Adaptec GDT RN Series Bedienungsanleitung PDF herunterladen (Seite 69)

C.8 Methods for the Replacement of a Disk Drive

The ICP Controller and the ICP Firmware offer a variety of possibilities to replace a defective

disk drive. If and when to use them depends on the physical environment of your server.

With some servers the disk drives are just mounted into the server enclosure, they are not

removable. With other servers there is a backplane which is intelligent (e.g., with SAF-TE)

and which hosts a number of disk drives with the SCA connector (Single Connector At-

tachment). Another type of server has the disk drive in hot pluggable disk carriers which

have become pretty popular during the last 2 years. These carriers are often "stupid" and do

not communicate with the ICP Controller or server. Though, they can display the disk

drive`s temperature or the status of their build in fan.

Manual Hot Plug

Manual Hot PlugManual Hot Plug

Manual Hot Plug Auto Hot Plug

Auto Hot PlugAuto Hot Plug

Auto Hot Plug Automatic Replacement

Automatic ReplacementAutomatic Replacement

Automatic Replacement

with Hot Fix Drive

with Hot Fix Drivewith Hot Fix Drive

with Hot Fix Drive

Typical Server

Typical ServerTypical Server

Typical Server

Env

EnvEnv

Envi

ironment

ronmentronment

ronment

Low Cost.

Disk Drives are physically

mounted in the server enclo-

sure and are not removable.

Additional cost for external

enclosure, cables, backplanes,

etc..

Disk Drives are installed re-

movable in an intelligent or

non-intelligent subsystem. The

subsystem complies with one

of the following enclosure

standards:



"SAF-TE" (SCSI Accessed

Fault Tolerant Enclosures)



"SES" (SCSI Enclosure

Services)



"Intelligent Fault Bus"

(former DEC™ fault bus)



Non-Intelligent Subsys-

tems using hot pluggable

disk carriers

High availability.

Right from the begin-

ning, the ICP Controller

has a spare drive. In the

case that one drive of

an Array Drive has

failed, the spare drive

(we at ICP call it Hot Fix

Drive), is automatically

build into the Array

Drive. Without any user

interaction the Array

Drive is becoming, re-

dundant, again.

Description

DescriptionDescription

Description

ICP RAID Console or ICP

RAID Navigator guides the

user to the point where the

new disk drives can be build

into the Array Drive.

The subsystem has to be con-

figured with ICP RAID Console

or ICP RAID Navigator, before

the Auto Hot Plug can work.

Thereafter a disk drive can just

be pulled out and plugged in

again, and the ICP Controller

"knows" what to do. In addi-

tion, SAF-TE and SES report

the enclosure status (power

supplies, fans, temperature

etc.) to the ICP Controller and

the ICP driver.

The Hot Fixe Drive is

assigned to an Array

Drive. There are two

types of Hot Fix Drives:



Private Hot Fix

Drive

(Available for one

Array Drive, only)



Pool Hot Fix Drive

(Several Array

Drives share this

Hot Fix Drive)

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