Solved How to fix device name for iscsi disk

[hdc]

I am using 2 or more iscsi disk in FreeBSD.

I dont know how to fix the device name to particular disk.

For example:


Target name Target portal State
iqn.2017-08.freenas:freebsd02 192.168.1.1 Connected: da3
iqn.2017-08.freenas:freebsd01 192.168.1.2 Connected: da4


The da3 and da4 were assigned by FreeBSD automatically.

I guess the number could be changed by booting. for example in case the target freebsd02 no connection then freebsd01 would be assigned to da3 instead of da4.

can I have a way to assign them the fixed device name?

 

[driesm]

You can achieve this by labeling your disks with geom-glabel.
Then you can address your drives /dev/da0 ... as /dev/label/xxx.
The label will not change in between reboots.

 

[hdc]

You can achieve this by labeling your disks with geom-glabel.
Then you can address your drives /dev/da0 ... as /dev/label/xxx.
The label will not change in between reboots.

I dont think it would work since my problem is that one iscsi disk would be load as da0 or da1. I could not control it.
To label da0 would not solve problem.

 

[SirDice]

The device names are irrelevant if you refer to the labels, the labels will always be the same, regardless if the disk is actually da0, da1 or even da99.

 

[hdc]

Sorry to Duffyx, I made mistake.

But the glabel is not working. Maybe not available for iSCSI disk?

$ sudo glabel label idata1 /dev/da4
glabel: Can't store metadata on /dev/da4: Operation not permitted.

$ sudo glabel label idata2 /dev/da4p1
glabel: Can't store metadata on /dev/da4p1: Operation not permitted.

da4p1 was mounted as:

/dev/da4p1 on /foo (ufs, local, soft-updates)

 

[phoenix]

If you are using GPT to partition the disk, then don't use glabel(8). Instead, use gpart(8) to label the GPT partition directly (it's built-in to GPT).

# umount /dev/da4p1
# umount /dev/da3p1
# gpart modify -i 1 -l idata1 da4
# gpart modify -i 1 -l idata2 da3
# mount /dev/gpt/idata1 /foo1
# mount /dev/gpt/idata2 /foo2

The -i 1 tells it to modify the first partition. The -l idata* tells it to add a label to that partition.

GPT labels create device nodes under /dev/gpt so you can reference those anywhere you would normally reference the disk device.

You can view the partition table with # gpart show da4 and you can view the labels with # gpart show -l da4

 

[hdc]

If you are using GPT to partition the disk, then don't use glabel(8). Instead, use gpart(8) to label the GPT partition directly (it's built-in to GPT).

# umount /dev/da4p1
# umount /dev/da3p1
# gpart modify -i 1 -l idata1 da4
# gpart modify -i 1 -l idata2 da3
# mount /dev/gpt/idata1 /foo1
# mount /dev/gpt/idata2 /foo2

The -i 1 tells it to modify the first partition. The -l idata* tells it to add a label to that partition.

GPT labels create device nodes under /dev/gpt so you can reference those anywhere you would normally reference the disk device.

You can view the partition table with # gpart show da4 and you can view the labels with # gpart show -l da4

Thanks, it is working fine.