在ESXi 5.0 啓用了軟ISCSI後，並且掛載了大的目標卷，如果這個LUN不能到達就會導致啓動緩慢，等其啓動後在sysboot.log 中看到以下內容：
[01:57:50.925338] sysboot: software-iscsi
[02:28:22.330320] sysboot: restore-paths
iscsid: cannot make a connection to 192.168.1.20:3260 (101,Network is unreachable)
iscsid: Notice: Reclaimed Channel (H34 T0 C1 oid=3)
iscsid: session login failed with error 4,retryCount=3
iscsid: Login Target Failed: iqn.1984-05.com.dell:powervault.md3000i.6002219000a14a2b00000000495e2886 if=iscsi_vmk@vmk8
addr=192.168.1.20:3260 (TPGT:1 ISID:0xf) err=4
iscsid: Login Failed: iqn.1984-05.com.dell:powervault.md3000i.6002219000a14a2b00000000495e2886 if=iscsi_vmk@vmk8
addr=192.168.1.20:3260 (TPGT:1 ISID:0xf) Reason: 00040000 (Initiator Connection Failure)
解決辦法：需要安裝ESXi500-201111001補丁程序