Installation guide

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
#
22.4. Configuring IPL from a SCSI Device
Anaconda (the installation program) supports the direct installation to SCSI devices. This section
includes information on how to IPL from a SCSI device within z/VM.
22.4 .1. IPL t he SCSI Disk
To IPL the SCSI disk, we provide the WWPN and LUN to the machine loader using the SET LOADDEV
command.
#cp 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
Ready; T=0.01/0.01 15:47:56
IPL the SCSI disk using the FCP device defined to the guest.
q fcp
00: FCP 010A ON FCP 010ACHPID C1 SUBCHANNEL = 0000
⁠Chapt er 2 2 . Addit ional Informat ion for IBM Syst em z Users
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