Shulou(Shulou.com)06/01 Report--

This article introduces how to configure the wwid of the acquisition device for iscsi+multipath multipath storage on RedHat 5.4. the content is very detailed, which can be used for reference by interested friends. I hope it will be helpful to you.

Recently, Oracle 11g R2 RAC has been built on RedHat, in which storage management is based on iscsi+multipath, so take out this part of the management configuration separately.

One: install the iscsi package

Install the scsi initiator package. The installation package can be found on the installation CD

[root@rac122 ~] # rpm-qa | grep iscsi

Iscsi-initiator-utils-6.2.0.871-0.10.el5

Two: enable iscsi devices

Create a new API file, which is saved in the / var/lib/iscsi/ifaces directory:

[root@rac122 ~] # ls / var/lib/iscsi/ifaces

Bnx2i.00:00:00:00:00:00

[root@rac122] # iscsiadm-m iface-I eth0-o new

New interface eth0 added

[root@rac122 ~] # ls / var/lib/iscsi/ifaces

Bnx2i.00:00:00:00:00:00 eth0

[root@rac122 ~] # cat / var/lib/iscsi/ifaces/eth0

# BEGIN RECORD 2.0,871

Iface.iscsi_ifacename = eth0

Iface.transport_name = tcp

# END RECORD

[root@rac122] # iscsiadm-m iface-I eth0-- op=update-n iface.net_ifacename-v eth0

Eth0 updated.

[root@rac122 ~] # cat / var/lib/iscsi/ifaces/eth0

# BEGIN RECORD 2.0,871

Iface.iscsi_ifacename = eth0

Iface.net_ifacename = eth0

Iface.transport_name = tcp

# END RECORD

Restart the iscsi service after building the interface file

[root@rac122 ~] # service iscsi restart

Stopping iSCSI daemon:

Iscsid dead but pid file exists

[OK] off network shutdown. Starting iSCSI daemon: [OK]

[OK]

Setting up iSCSI targets: iscsiadm: No records found!

[OK]

Collect the iscsi target according to the IP provided

[root@rac122] # iscsiadm-m discovery-t st-p 10.1.252.148VR 3260

10.1.252.148purl 3260 iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7

10.1.252.148purl 3260 iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8

10.1.252.148Flux 3260 iqn.2001 1-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6

10.1.252.148purl 3260 iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5

10.1.252.148Portuguese 3260 iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2

10.1.252.148purl 3260 iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1

10.1.252.148Portuguese 3260 iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3

10.1.252.148purl 3260 iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac4

Establish a connection with the target searched for

[root@rac122] # iscsiadm-m node-l

Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7, portal: 10.1.252.148Magne3260]

Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8, portal: 10.1.252.148Magne3260]

Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6, portal: 10.1.252.148Magne3260]

Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5, portal: 10.1.252.148Magne3260]

Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2, portal: 10.1.252.148j3260]

Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1, portal: 10.1.252.148Magne3260]

Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3, portal: 10.1.252.148j3260]

Logging in to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac4, portal: 10.1.252.148Magne3260]

Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7, portal: 10.1.252.148Magne3260]: successful

Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8, portal: 10.1.252.148Magne3260]: successful

Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6, portal: 10.1.252.148 Magi 3260]: successful

Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5, portal: 10.1.252.148Magne3260]: successful

Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2, portal: 10.1.252.148j3260]: successful

Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1, portal: 10.1.252.148Magne3260]: successful

Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3, portal: 10.1.252.148j3260]: successful

Login to [iface: eth0, target: iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac4, portal: 10.1.252.148Magne3260]: successful

[root@rac122] # iscsiadm-m session

Tcp: [1] 10.1.252.148Franco 3260 iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7

Tcp: [2] 10.1.252.148Franco 3260 iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8

Tcp: [3] 10.1.252.148 Virgo 3260 iqn.2001-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6

Tcp: [4] 10.1.252.148Franco 3260 iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5

Tcp: [5] 10.1.252.148Franco 3260 iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2

Tcp: [6] 10.1.252.148Franco 3260 iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1

Tcp: [7] 10.1.252.148VR 3260 iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3

Tcp: [8] 10.1.252.148Franco 3260 iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac4

[root@rac122] # iscsiadm-m session-P3

ISCSI Transport Class version 2.0-871

Version 2.0-871

Target: iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7

Current Portal: 10.1.252.149:3260,1

Persistent Portal: 10.1.252.148:3260,1

**********

Interface:

