Red Hat ENTERPRISE LINUX AS 2.1 - Guia de Instalação descarregar pdf (Página 65)

Appendix F. Additional Information for S/390 and zSeries Users 57

The conﬁguration of /dev/md0 can be examined more closely using the command mdadm --detail

/dev/md0 to verify that it is, in fact, a multipath device:

/dev/md0:

Version : 00.90.00

Creation Time : Tue Mar 2 10:56:37 2004

Raid Level : multipath

Array Size : 3905408 (3.72 GiB 3.100 GB)

Raid Devices : 1

Total Devices : 4

Preferred Minor : 0

Persistence : Superblock is persistent

Update Time : Tue Mar 2 10:56:37 2004

State : dirty, no-errors

Active Devices : 1

Working Devices : 4

Failed Devices : 0

Spare Devices : 3

Number Major Minor RaidDevice State

0 8 49 0 active sync /dev/sdd1

1 8 17 1 spare /dev/sdb1

2 8 33 2 spare /dev/sdc1

3 8 1 3 spare /dev/sda1

UUID : 4b564608:fa01c716:550bd8ff:735d92dc

Events : 0.1

Another feature of mdadm is the ability to force a device (be it a member of a RAID array or a

path in a multipath conﬁguration) to be removed from an operating conﬁguration. In the following

example, /dev/sda1 is ﬂagged as being faulty, is then removed, and ﬁnally is added back into the

conﬁguration. For a multipath conﬁguration, these actions would not affect any I/O activity taking

place at the time:

# mdadm /dev/md0 -f /dev/sda1

mdadm: set /dev/sda1 faulty in /dev/md0

# mdadm /dev/md0 -r /dev/sda1

mdadm: hot removed /dev/sda1

# mdadm /dev/md0 -a /dev/sda1

mdadm: hot added /dev/sda1

F.4. Conﬁguring IPL from a SCSI Device

Anaconda (the installation program) supports the direct installation of Red Hat Enterprise Linux to

SCSI devices. This section includes information on how to IPL from a SCSI device within z/VM.

F.4.1. IPL the SCSI Disk

To IPL the SCSI disk, we provide the WWPN and LUN to the machine loader using the SET LOADDEV

command.

set loaddev portname 50050763 00c18154 lun 57190000 00000000

Ready; T=0.01/0.01 15:47:53

q loaddev

PORTNAME 50050763 00C18154 LUN 57190000 00000000 BOOTPROG 0

BR_LBA 00000000 00000000

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 85 86

Comentários a estes Manuais

Sem comentários

Red Hat ENTERPRISE LINUX AS 2.1 - Guia de Instalação Página 65

Comentários a estes Manuais

Manuais e produtos relacionados com Software Red Hat ENTERPRISE LINUX AS 2.1 -