How can you increase storage capacity when adding second disk to 2-bay NAS with an existing SHR volume?

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haggis999
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How can you increase storage capacity when adding second disk to 2-bay NAS with an existing SHR volume?

Unread post by haggis999 » Tue Mar 13, 2018 4:09 pm

I have just bought a 2-bay NAS (Synology DS218+) as an extension to my existing backup environment. At present, it has a single 8TB drive, configured as an SHR volume. This configuration was created before I realised that adding a second 8TB disk in the future to the SHR array would simply enable data protection without expanding the capacity of the NAS.

With hindsight, it might have been better for me to have created a JBOD or Basic volume, but I have already transferred over 1TB to this NAS and don't wish to start again from the beginning. Within the next week or so, I will be adding a third disk to each of my other two NAS units and converting them to SHR, but I don't plan to set up any data protection on my new DS218+.

When my data storage needs eventually get close to 8TB, what would be the easiest and quickest way to increase the capacity of the DS218+? For example, when I add a second disk can I use it to create a new Basic volume and then copy all data from disk 1 to disk 2, i.e. from SHR volume to Basic volume (followed by reformatting Disk 1 and changing it to a Basic volume)?
Primary storage - BonzoNAS: DS412+ with 3-disk SHR array (Btrfs, 3TB + 2 x 4TB WD Red drives)
Backup storage - BackupNAS: DS412+ with 3-disk SHR array (Btrfs, 3TB + 2 x 4TB WD Red drives) + BackupNAS2: DS218+, with one 8TB WD Red drive (Btrfs)

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HarryPotter
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Re: How can you increase storage capacity when adding second disk to 2-bay NAS with an existing SHR volume?

Unread post by HarryPotter » Tue Mar 13, 2018 4:25 pm

Why converting? SHR with 1 disk is the same as a basic volume.
*Please do not Private Message me for support questions; leave it on the forum so all members can learn. Thanks!*

DS718+ / DSM 6.2-23511 / ST4000VN000-2AH166 / SA400S37120G SSD cache /16 GB RAM
DS415+ / DSM 6.2-23511

LMS 7.9.1-166, 2 Squeezebox 3 + Boom

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haggis999
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Re: How can you increase storage capacity when adding second disk to 2-bay NAS with an existing SHR volume?

Unread post by haggis999 » Tue Mar 13, 2018 4:43 pm

HarryPotter wrote:Why converting? SHR with 1 disk is the same as a basic volume.
So does that mean when I add a second disk I will have the option to use it to simply create a second basic volume?
Primary storage - BonzoNAS: DS412+ with 3-disk SHR array (Btrfs, 3TB + 2 x 4TB WD Red drives)
Backup storage - BackupNAS: DS412+ with 3-disk SHR array (Btrfs, 3TB + 2 x 4TB WD Red drives) + BackupNAS2: DS218+, with one 8TB WD Red drive (Btrfs)

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Re: How can you increase storage capacity when adding second disk to 2-bay NAS with an existing SHR volume?

Unread post by HarryPotter » Tue Mar 13, 2018 5:16 pm

Yes.
*Please do not Private Message me for support questions; leave it on the forum so all members can learn. Thanks!*

DS718+ / DSM 6.2-23511 / ST4000VN000-2AH166 / SA400S37120G SSD cache /16 GB RAM
DS415+ / DSM 6.2-23511

LMS 7.9.1-166, 2 Squeezebox 3 + Boom

APC Smart UPS SUA750i

haggis999
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Re: How can you increase storage capacity when adding second disk to 2-bay NAS with an existing SHR volume?

Unread post by haggis999 » Tue Mar 13, 2018 5:23 pm

Thanks for that. I was confused by the fact that Storage Manager describes the volume as Synology Hybrid RAID, with no mention of it being equivalent to a basic volume.

I wish that all my NAS problems turned out to be imaginary :)
Primary storage - BonzoNAS: DS412+ with 3-disk SHR array (Btrfs, 3TB + 2 x 4TB WD Red drives)
Backup storage - BackupNAS: DS412+ with 3-disk SHR array (Btrfs, 3TB + 2 x 4TB WD Red drives) + BackupNAS2: DS218+, with one 8TB WD Red drive (Btrfs)

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Re: How can you increase storage capacity when adding second disk to 2-bay NAS with an existing SHR volume?

Unread post by mmhorda » Wed Mar 14, 2018 8:42 am

Hi.

I have something similar. Maybe some can help.
I have 2x4tb in my NAS. with created volume1. (SHR, btrfs) already almost full.
I just realized that I also have 1x3TB disk. I tried to extend the volume1 with it (seems like not even possible I din't know i can extend it with bigger or equal disks). So i have created for now Disk Group with just one drive and volume2 on it (SHR, btrfs).

Is there a way to actually extend volume1 with this 1x3TB disk? cause now i have it alone without data protection if it fails. Or maybe it is possible to redo everything without loosing data? so that all three disks would be in SHR? I cannot backup my data anywhere :(

Thank you in advance.

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Re: How can you increase storage capacity when adding second disk to 2-bay NAS with an existing SHR volume?

Unread post by HarryPotter » Wed Mar 14, 2018 10:08 am

No this is not possible because the disk is smaller.

And BTW: a disk group is not needed and doesnt make sense in your case.
*Please do not Private Message me for support questions; leave it on the forum so all members can learn. Thanks!*

DS718+ / DSM 6.2-23511 / ST4000VN000-2AH166 / SA400S37120G SSD cache /16 GB RAM
DS415+ / DSM 6.2-23511

LMS 7.9.1-166, 2 Squeezebox 3 + Boom

APC Smart UPS SUA750i

mmhorda
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Re: How can you increase storage capacity when adding second disk to 2-bay NAS with an existing SHR volume?

Unread post by mmhorda » Wed Mar 14, 2018 10:58 am

Thanks HP.
Could you please help me once more before I did something stupid? :-D

I have removed some not really needed data to fit 3TB disk and moving that data now there.
then
1. I will destroy volume1 (2x4tb)
2. create volume3 on 1x4tb disk. (not touching second)
3. move data from 3tb disk to volume3
4. create new volume1 with 3tb + 4tb (second disk) (since volume1 was already destroyed before I hope it will let me create it again)
5. move data from volume3 to newly created volume1 (3tb + 4tb disks)
6. remove volume 3
7. expand volume1 with 4tb disk.

I hope that works right?

Thank you in advance :)

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Re: How can you increase storage capacity when adding second disk to 2-bay NAS with an existing SHR volume?

Unread post by HarryPotter » Wed Mar 14, 2018 11:15 am

Yes it does, but you will loose all packages nstalled on volume1.
And I would simply expand volume 2. There is no need to recreate volume1.
*Please do not Private Message me for support questions; leave it on the forum so all members can learn. Thanks!*

DS718+ / DSM 6.2-23511 / ST4000VN000-2AH166 / SA400S37120G SSD cache /16 GB RAM
DS415+ / DSM 6.2-23511

LMS 7.9.1-166, 2 Squeezebox 3 + Boom

APC Smart UPS SUA750i

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