**********

Iface Name: eth0

Iface Transport: tcp

Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1

Iface IPaddress: 10.1.252.122

Iface HWaddress:

Iface Netdev: eth0

SID: 1

ISCSI Connection State: LOGGED IN

ISCSI Session State: LOGGED_IN

Internal iscsid Session State: NO CHANGE

************************

Negotiated iSCSI params:

************************

HeaderDigest: None

DataDigest: None

MaxRecvDataSegmentLength: 262144

MaxXmitDataSegmentLength: 65536

FirstBurstLength: 65536

MaxBurstLength: 262144

ImmediateData: Yes

InitialR2T: No

MaxOutstandingR2T: 1

************************

Attached SCSI devices:

************************

Host Number: 20 State: running

Scsi20 Channel 00 Id 0 Lun: 0

Attached scsi disk sdk State: running

Target: iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8

Current Portal: 10.1.252.150:3260,1

Persistent Portal: 10.1.252.148:3260,1

**********

Interface:

**********

Iface Name: eth0

Iface Transport: tcp

Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1

Iface IPaddress: 10.1.252.122

Iface HWaddress:

Iface Netdev: eth0

SID: 2

ISCSI Connection State: LOGGED IN

ISCSI Session State: LOGGED_IN

Internal iscsid Session State: NO CHANGE

************************

Negotiated iSCSI params:

************************

HeaderDigest: None

DataDigest: None

MaxRecvDataSegmentLength: 262144

MaxXmitDataSegmentLength: 65536

FirstBurstLength: 65536

MaxBurstLength: 262144

ImmediateData: Yes

InitialR2T: No

MaxOutstandingR2T: 1

************************

Attached SCSI devices:

************************

Host Number: 21 State: running

Scsi21 Channel 00 Id 0 Lun: 0

Attached scsi disk sdd State: running

Target: iqn.2001-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6

Current Portal: 10.1.252.149:3260,1

Persistent Portal: 10.1.252.148:3260,1

**********

Interface:

**********

Iface Name: eth0

Iface Transport: tcp

Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1

Iface IPaddress: 10.1.252.122

Iface HWaddress:

Iface Netdev: eth0

SID: 3

ISCSI Connection State: LOGGED IN

ISCSI Session State: LOGGED_IN

Internal iscsid Session State: NO CHANGE

************************

Negotiated iSCSI params:

************************

HeaderDigest: None

DataDigest: None

MaxRecvDataSegmentLength: 262144

MaxXmitDataSegmentLength: 65536

FirstBurstLength: 65536

MaxBurstLength: 262144

ImmediateData: Yes

InitialR2T: No

MaxOutstandingR2T: 1

************************

Attached SCSI devices:

************************

Host Number: 22 State: running

Scsi22 Channel 00 Id 0 Lun: 0

Attached scsi disk sde State: running

Target: iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5

Current Portal: 10.1.252.150:3260,1

Persistent Portal: 10.1.252.148:3260,1

**********

Interface:

**********

Iface Name: eth0

Iface Transport: tcp

Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1

Iface IPaddress: 10.1.252.122

Iface HWaddress:

Iface Netdev: eth0

SID: 4

ISCSI Connection State: LOGGED IN

ISCSI Session State: LOGGED_IN

Internal iscsid Session State: NO CHANGE

************************

Negotiated iSCSI params:

************************

HeaderDigest: None

DataDigest: None

MaxRecvDataSegmentLength: 262144

MaxXmitDataSegmentLength: 65536

FirstBurstLength: 65536

MaxBurstLength: 262144

ImmediateData: Yes

InitialR2T: No

MaxOutstandingR2T: 1

************************

Attached SCSI devices:

************************

Host Number: 23 State: running

Scsi23 Channel 00 Id 0 Lun: 0

Attached scsi disk sdf State: running

Target: iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2

Current Portal: 10.1.252.149:3260,1

Persistent Portal: 10.1.252.148:3260,1

**********

Interface:

**********

Iface Name: eth0

Iface Transport: tcp

Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1

Iface IPaddress: 10.1.252.122

Iface HWaddress:

Iface Netdev: eth0

SID: 5

ISCSI Connection State: LOGGED IN

ISCSI Session State: LOGGED_IN

Internal iscsid Session State: NO CHANGE

************************

Negotiated iSCSI params:

