How to migrate from two disk stripe volume to one big HDD?

[guglez]

Hi All,


I have a stripe made from two 1T disks. One disk is going to fail soon. I have one big HDD (3.5T) and I want to migrate the data to it. How can I achieve this?


Thank you!

 

[BigDave]

Assuming you can...
Within FreeNAS, use the larger drive and configure a second pool and copy
the data to the new pool.
But I must warn you that IF your "sick" drive dies at any time going forward,
you will lose your data on the striped pool...

 

[Ericloewe]

Replicate to the new pool and destroy the old one.

 

[joeschmuck]

Also, you shouldn't use a single hard drive and hopefully you are aware of the risks.

 

[guglez]

Replicate to the new pool and destroy the old one.

I tried to do that. Failed. Here is what I did:


zfs snapshot -r black-wd1t-stripe@full-stripe-snapshot
zfs send -R black-wd1t-stripe@full-stripe-snapshot | zfs receive -Fdvu ext-green-4T

receiving full stream of black-wd1t-stripe@full-stripe-snapshot into ext-green-4T@full-stripe-snapshot
received 45.2MB stream in 2 seconds (22.6MB/sec)
receiving full stream of black-wd1t-stripe/images@full-stripe-snapshot into ext-green-4T/images@full-stripe-snapshot
.....
receiving full stream of black-wd1t-stripe/mmedia@full-stripe-snapshot into ext-green-4T/mmedia@full-stripe-snapshot
warning: cannot send 'black-wd1t-stripe/mmedia@full-stripe-snapshot': Input/output error


Or should I just copy the data with rsync? I'm ok ifsome files will be lost.

 

[danb35]

warning: cannot send 'black-wd1t-stripe/mmedia@full-stripe-snapshot': Input/output error

That's a bad sign.

Or should I just copy the data with rsync? I'm ok ifsome files will be lost.

It's worth a try.

 

[danb35]

Also, you shouldn't use a single hard drive and hopefully you are aware of the risks.

Better than two drives striped.

 

[joeschmuck]

Better than two drives striped.

I don't see the difference, any single drive failure is total data loss.

 

[danb35]

Sure, but with two disks striped, the risk is doubled--if either of two disks fails you lose all your data. With a single disk, it's only that one disk that's critical. But, of course, a redundant arrangement is much safer.

 

[joeschmuck]

Ah, the "odds game". I just watched a movie about odds. It was more on card counting but odds was the scientific driver.

 

[guglez]

I just reinstalled from scratch everything.