Hot spare Puns

How do you set up a hot spare?
Per QLab manual: "You might have your Backup computer hooked up to your playback system, with a system in place to seamlessly switch over from the Main (this is often called a “hot spare” or “hot backup”)

Thanks

You read the title.

When was the last time a can of tyre-weld actually worked? Even a space-saver is better than that.

The only issues are

1. Added weight
2. Boot space is taken away (unless if you mount it underneath the car)
3. Some people may not know how to use it (the manufacturer could provide instructions)

I know space-savers work for at least a little while (as long as you don't drive too quickly), but I like the peace of mind knowing I have a proper spare wheel in case I get a flat.

EDIT: Thanks for all the upvotes and the comments, it's been quite interesting reading them. And it's spare wheels, not square.

For some added context, I live in the UK where 'smart' motorways are becoming a thing. If you don't know what that means, it means that the hard shoulder becomes another lane for traffic.

This means if you break down, you have to get your car over to a place to stop, and if you have a flat, that's quite hard.

This also means you're sitting in the middle of a lane, so trying to get a can of tyre-weld into your tyres with the possibility of a massive lorry running you over, which doesn't exactly seem fun to me.

I recently got a Synology DS1621+ with several drives. I have SHR with redundancy set up, but I have much more disk space than I currently need. I could easily disable a drive and still have the space I need.

Does it make a significant difference to the HDD life whether I use the disks in my SHR volume vs. leaving it as a hot spare, or even uninitialized?

I am seeking to get the Kakashi hoodie they have and only have 1 code this time around, so getting another one to cut its price in half would be awesome and appreciated.

If codes still have multiple uses I will gladly share the one I have afterwards my initial use.

Original post https://www.reddit.com/r/openzfs/comments/poiyqp/help_undo_resilvering_hot_spares/ that no body has replied too and still needs to be figured out

So I need help undoing what are HA system did to the zfs pool. There is a service zfs-zed that tries to replace failed disks with available hot spares. Well due to a problem with the HA system when a hot spare gets used to replace a disk it tells the system to reboot which cause the zfs system to hang and thinks the new spare disk is bad and grabs another. well I replaced 3 disk in this array and now I have all 4 spares trying to resilver to the new disks I just put in to replace dead disks with.

I am not to sure what commands I need to run to undo this resilvering and have it actually resilver the new disks I just put in.

The server is centos 7 with

zfs-0.8.4-1

zfs-kmod-0.8.4-1

I have turned off the zfs-zed.service so there is no changes going on right now. It has been a few days and the disks have finished resilvering so now I just need to undo all this hot spare nonsense

below is the zpool status currently

  pool: tank
 state: DEGRADED
status: One or more devices are faulted in response to persistent errors.
	Sufficient replicas exist for the pool to continue functioning in a
	degraded state.
action: Replace the faulted device, or use 'zpool clear' to mark the device
	repaired.
  scan: resilvered 1.45T in 0 days 09:57:38 with 0 errors on Wed Sep 15 20:14:28 2021
config:
	
        NAME                         STATE     READ WRITE CKSUM
	tank                         DEGRADED     0     0     0
	  raidz2-0                   DEGRADED     0     0     0
	    350000c0f01e0ff0c        ONLINE       0     0     0
	    35000c5005679c4cf        ONLINE       0     0     0
	    350000c0f012b1fa4        ONLINE       0     0     0
	    replacing-3              DEGRADED     0    95     0
	      spare-0                DEGRADED     0     0     0
	        35000c5005689eb2f    OFFLINE      6   176  275K
	        35000c500566fdf63    ONLINE       0     0     0
	      35000c50083def95f      FAULTED      0   105     0  too many errors
	    350000c0f01e06338        ONLINE       0     0     0
	    350000c0f01e02a18        ONLINE       0     0     0
	  raidz2-1                   DEGRADED     0     0     0
	    35000c50057183

> Example 11 Managing Hot Spares > > The following command creates a new pool with an available hot spare: > > > > # zpool create tank mirror sda sdb spare sdc > > > > If one of the disks were to fail, the pool would be reduced to the degraded state. The failed device > > can be replaced using the following command: > > > > # zpool replace tank sda sdd > > > > Once the data has been resilvered, the spare is automatically removed and is made available for use > > should another device fail. The hot spare can be permanently removed from the pool using the follow‐ > > ing command: > > > > # zpool remove tank sdc > >

I'm quite possibly missing something obvious here, but if I assign C as the hot spare, why did I replace the bad drive A with D ??? Where did D come from?

I'm really sorry that I'm posting this in this subreddit and I know that I really shouldn't, but does anyone have a spare 1:64 Hot Wheels Cybertruck (not opened and sealed) they'll be willing to sell? I would need it to be shipped to Austria in the EU. And I would give the chosen one a little bonus for their efforts.