************************

HeaderDigest: None

DataDigest: None

MaxRecvDataSegmentLength: 262144

MaxXmitDataSegmentLength: 65536

FirstBurstLength: 65536

MaxBurstLength: 262144

ImmediateData: Yes

InitialR2T: No

MaxOutstandingR2T: 1

************************

Attached SCSI devices:

************************

Host Number: 24 State: running

Scsi24 Channel 00 Id 0 Lun: 0

Attached scsi disk sdh State: running

Target: iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1

Current Portal: 10.1.252.149:3260,1

Persistent Portal: 10.1.252.148:3260,1

**********

Interface:

**********

Iface Name: eth0

Iface Transport: tcp

Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1

Iface IPaddress: 10.1.252.122

Iface HWaddress:

Iface Netdev: eth0

SID: 6

ISCSI Connection State: LOGGED IN

ISCSI Session State: LOGGED_IN

Internal iscsid Session State: NO CHANGE

************************

Negotiated iSCSI params:

************************

HeaderDigest: None

DataDigest: None

MaxRecvDataSegmentLength: 262144

MaxXmitDataSegmentLength: 65536

FirstBurstLength: 65536

MaxBurstLength: 262144

ImmediateData: Yes

InitialR2T: No

MaxOutstandingR2T: 1

************************

Attached SCSI devices:

************************

Host Number: 25 State: running

Scsi25 Channel 00 Id 0 Lun: 0

Attached scsi disk sdg State: running

Target: iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3

Current Portal: 10.1.252.150:3260,1

Persistent Portal: 10.1.252.148:3260,1

**********

Interface:

**********

Iface Name: eth0

Iface Transport: tcp

Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1

Iface IPaddress: 10.1.252.122

Iface HWaddress:

Iface Netdev: eth0

SID: 7

ISCSI Connection State: LOGGED IN

ISCSI Session State: LOGGED_IN

Internal iscsid Session State: NO CHANGE

************************

Negotiated iSCSI params:

************************

HeaderDigest: None

DataDigest: None

MaxRecvDataSegmentLength: 262144

MaxXmitDataSegmentLength: 65536

FirstBurstLength: 65536

MaxBurstLength: 262144

ImmediateData: Yes

InitialR2T: No

MaxOutstandingR2T: 1

************************

Attached SCSI devices:

************************

Host Number: 26 State: running

Scsi26 Channel 00 Id 0 Lun: 0

Attached scsi disk sdi State: running

Target: iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac4

Current Portal: 10.1.252.150:3260,1

Persistent Portal: 10.1.252.148:3260,1

**********

Interface:

**********

Iface Name: eth0

Iface Transport: tcp

Iface Initiatorname: iqn.1994-05.com.redhat:b9e5bb909ae1

Iface IPaddress: 10.1.252.122

Iface HWaddress:

Iface Netdev: eth0

SID: 8

ISCSI Connection State: LOGGED IN

ISCSI Session State: LOGGED_IN

Internal iscsid Session State: NO CHANGE

************************

Negotiated iSCSI params:

************************

HeaderDigest: None

DataDigest: None

MaxRecvDataSegmentLength: 262144

MaxXmitDataSegmentLength: 65536

FirstBurstLength: 65536

MaxBurstLength: 262144

ImmediateData: Yes

InitialR2T: No

MaxOutstandingR2T: 1

************************

Attached SCSI devices:

************************

Host Number: 27 State: running

Scsi27 Channel 00 Id 0 Lun: 0

Attached scsi disk sdj State: running

View connection status

[root@rac122 ~] # netstat-anp | grep 3260

Tcp 0 0 10.1.252.122:48858 10.1.252.150:3260 ESTABLISHED 19427/iscsid

Tcp 0 0 10.1.252.122:48856 10.1.252.150:3260 ESTABLISHED 19427/iscsid

Tcp 0 0 10.1.252.122:48862 10.1.252.150:3260 ESTABLISHED 19427/iscsid

Tcp 0 0 10.1.252.122:48861 10.1.252.150:3260 ESTABLISHED 19427/iscsid

Tcp 0 0 10.1.252.122:63216 10.1.252.149:3260 ESTABLISHED 19427/iscsid

Tcp 0 0 10.1.252.122:63218 10.1.252.149:3260 ESTABLISHED 19427/iscsid

Tcp 0 0 10.1.252.122:63221 10.1.252.149:3260 ESTABLISHED 19427/iscsid

Tcp 0 0 10.1.252.122:63220 10.1.252.149:3260 ESTABLISHED 19427/iscsid

[root@rac122] # iscsiadm-m node

10.1.252.148purl 3260 iqn.2001-05.com.equallogic:0-8a0906-dcced9007-10d000000c74cc10-vol-rac7

