如何查找dev目录下磁盘设备的iscsi来源

问题，连接了多个iscsi的lun，不知道/dev下哪一个设备对应哪个iscsi来源。

步骤：

1.安装udev和lsscsi

sudo apt-get install -y udev lsscsi

2.列出iscsi设备

lsscsi

输出：

[2:0:0:0] disk ATA ST3500514NS SN12 /dev/sda

[4:0:0:0] disk iSCSI IP SAN 0 /dev/sdb

可知/dev/sdb是iscsi设备

3. 查找/dev/sdb的实际路径

udevadm info -q path -n /dev/sdb

输出：

/devices/platform/host4/session1/target4:0:0/4:0:0:0/block/sdb

4.查找实际路径对应的iscsi来源

udevadm info -q env -p /devices/platform/host4/session1/target4:0:0/4:0:0:0/block/sdb

输出：

DEVLINKS=/dev/disk/by-id/scsi-169534353490000000000000003000000569e0d000f000000 /dev/disk/by-path/ip-192.168.1.12:3260-iscsi-iqn.2004-05.storos.t-3-lun-0

DEVNAME=/dev/sdb

DEVPATH=/devices/platform/host4/session1/target4:0:0/4:0:0:0/block/sdb

DEVTYPE=disk

ID_BUS=scsi

ID_MODEL=IP_SAN

ID_MODEL_ENC=IP\x20SAN\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20

ID_PART_TABLE_TYPE=dos

ID_PATH=ip-192.168.1.12:3260-iscsi-iqn.2004-05.storos.t-3-lun-0

ID_PATH_TAG=ip-192_168_1_12_3260-iscsi-iqn_2004-05_storos_t-3-lun-0

ID_REVISION=0

ID_SCSI=1

ID_SERIAL=169534353490000000000000003000000569e0d000f000000

ID_SERIAL_SHORT=69534353490000000000000003000000569e0d000f000000

ID_TYPE=disk

ID_VENDOR=iSCSI

ID_VENDOR_ENC=iSCSI\x20\x20\x20

MAJOR=8

MINOR=16

SUBSYSTEM=block

UDEV_LOG=3

USEC_INITIALIZED=12779741