在测试oracle rac的时候用iscsi来模拟磁阵的(真的磁阵需要多路径软件)，简单的记录下
#scsi server yum install scsi-target-utils service tgtd start chkconfig tgtd on mkdir /srv/iscsi dd if=/dev/zero of=/srv/iscsi/disk01.img bs=1M count=200
#配置虚拟磁盘 vi /etc/tgt/targets.conf #backing-store (虚拟的装置) #direct-store (实际的装置) <target iqn.2014-11.dev.iscsi-target:iscsidisk> backing-store /srv/iscsi/disk01.img initiator-address 192.168.55.0/24 incominguser iscsiadm iscsiadm123 write-cache off </target>
[root@localhost ~]# tgt-admin -show Target 1: iqn.2014-11.dev.iscsi-target:iscsidisk System information: Driver: iscsi State: ready I_T nexus information: LUN information: LUN: 0 Type: controller SCSI ID: IET 00010000 SCSI SN: beaf10 Size: 0 MB, Block size: 1 Online: Yes Removable media: No Prevent removal: No Readonly: No Backing store type: null Backing store path: None Backing store flags: LUN: 1 Type: disk SCSI ID: IET 00010001 SCSI SN: beaf11 Size: 210 MB, Block size: 512 Online: Yes Removable media: No Prevent removal: No Readonly: No Backing store type: rdwr Backing store path: /srv/iscsi/disk1.img Backing store flags: Account information: ACL information: 192.168.55.0/24 [root@localhost ~]# tgt-admin --show Target 1: iqn.2014-11.dev.iscsi-target:iscsidisk System information: Driver: iscsi State: ready I_T nexus information: I_T nexus: 5 Initiator: iqn.1994-05.com.redhat:1e12cf823426 Connection: 0 IP Address: 192.168.55.159 LUN information: LUN: 0 Type: controller SCSI ID: IET 00010000 SCSI SN: beaf10 Size: 0 MB, Block size: 1 Online: Yes Removable media: No Prevent removal: No Readonly: No Backing store type: null Backing store path: None Backing store flags: Account information: ACL information: ALL
#scsi client install yum install iscsi-initiator-utils chkconfig iscsid on chkconfig iscsi on /etc/init.d/iscsi start /etc/init.d/iscsid start
#add #vi /etc/iscsi/iscsid.conf node.session.auth.username = iscsiadm node.session.auth.password = iscsiadm123 #修改客户端名字 vi /etc/iscsi/initiatorname.iscsi #InitiatorName=iqn.1994-05.com.redhat:1e12cf823426 InitiatorName=iqn.2014-11.dev.iscsi-initiator:initiator #发现 iscsiadm -m discovery -t sendtargets -p 192.168.55.158 192.168.55.158:3260,1 iqn.2014-11.dev.iscsi-target:iscsidisk #登陆 iscsiadm -m node -T iqn.2014-11.dev.iscsi-target:iscsidisk -p 192.168.55.158:3260 --login Logging in to [iface: default, target: iqn.2014-11.dev.iscsi-target:iscsidisk, portal: 192.168.55.158,3260] (multiple) Login to [iface: default, target: iqn.2014-11.dev.iscsi-target:iscsidisk, portal: 192.168.55.158,3260] successful. #退出 iscsiadm -m node -T iqn.2014-11.dev.iscsi-target:iscsidisk -p 192.168.55.158:3260 --logout Logging out of session [sid: 1, target: iqn.2014-11.dev.iscsi-target:iscsidisk, portal: 192.168.55.158,3260] Logout of [sid: 1, target: iqn.2014-11.dev.iscsi-target:iscsidisk, portal: 192.168.55.158,3260] successful. #查看连接 iscsiadm -m session tcp: [5] 192.168.55.158:3260,1 iqn.2014-11.dev.iscsi-target:iscsidisk (non-flash)
#查看 [root@localhost ~]# fdisk -l Disk /dev/sda: 12.9 GB, 12884901888 bytes 255 heads, 63 sectors/track, 1566 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0004c11a Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 1567 12069888 8e Linux LVM Disk /dev/mapper/VolGroup-lv_root: 11.1 GB, 11068768256 bytes 255 heads, 63 sectors/track, 1345 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/VolGroup-lv_swap: 1287 MB, 1287651328 bytes 255 heads, 63 sectors/track, 156 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sdb: 209 MB, 209715200 bytes 7 heads, 58 sectors/track, 1008 cylinders Units = cylinders of 406 * 512 = 207872 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000