10.1.252.148purl 3260 iqn.2001-05.com.equallogic:0-8a0906-495ed9007-b68000000ca4cc4d-vol-rac8

10.1.252.148Flux 3260 iqn.2001 1-05.com.equallogic:0-8a0906-fdded9007-b80000000c44cb23-vol-rac6

10.1.252.148purl 3260 iqn.2001-05.com.equallogic:0-8a0906-fc7ed9007-6b1000000c14cb23-vol-rac5

10.1.252.148Portuguese 3260 iqn.2001-05.com.equallogic:0-8a0906-668ed9007-1ca000000a34ca57-vol-rac2

10.1.252.148purl 3260 iqn.2001-05.com.equallogic:0-8a0906-631ed9007-a93000000a04ca57-vol-rac1

10.1.252.148Portuguese 3260 iqn.2001-05.com.equallogic:0-8a0906-697ed9007-251000000a64ca57-vol-rac3

10.1.252.148purl 3260 iqn.2001-05.com.equallogic:0-8a0906-6b1ed9007-b7c000000a94ca57-vol-rac

Three: install the Mutipath package

Install the scsi initiator package. The installation package can be found on the installation CD

[root@rac122 ~] # rpm-qa | grep device-mapper

Device-mapper-multipath-0.4.7-30.el5

Device-mapper-1.02.32-1.el5

Device-mapper-1.02.32-1.el5

Device-mapper-event-1.02.32-1.el5

Four: configure Multipath parameters

4.1. Locate the configuration file and back it up and then modify it

The parameter configuration file for Multipath is: / etc/multipath.conf, most of the contents of this file are annotated after installing the Multipath package. Make a copy of the document and keep it for backup

And then modify another document.

[root@rac122 ~] # cp / etc/multipath.conf / etc/multipath.conf.back

[root@rac122 ~] # ls / etc/ | grep multipath

Multipath.conf

Multipath.conf.bak

4.2. Blacklist filtering

By default, Multipath adds all settings to the Blacklist list, that is, forbids the use of all devices, so cancel the default settings and update the contents of the corresponding blacklist block of the file as follows:

# Blacklist all devices by default. Remove this to enable multipathing

# on the default devices.

Blacklist {

Devnode "^ sd [a] $"

}

4.3.Obtain wwwid

Modify the multipath {in the configuration file

Wwid 36090a07800d98e6657ca340a0000a01c

Alias vol-aidev01

Path_grouping_policy multibus

Path_checker readsector0

Path_selector "round-robin 0"

Failback manual

Rr_weight priorities

No_path_retry 5

} block, wwwid will be used, so you need to first set the wwwid of each device

Check which iscsi devices have just been enabled

[root@rac122 userfile] # fdisk-l

Disk / dev/sda: 299.4 GB, 299439751168 bytes

255 heads, 63 sectors/track, 36404 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/ dev/sda1 * 1 13 104391 83 Linux

/ dev/sda2 14 36404 292310707 + 8e Linux LVM

Disk / dev/sdd: 536.8 GB, 536881397760 bytes

255 heads, 63 sectors/track, 65272 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

Disk / dev/sde: 17.1 GB, 17191403520 bytes

64 heads, 32 sectors/track, 16395 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes

Device Boot Start End Blocks Id System

Disk / dev/sdf: 17.1 GB, 17191403520 bytes

64 heads, 32 sectors/track, 16395 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes

Device Boot Start End Blocks Id System

Disk / dev/sdg: 8603 MB, 8603566080 bytes

64 heads, 32 sectors/track, 8205 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes

Device Boot Start End Blocks Id System

Disk / dev/sdh: 8603 MB, 8603566080 bytes

64 heads, 32 sectors/track, 8205 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes

Disk / dev/sdh doesn't contain a valid partition table

Disk / dev/sdi: 8603 MB, 8603566080 bytes

64 heads, 32 sectors/track, 8205 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes

Device Boot Start End Blocks Id System

Disk / dev/sdj: 8603 MB, 8603566080 bytes

64 heads, 32 sectors/track, 8205 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes

Device Boot Start End Blocks Id System

Disk / dev/sdk: 107.3 GB, 107379425280 bytes

255 heads, 63 sectors/track, 13054 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

