upgrade to larger discs

Discussion on setting up QNAP NAS products.
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mariachi76
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Posts: 42
Joined: Sun Feb 19, 2012 11:13 pm
Location: Austria

upgrade to larger discs

Post by mariachi76 » Mon Apr 06, 2020 7:38 am

Hello,
I have a TS-851 with 8x4TB WD Red discs installed. Discs are arranged in a Raid-6 / single volume.
Since free space is getting low, I would like to upgrade to larger discs, ideally starting with 5x12TB, also in Raid6.

Most people would make a full backup, remove the old HDDs, install the new HDDs, initialize the NAS and copy data back. But that would mean a downtime of around one week I would guess.
Is there another way without so much downtime? Does the replace disk one by one" work if I replace 8x4TB with 5x12TB? Or does it only work with the same number of discs, i.e. in this cas 8x12TB?

Or is there any other way to replace 8x4TB with 5x12TB without downtime >12 hours?

best regards
mariachi76
TVS-872XT, 5xExos 16TB Raid6, 2xCruciual NVMe 1TB
TS-851, 8GB RAM, 8x4TB WD Red Raid5 for Backup

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Don
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Posts: 11998
Joined: Thu Jan 03, 2008 4:56 am
Location: Long Island, New York

Re: upgrade to larger discs

Post by Don » Mon Apr 06, 2020 10:57 am

There is no way to reduce the number of disks in a RAID array. To go from 8 disk to 5 disks you need to backup and start over.
Read the Online Manuals and use the forum search feature before posting.

It is a recommended to use RAID and have external backups. RAID will protect you from disk failure, keep your system running, and data accessible while the disk is replaced and the RAID rebuilt. Backups will allow you to recover data that is lost or corrupted, or from system failure. One does not replace the other.

Submit bugs and feature requests to QNAP via their Helpdesk app.

NAS: TVS-882BR | F/W: 4.3.6.0895 | 40GB | 2 x M.2 SATA RAID 1 (System/VMs) | 4 x M.2 NMVe QM2-4P-384A RAID 5 (Cache) | 5 x 4TB HDD RAID 6 (Data) | 1 x Blu-ray
NAS: TVS-663 | F/W: 4.4.1.1086 | 16GB | 2 x M.2 NMVe QM2-2P RAID 1 (Cache) | 4 x 4TB RAID 5
Apps: Boinc, Squid, DNSMasq, PLEX, iDrive, QVPN, QLMS, MP3fs, HBS, Entware, DLstation, +others

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