Dell PowerEdge RAID Controller S110 Manual do Utilizador descarregar pdf (Página 18)

16 Features

CAUTION: The BIOS Configuration Utility (<CTRL><R>) pauses, and prompts for

action, for the degraded virtual disk(s), if a "pause if degraded" option is enabled

in the BIOS Configuration Utility (<CTRL><R>).

CAUTION: After the migration occurs, make sure that all of the physical disks

have been migrated and are present in the appropriate virtual disks.

Virtual Disk RAID Levels

Virtual disks can be created at different RAID levels.

Virtual Disk Transformation

Virtual disk transformation can consist of:

• Capacity expansion, using OCE/Reconfigure (to allocate additional virtual

disk space on the original physical disks or after additional physical disks

are added).

• Rebuilding (rebuilding data on a virtual disk consists of using an available

hot spare or backup physical disk).

Read, Write, and Cache Policy

Table 2- 1 in di cat es the

read

, write, and cache policies that are supported by

the PERC S110 adapter.

CAUTION: The current default for Write-Cache mode enablement is

Write Through, No Read Ahead (WT, NRA). To enable Write Back (WB), a UPS is

recommended.

Table 2-1. Read, Write, and Cache Policy for the PERC S110

Category Supported by PERC S110 adapter

Cache Settings Yes

Read Ahead/Write Back Yes

No Read Ahead/Write Back Yes

Read Ahead/Write Through Yes

No Read Ahead/Write Through Yes

A5_bk0.book Page 16 Thursday, May 29, 2014 11:37 AM

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 75 76

Sem comentários

Dell PowerEdge RAID Controller S110 Manual do Utilizador Página 18