For the moment i've 1 4TB HDD on my synology DS1513+. I'm transfering all my data on it but when this HDD will be full, i'll add a second 4TB HDD.

How to have 1x8TB and not 2x4TB on my synology without losing data just by "resizing" volume1 ?

And same for 1x(sum of all HDD capacity) instead of 5x(HDD capacity) ?

  • 1
    Anyway, a possible solution would be a RAID in striping mode (thus this requires to have the disks when you set up the RAID array) or a LVM (that allows you to add more disks later on, but then you either need a filesystem that supports resizing or you need to distribute your data over multiple partitions). Source : Abrixas2 from stackoverflow.com
    – locobastos
    Jun 15, 2014 at 10:36

1 Answer 1


If your volume is using Synology Hybrid Raid (SHR) adding a drive is very easy. See this tutorial. That is what I did when I went from 3 to 4 HDD's in my DS411+ii. You can set up a SHR array with just one disk if that is not what you are currently using. Keep in mind with just one disk you will not have redundancy. With 2 4TB HDD's only 4TB will be available on the SHR array, but you will have redundancy. The volume will expand once you have 3 or more 4TB HDD's, but since you have a 5 bay device I imagine you planned on expanding anyway.

In response to your comment: If you do not want redundancy but do want the ability to expand the disks later, set up your volume as JBOD. According to the first tutorial in section 2: "DiskStation supports expanding capacity of volumes and Disk Groups with the following RAID types: Synology Hybrid RAID (SHR), JBOD, RAID 5, RAID 5+ Spare, and RAID 6." Thus, the only option which allows expandability without redundancy is JBOD. This tutorial will show you how to create a JBOD volume if yours is not currently one.

  • Why "with 2 4TB HDD's only 4TB will be available on the SHR array" ? It's true even if i don't want any data redundancy ?
    – locobastos
    Jun 15, 2014 at 17:33
  • Thx for the tutorial !!!
    – locobastos
    Jun 15, 2014 at 17:34
  • See updated answer.
    – Solitz
    Jun 15, 2014 at 18:22
  • I'll work to follow your edited answer, then vote up if success your answer :)
    – locobastos
    Jun 15, 2014 at 23:27

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