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Synology DiskStation DS1515+ NAS Review

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Synology DiskStation DS1515+ NAS: Testing Features

RAID Data Protection:

The Synology DiskStation DS1515+ is a five drive bay system that can support up to five 8TB drives. For the RAID options, you can choose from either one or a mixture of RAID 0, 1, 5, 6, 10, or Synology Hybrid RAID. The DS1515+ boasts uninterrupted access to data for any business need. We’ll test the ability of the DS1515+ to recover from a single failed drive in both RAID 1 and RAID 5 configurations. For both configurations, I copied over 7GB of random files to show true "usage" and I simulated a "failure" by removing a disk drive from the unit while powered on. Since the server supports hot-swapping drives, you can remove and replace drives without having to power the unit down. I then replace the "failed" disk with another from a hot-swap bay and measure the time it takes to fully recover from the failure.

For the RAID 1 test, I used disks one and two to create the RAID with drive three as a "hot-spare." I then manually removed drive two from the hot-swap bay and let the system use the hot-spare drive to rebuild the array, monitoring the time it took to complete. When drive two was removed, the DS1515+ started beeping to alert to an issue. The Web UI showed the RAID in a degraded state and I also received several emails about the RAID issue. Promptly the system pulled in drive three to the RAID array and started to rebuild. At this time the alarm stopped and I received several more emails that the hot-spare was used and the RAID was being repaired. The repair lasted 10 hours and 26 minutes until it was fully complete.

 

 

 

For the RAID 5 tests, I used disks one through four to build the RAID and set up disk five to be the hot-spare. I then did the same manual process of removing drive two from the RAID and allowed drive five to be used to recover. The same alarm and emails were activated, showing the degraded array and the repairing process. I again measured the time it took to rebuild the RAID array fully. To fully repair the RAID 5, it took 12 hours and 27 minutes.

 

 

 

RAID Expansion/Migration:

The Synology DS1515+ offers RAID Expansion/Migration seamlessly, as well. From the volume section, you can choose to change the RAID type to another (your data will be deleted) or you can expand the disks in the RAID to add more space or redundancy with little effort.

 

 

 

 

 

Now that we have recovered the RAID and expanded it, we can move on to the conclusion.




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