UFS How to mount an iSCSI block device?

K

kalevik

Hello!

I got this in /etc/fstab

/dev/ufs/iscsi_freebsd /mnt/iscsi ufs late,rw 2 2

but during boot I get kernel error, probably because the iSCSI subsystem is not up yet
when FreeBSD tries to mount /mnt/iscsi. If I mount it manually after the boot, it works.

Could you please tell me what is the proper way to mount iSCSI block devices? Thanks!

br,
KK
 
kalevik said:
/dev/ufs/iscsi_freebsd /mnt/iscsi ufs late,rw 2 2
Click to expand...
Maybe instead of late you could try failok flag.

Another way around the problem is use rc.conf and netwait.
Wait on bootup for iscsi IP to come up.

### Network link/usability verification options
netwait_enable="NO" # Enable rc.d/netwait (or NO)
#netwait_ip="" # Wait for ping response from any IP in this list.
netwait_timeout="60" # Total number of seconds to perform pings.
#netwait_if="" # Wait for active link on each intf in this list.
netwait_if_timeout="30" # Total number of seconds to monitor link state.
netwait_dad="NO" # Wait for DAD to complete
netwait_dad_timeout="" # Total number of seconds to wait for DAD, zero
# or unset to autodetect
Click to expand...
 
I'm curious about the kernel error... because if this happens during boot I can't help but wonder if this could be a driver issue. Although the kernel can automatically load required kernel modules, this proces behaves a bit different during boot; and it's good practice to add kernel modules that are needed during boot phase to /boot/loader.conf so that they get loaded right away.

Do note: this is a guess on my end.
 
kalevik said:
I got this in /etc/fstab

/dev/ufs/iscsi_freebsd /mnt/iscsi ufs late,rw 2 2
Click to expand...
My way is different. I use the iSCSI IP/path as device. You are using a UFS device label.
late with faiilok should work.
Personally I would add a mountpoint directory outside of /mnt.

/etc/rc.local is a good choice for problems.. Add some sleep time to this before if still troublesome.
ShelLuser

Solved Post in thread 'How to automatically mount iSCSI disk after booting'

hdc said:
The problem is that in case any network or iSCSI server failure, the iSCSI disk could lost connection.
In that time if FreeBSD rebooting, the system booting will be stopped by iSCSI mounting in fstab.
Click to expand...
Look into fstab(5). You could consider using options such as failok. This will ensure that any possible errors during mounting are ignored so that the system will boot no matter what.
 
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