Why is ZFS ID so long?

[joeschmuck]

I've been looking at how to replace a drive and what shocks me is when you perform a 'zpool status' command, the output looks like this for me.

Code:

freenas# zpool status
  pool: storage
 state: ONLINE
 scrub: none requested
config:

        NAME                                            STATE     READ WRITE CKSUM
        storage                                         ONLINE       0     0     0
          raidz1                                        ONLINE       0     0     0
            gptid/0a97f8bd-b024-11e0-9509-001966a308e1  ONLINE       0     0     0
            gptid/0b85f2f0-b024-11e0-9509-001966a308e1  ONLINE       0     0     0
            gptid/0c5d84bf-b024-11e0-9509-001966a308e1  ONLINE       0     0     0
            gptid/0d4240cf-b024-11e0-9509-001966a308e1  ONLINE       0     0     0

errors: No known data errors

So why is my identifier so darn long "gptid/******...." ? I don't even know what this long number represents.

So now I'm asking for some help because I'd like to use a more manageable name like ada0, ada1, etc... like so many examples I've seen on the web.

I was trying to replace a drive but had no luck and ended up destroying my pool. No big deal, two days of data transfers will bring it back to full use but I think while I'm playing around with the pools that only a few GB's are in order until I'm done.

I actually am running 64-bit Beta-4. Tag line tells the rest of the system.

-Mark

 

[matthewowen01]

so it's unique.

here is a thread on how to revert to the 'normal' labels,

 

[joeschmuck]

That was Fast.... Thanks, I'll give that a shot. You must have have this problem before to answer so quickly.

-Mark

UPDATE: That works like a charm. Here are the changes...

If Zpool status reports long gptid values for each drive, modify /boot/loader.conf as follows:


mount -uw /

cd /boot
ee loader.conf


add the following two lines:

kern.geom.label.gptid.enable=0
kern.geom.label.gpt.enable=0

Escape and save, reboot.

Now try zpool status, much better.

This would be nice as the default setting.

 

[Milhouse]

so it's unique.

here is a thread on how to revert to the 'normal' labels,

Thanks.

This would be nice as the default setting.

Worked for me too, "zpool iostat -v" is now much more readable! :)

Unfortunately the "View Disks" GUI continues to show the old identifiers eg. "{uuid}9919eae2-92b2-11e0-aa4b-001b2188359c" (this is 8.0.1-BETA3).

This would be nice as the default setting.

100% agreed.

 

[Brand]

That was Fast.... Thanks, I'll give that a shot. You must have have this problem before to answer so quickly.

-Mark

UPDATE: That works like a charm. Here are the changes...

If Zpool status reports long gptid values for each drive, modify /boot/loader.conf as follows:


mount -uw /

cd /boot
ee loader.conf


add the following two lines:

kern.geom.label.gptid.enable=0
kern.geom.label.gpt.enable=0

Escape and save, reboot.

Now try zpool status, much better.

This would be nice as the default setting.

I beat you to it and already posted a Disable gpt/gptid labels how to it already in the How-To Guides Section. :p

 

[Milhouse]

I beat you to it and already posted a Disable gpt/gptid labels how to it already in the How-To Guides Section. :p

Would have been better if you'd given attribution.

 

[Brand]

Would have been better if you'd given attribution.

I completely agree and guess it slipped my mind in the wee hours of the morning. I will be editing the How-To and giving proper attribution. Thanks for pointing it out.

 

[joeschmuck]

Yes, beat me to it and I didn't even think to put it in the How To's area. Good on you.

 

[Brand]

Even though I beat you to it I wouldn't have created it if you hadn't written your initial post. I am just wanting to clean up the How-To Guides section that is littered with people asking for help rather that actually posting How-To Guides.

 

[joeschmuck]

Yes, I agree, it's terrible. We need a moderator that is willing to clean it up. I've seen other sites where How-To Guides is nice and clean, well laid out. I know we are off the topic a bit. I think the question has been answer, I know I'm happy.

 

[pauldonovan]

Are you guys really sure that getting rid of the large gptids is such a good idea? AFAIK the devs switched to this mode for the first beta of 8.01 to help people whose hardware had changed and the drives were being mis-identified because they'd moved SATA port or controller. The mode they're using now avoids that issue. I don't think telling people how to do this is a wise idea as they'll be screwed if they have to change SATA hardware. I'm not sure the devs will appreciate the extra support issues either.

Paul