Dell PowerEdge Manuel rapide - Page 5

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Storage

Uniﬁed mode

Dell PowerEdge server

PERC 6/E

Figure 4.

Unified and split modes for Dell PowerVault MD1000 enclosures with Dell PERC 6/E controllers

The background initialization rate is

controlled by the BGI rate set using

Dell OpenManage

Server Administrator

™

(OMSA) Storage Management.

other key data protection features

Other key data protection features of

PERC 6 controllers include the following:

SMART:

The SMART feature monitors

■ ■

the internal performance of motors,

heads, and physical disk electronics to

help detect predictable physical disk

failures.

Failed physical disk detection:

■ ■

controllers can automatically detect

and rebuild failed physical disks when

a new drive is placed in the slot where

the failed drive resided or when an

applicable hot spare is present.

Automatic rebuilds can be performed

transparently with hot spares.

Hot spares:

The controllers support

■ ■

global hot spare, dedicated hot spare,

and affinity configurations, which

administrators can set up using the Dell

BIOS Configuration Utility as well as

OMSA Storage Management. Global hot

spares can typically be used in any

degraded RAID array when the hot

spare has sufficient capacity to fit into

the RAID container. Dedicated hot

spares are reserved for a particular disk

group. The affinity option prioritizes a

hot spare to the enclosure that it is

located in.

DELL POWER SOLUTIONS | May 2008

Split mode

Dell PowerEdge server

PERC 6/E

Daisy-chained

Dell PowerVault

MD1000 enclosure

MD1000 enclosures

Transportable battery backup unit

■ ■

(TBBU): The TBBU is a cache memory

module with an integrated battery

pack that enables administrators to

transport the cache module with the

battery into a different controller. The

TBBU helps protect the integrity of

cached data by providing backup

power during a power outage. After

power is restored to the controller, the

cache is flushed and the protected

data is written to the disk drives.

Physical

■ ■

Administrators can manually substitute

The

a replacement unit in a disk subsystem

for a defective one while the subsystem

is performing its normal functions.

Heartbeat status LED and dirty cache

■ ■

LED: The heartbeat status LED on the

controllers indicates activity on the

chip, while the dirty cache LED indi-

cates that the cache has data that has

not yet been written to disk.

Integrating PERC 6 controllers into

environments using Dell PowerEdge

servers, Dell PowerVault storage, and

Dell Precision workstations can help

administrators create a robust and

highly available environment designed

to maximize server uptime."

optImIzed deploymentS wIth

dell powerVault Storage

Dell PowerVault storage is engineered to

Dell PowerEdge server

work optimally with Dell PowerEdge serv-

ers and PERC controllers. Combining the

PERC 6/E with the Dell PowerVault

PERC 6/E

MD1000 disk expansion enclosure can

provide a high-performance, enterprise-

class direct attach storage solution.

Administrators can use OMSA Storage

Management software to manage both

the external array and internal storage

within the server itself, helping streamline

and simplify storage management through

a single interface while helping reduce

resource load on the system.

PowerVault MD1000 along with the PERC

6/E to meet different enterprise needs

and help increase storage provisioning

flexibility by using one of two backplane

modes (see Figure 4):

■ ■

disk

hot

swapping:

■ ■

Administrators can customize the

Unified mode:

Unified mode allows

administrators to access all 15 hard

drives from a single controller, and

supports daisy-chaining up to two

additional enclosures per channel—

supporting a total of up to 90 hard

drives when using six enclosures and

two channels in each controller.

Split mode:

Split mode allows two

controllers to share the same enclo-

sure, with one having access to eight

hard drives and one having access to

the other seven hard drives. This con-

figuration does not support daisy-

chaining additional enclosures.