Dell EMC AX4-5 Instalační příručka stáhnout pdf (Strana 41)

Technical notes

EMC AX4-5 Series Integrated Management Software Release Notes

Disk module insertion and removal

When inserting or removing more than one disk module from a storage

system, you must pause between each removal and insertion to allow the

storage system to recover. Before inserting or removing the next disk

module you should make sure that:

 A newly inserted disk module's amber light is off and its blue light

has returned to a normal state: on or blinking due to I/O in progress.

 On a disk module removal, the blue lights for the other disk modules

return to a normal state: on or blinking due to I/O in progress.

 The storage system appears to have resumed normal operation.

Database disk module replacement

You should replace disk module 0, 1 or 2 only when the storage system

is fully operational. The disk modules in these slots are FLARE OE

database disk modules. Each database disk module contains an image of

the storage-system configuration and current operating status. FLARE

OE software ensures that the newly inserted disk module has the correct

database information copied to it when it is installed while the storage

system is running. If you insert a disk module into one of these slots

when the storage system is powered off, the correct FLARE OE database

information is not written to the replaced database disk module. As a

result, storage-system configuration problems may occur when the

storage system is powered up or if another database disk module fails. If

you install a FLARE OE database disk module and you find that existing

virtual disks are not enabled, contact your service provider.

Software image disk module replacement

The FLARE software image is stored on disk modules 0 and 2 for the

AX4-5SC, AX4-5SCi and AX4-5SCF4 and disk modules 0, 1, 2 and 3 for

the AX4-5, AX4-5i and AX4-5F8. Disk modules 0 and 2 mirror the

software for the AX4-5SC, AX4-5SCi and AX4-5SCF4 SP, and also for SP

A on the AX4-5, AX4-5i and AX4-5F8. Disk modules 1 and 3 mirror the

software for SP B on the AX4-5, AX4-5i and AX4-5F8. You should never

remove and/or replace both disk modules in one of the mirrors at the

same time. If you do, no software exists to support that SP, and the SP

becomes nonfunctional.

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Dell EMC AX4-5 Instalační příručka Strana 41