You can see that eight iscsi devices are enabled: sdd, sde, sdf, sdg, sdh, sdi, sdj, SDK

Get the wwwid of these eight devices respectively

[root@rac122 userfile] # / sbin/scsi_id-g-u-s / block/sdd

36090a07800d95e494dcca40c000080b6

[root@rac122 userfile] # / sbin/scsi_id-g-u-s / block/sde

36090a07800d9defd23cb440c000000b8

[root@rac122 userfile] # / sbin/scsi_id-g-u-s / block/sdf

36090a07800d97efc23cb140c000010

[root@rac122 userfile] # / sbin/scsi_id-g-u-s / block/sdg

36090a07800d91e6357ca040a000030a9

[root@rac122 userfile] # / sbin/scsi_id-g-u-s / block/sdh

36090a07800d98e6657ca340a0000a01c

[root@rac122 userfile] # / sbin/scsi_id-g-u-s / block/sdi

36090a07800d97e6957ca640a00001025

[root@rac122 userfile] # / sbin/scsi_id-g-u-s / block/sdj

36090a07800d91e6b57ca940a0000c0b7

[root@rac122 userfile] # / sbin/scsi_id-g-u-s / block/sdk

36090a07800d9cedc10cc740c0000d010

After obtaining the wwwid of each device, add the following to the configuration file / etc/multipath.conf

Multipaths {

Multipath {

Wwid 36090a07800d98e6657ca340a0000a01c

Alias vol-aidev01

Path_grouping_policy multibus

Path_checker readsector0

Path_selector "round-robin 0"

Failback manual

Rr_weight priorities

No_path_retry 5

}

Multipath {

Wwid 36090a07800d97efc23cb140c0000106b

Alias vol-aidev02

Path_grouping_policy multibus

Path_checker readsector0

Path_selector "round-robin 0"

Failback manual

Rr_weight priorities

No_path_retry 5

}

Multipath {

Wwid 36090a07800d91e6b57ca940a0000c0b7

Alias vol-aidev03

Path_grouping_policy multibus

Path_checker readsector0

Path_selector "round-robin 0"

Failback manual

Rr_weight priorities

No_path_retry 5

}

Multipath {

Wwid 36090a07800d91e6357ca040a000030a9

Alias vol-aidev04

Path_grouping_policy multibus

Path_checker readsector0

Path_selector "round-robin 0"

Failback manual

Rr_weight priorities

No_path_retry 5

}

Multipath {

Wwid 36090a07800d95e494dcca40c000080b6

Alias vol-aidev05

Path_grouping_policy multibus

Path_checker readsector0

Path_selector "round-robin 0"

Failback manual

Rr_weight priorities

No_path_retry 5

}

Multipath {

Wwid 36090a07800d9defd23cb440c000000b8

Alias vol-aidev06

Path_grouping_policy multibus

Path_checker readsector0

Path_selector "round-robin 0"

Failback manual

Rr_weight priorities

No_path_retry 5

}

Multipath {

Wwid 36090a07800d9cedc10cc740c0000d010

Alias vol-aidev07

Path_grouping_policy multibus

Path_checker readsector0

Path_selector "round-robin 0"

Failback manual

Rr_weight priorities

No_path_retry 5

}

Multipath {

Wwid 36090a07800d97e6957ca640a00001025

Alias vol-aidev08

Path_grouping_policy multibus

Path_checker readsector0

Path_selector "round-robin 0"

Failback manual

Rr_weight priorities

No_path_retry 5

}

}

Devices {

Device {

Vendor "COMPAQ"

Product "HSV110 (C) COMPAQ"

Path_grouping_policy multibus

Getuid_callout "/ sbin/scsi_id-g-u-s / block/%n"

Path_checker readsector0

Path_selector "round-robin 0"

Hardware_handler "0"

Failback 15

Rr_weight priorities

No_path_retry queue

}

}

Restart the Multipath service and verify the configuration

Restart the service

[root@rac122 userfile] # service multipathd restart

Stopping multipathd daemon: [OK]

Starting multipathd daemon: [OK]

