Help I accidentally deleted the first partion on my USB boot drive

[tris]

Hi , please help while trying to figure out why my 3tb drive's in enclosures where showing as 800gb instead of there full amount I ran the following . gpart delete -i1 da0 . it should have been da1 . Any way I can recover the partion , this is a live box on site , so a bit worried at the moment.

 

[Fraoch]

I don't believe there's anything you can do other than reinstall FreeNAS onto another USB key (or that USB key). I can't think of any way around going to the site and getting physical access.

While it's still up, make sure you take a backup of the configuration. Once you reinstall FreeNAS, use that backup file.

Also you may want to take two USB keys to the site and use another one to mirror the boot drive. If boot mirroring was used here, you wouldn't require physical access to the server if this happened again - you would just detach the drive and re-attach it from the GUI, causing a resilver.

 

[sef]

You can try:

1. gpart add -i 1 -s 512k -t bios-boot da0
2. grub-install --modules="zfs part_gpt" /dev/da0

No guarantees, but if all you did was accidentally delete the partition, that's got a reasonable chance of working.

Be sure to backup your configuration first.

 

[tris]

Just wondering , went on site today , rebooted the box , and used F2 to boot into freenas , my config and everything was there . Is da0s1 duplicated on da0s2 . What is on each of the 4 partions FreeNas creates.

 

[cyberjock]

No, each of the two partitions take turns being bootable. For example, on first install s1 is bootable. When you do an upgrade s2 is made bootable. This is so that if you do an upgrade and it goes sideways you can easily revert.

 

[Fraoch]

No, each of the two partitions take turns being bootable. For example, on first install s1 is bootable. When you do an upgrade s2 is made bootable. This is so that if you do an upgrade and it goes sideways you can easily revert.

That's actually pretty awesome - mirroring on the same drive!

 

[sef]

Oh, you're on 9.2. Disregard what I said.