The administrative host must first initialize the Volume Logix database. The LUN may then be masked by modifying the active configuration file to enable the 'fba flag2' to restrict access to the Volume Logix database.
Limitations
155