Show Mapping

[root@rac122 userfile] # ls-lrt / dev/mapper/*

Crw- 1 root root 10, 63 May 28 10:32 / dev/mapper/control

Brw- 1 root root 253, 6 May 28 10:32 / dev/mapper/VG00-LV_SP01

Brw- 1 root root 253, 0 May 28 10:32 / dev/mapper/VG00-LV01

Brw- 1 root root 253, 1 May 28 10:32 / dev/mapper/VG00-LV_DATA01

Brw- 1 root root 253, 2 May 28 10:32 / dev/mapper/VG00-LV_TMP01

Brw- 1 root root 253, 3 May 28 10:32 / dev/mapper/VG00-LV_ORADATA01

Brw- 1 root root 253, 4 May 28 10:32 / dev/mapper/VG00-LV_VAR01

Brw- 1 root root 253, 5 May 28 10:32 / dev/mapper/VG00-LV_SW01

Brw-rw---- 1 root disk 253, 12 Jun 6 22:08 / dev/mapper/vol-aidev08

Brw-rw---- 1 root disk 253, 8 Jun 6 22:08 / dev/mapper/vol-aidev06

Brw-rw---- 1 root disk 253, 7 Jun 6 22:08 / dev/mapper/vol-aidev05

Brw-rw---- 1 root disk 253, 10 Jun 6 22:08 / dev/mapper/vol-aidev04

Brw-rw---- 1 root disk 253, 9 Jun 6 22:08 / dev/mapper/vol-aidev02

Brw-rw---- 1 root disk 253, 11 Jun 6 22:08 / dev/mapper/vol-aidev01

Brw-rw---- 1 root disk 253, 14 Jun 6 22:08 / dev/mapper/vol-aidev07

Brw-rw---- 1 root disk 253, 13 Jun 6 22:08 / dev/mapper/vol-aidev03

The multipath command can see the active path.

[root@rac122 userfile] # multipath-ll

Vol-aidev08 (36090a07800d97e6957ca640a00001025) dm-12 EQLOGIC,100E-00

[size=8.0G] [features=1 queue_if_no_path] [hwhandler=0] [rw]

\ _ round-robin 0 [prio=1] [active]

\ _ 26 ready 0 sdi 812 [active] [ready]

Vol-aidev07 (36090a07800d9cedc10cc740c0000d010) dm-14 EQLOGIC,100E-00

[size=100G] [features=1 queue_if_no_path] [hwhandler=0] [rw]

\ _ round-robin 0 [prio=1] [active]

\ _ 20 ready 0 sdk 8 ready [active]

Vol-aidev06 (36090a07800d9defd23cb440c000000b8) dm-8 EQLOGIC,100E-00

[size=16G] [features=1 queue_if_no_path] [hwhandler=0] [rw]

\ _ round-robin 0 [prio=1] [active]

\ _ 22 ready 0 sde 8:64 [active] [ready]

Vol-aidev05 (36090a07800d95e494dcca40c000080b6) dm-7 EQLOGIC,100E-00

[size=500G] [features=1 queue_if_no_path] [hwhandler=0] [rw]

\ _ round-robin 0 [prio=1] [active]

\ _ 21 ready 0 sdd 8:48 [active] [ready]

Vol-aidev04 (36090a07800d91e6357ca040a000030a9) dm-10 EQLOGIC,100E-00

[size=8.0G] [features=1 queue_if_no_path] [hwhandler=0] [rw]

\ _ round-robin 0 [prio=1] [active]

\ _ 25 sdg 8:96 [active] [ready]

Vol-aidev03 (36090a07800d91e6b57ca940a0000c0b7) dm-13 EQLOGIC,100E-00

[size=8.0G] [features=1 queue_if_no_path] [hwhandler=0] [rw]

\ _ round-robin 0 [prio=1] [active]

\ _ 27 ready 0 sdj 815 [active] [ready]

Vol-aidev02 (36090a07800d97efc23cb140c0000106b) dm-9 EQLOGIC,100E-00

[size=16G] [features=1 queue_if_no_path] [hwhandler=0] [rw]

\ _ round-robin 0 [prio=1] [active]

\ _ 23 sdf 0 sdf 8:80 [active] [ready]

Vol-aidev01 (36090a07800d98e6657ca340a0000a01c) dm-11 EQLOGIC,100E-00

[size=8.0G] [features=1 queue_if_no_path] [hwhandler=0] [rw]

\ _ round-robin 0 [prio=1] [active]

\ _ 24 ready 0 sdh 812 [active] [ready]

Set the multipath service to boot automatically

[root@rac121 ~] # chkconfig multipathd on

So much for the wwid about how to configure iscsi+multipath multipath storage on RedHat 5.4.I hope the above can help you and learn more. If you think the article is good, you can share it for more people to see.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.