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ReadyNas 426 - Behaviour when upgrading drives
Hi,
I'm currently in the process of upgrading 6 10TB Toshiba N300 drives to 6 18TB Toshiba MG09 drives.
The first one I replaced took around 20 hours to 'Resync Volume', as expected.
The second drive took around 22 hours to 'Resync Volume', however now 'Resync Data' is taking place which appears will take a long period of time (I have just over 36TB of data on the volume).
I've also noticed that following the 'Resync Volume' on the second drive the volume has increased in size based on the additional capacity of the second drive!
Is this expected as all documentation I've read states the volume wouldn't increase in size until I've replaced all drives in the array and rebooted?
Thanks,
Carl.
carlpea wrote:
This is the info I was referring to:
https://kb.netgear.com/21415/How-do-I-expand-an-existing-X-RAID-volume-with-larger-disks
Replace one disk at a time with a larger disk, letting it finish initializing and syncing after each replacement (this process can take several hours depending on disk capacity, but you can continue access to the ReadyNAS), and after the last disk has been replaced, reboot the ReadyNAS. The expansion will occur at boot time.
That looks like it applies to 4.1.x firmware - if so it's very old. XRAID in all newer NAS (4.2, 5.3, 6.x) supports unequal-size disks.
Marc_V , JeraldM: Can you request that this article be corrected (or perhaps deleted).
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carlpea wrote:
I've also noticed that following the 'Resync Volume' on the second drive the volume has increased in size based on the additional capacity of the second drive!
Is this expected as all documentation I've read states the volume wouldn't increase in size until I've replaced all drives in the array and rebooted?
Don't know what you are reading, but this is usual behavior for XRAID.
You started with a 6x10TB RAID-5 group. The system is adding a second RAID group, and concatenates the two groups together. Right now that second group is 2x6TB RAID-1; it will end up 6x6TB RAID-5 when the process completes.
carlpea wrote:
The first one I replaced took around 20 hours to 'Resync Volume', as expected.
The second drive took around 22 hours to 'Resync Volume', however now 'Resync Data' is taking place which appears will take a long period of time (I have just over 36TB of data on the volume).
The amount of data on the volume isn't relevant to these times. Every sector on every drive is either read or written when you replace or upgrade a disk. Note this means that the times will get longer as you upgrade more disks.
If one of the already unstalled disks fails during this process, you will lose your data. Hopefully you followed Netgear's recommendation to update your backup first,
Yes, I've backed up the important data.
I'm also running the full 24 hour self test on each new drive before adding it to the ReadyNas.
This is the info I was referring to:
https://kb.netgear.com/21415/How-do-I-expand-an-existing-X-RAID-volume-with-larger-disks
Replace one disk at a time with a larger disk, letting it finish initializing and syncing after each replacement (this process can take several hours depending on disk capacity, but you can continue access to the ReadyNAS), and after the last disk has been replaced, reboot the ReadyNAS. The expansion will occur at boot time.
carlpea wrote:
This is the info I was referring to:
https://kb.netgear.com/21415/How-do-I-expand-an-existing-X-RAID-volume-with-larger-disks
Replace one disk at a time with a larger disk, letting it finish initializing and syncing after each replacement (this process can take several hours depending on disk capacity, but you can continue access to the ReadyNAS), and after the last disk has been replaced, reboot the ReadyNAS. The expansion will occur at boot time.
That looks like it applies to 4.1.x firmware - if so it's very old. XRAID in all newer NAS (4.2, 5.3, 6.x) supports unequal-size disks.
Marc_V , JeraldM: Can you request that this article be corrected (or perhaps deleted).
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