Installation guide

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EMC Host Connectivity with QLogic Fibre Channel and iSCSI (HBAs) and (CNAs) for the Linux Environment
Configuring a Boot Device on an EMC Storage Array
Cautions and restrictions for booting from EMC storage array
CAUTION
!
If Linux loses connectivity long enough, the disks disappear from
the system. To prevent further data from being lost in a situation
like this, EMC recommends that the error behavior be changed
from continue to remount read-only. To make this change, consult
the manpage for tune2fs. A hard reboot is required to bring the
system back to a usable state.
CAUTION
!
You should configure the host with enough memory to eliminate
the need for a swap partition. EMC cannot recommend an amount
of memory as this varies greatly depending upon the environment.
EMC recommends shutting down the host server during any
maintenance procedures that could make the boot disk unavailable to
the host. Any of these events could crash a system booting from an
EMC storage array.
CLARiiON-specific cautions and restrictions
◆ Lost connection to CLARiiON storage array (pulled or damaged
cable connection).
◆ CLARiiON service and upgrade procedures, such as on-line
CLARiiON FLARE upgrades and/or configuration changes.
◆ CLARiiON SP failures, including failed lasers.
◆ CLARiiON storage array power failure.
◆ Storage Area Network failures, such as failures in Fibre Channel
switches, switch components, or switch power.
◆ Storage area network service and upgrade procedures, such as
firmware upgrades or hardware replacements.
◆ Trespass of a CLARiiON LUN from one SP to the other.