How to reattach Fibre channel drive when server reboots

Question

I have two servers connected via point-to-point Fibre Channel (QLogic cards). The file server is running FreeBSD and has the iSCSI Target The other is running Debian and is the Initiator. The target from the fileserver shows up as /dev/sdb on the Debian server.

Everything works fine except that if I reboot the fileserver, the Debian server loses the connection.

I can force it to rescan by issuing the command echo 1 > /sys/class/fc_host/host1/issue_lip But then it shows up as /dev/sdc

Is there a better way to restore the mount?

Maybe iSCSI is the wrong term. But from everything I find on google, the target config is like setting up iSCSI but you give the target a port of "isp" to bind it to the FC HBA. — dwilliss, Dec 26 '17 at 16:14
You're massively out of your depth here if you don't know the basics of what you're trying to do - perhaps get someone in to help you as you're going to struggle fumbling your way forward — Chopper3, Dec 27 '17 at 12:19
Maybe read what this site is and isn't for if you would please. — Chopper3, Dec 28 '17 at 15:19
"Q&A for system and network administrators" That's what this group is for. Never mind - I'll try the Unix and Linux group. — dwilliss, Dec 29 '17 at 01:25

score 1 · Accepted Answer · answered Dec 29 '17 at 01:54

The solution turns out to be to mount the drive by UUID, not /dev/sdX1.

You can look in /dev/disk/by-uuid to find the UUID that is a symbolic link back to the partition you want. Then in the host file, mount it using:

UUID=whatever-the-uuid-is-here  /mountpoint  ext4  defaults 0 0

How to reattach Fibre channel drive when server reboots

1 Answers1