Migrating from TS-462 to TS-464

English General
1

Hello.

I have a TS-462 NAS, running QTS 5.2.9.3451, 16GB of RAM (DDR4 2666), RAID 0 cache (256GB SSD M.2 x 2), RAID 5 (4TB HDD x 4).
I ordered a TS-464-8G NAS.

QUESTION: What is the correct way to migrate from a TS-462 to a TS-464-8G?
Can I do it in the following order:

  1. Install a spare 1TB HDD on the TS-464-8G, boot it, and update the firmware to the latest version;
  2. Turn off the TS-462 and remove all HDDs and SSDs in the correct order;
  3. Upgrade the TS-464-8G memory to 16GB (DDR4 3200), install the SSD and HDD in the correct order;
  4. Run the TS-464.

Is this approach correct?

Or will I have to back up the data from the TS-462, then move the drives to the TS-464 and configure everything from scratch?

2

Update the new NAS to the same Firmware you have on the old one (use a spare disk for that, you remove that disk after)

Disable and remove the cache (and never use it again…RAID0 for cache is nothing short of suicidal)

Move all disks over to the new NAS and start it up

Most important of all, have full backups at all times and not just when you need backups (RAID0 cache would make your data dissappear faster than you think)

3

Thank you for your reply.
You answered the main question specifically and clearly.

I kindly ask you to answer the second question.

The TS-462 has 2 SSD M.2 by 256Mb with maximum read/write capacity (300TBW).
These SSDs are connected as a cache with settings:
Cache type: Read-only
Cache mode: The entire I/O subsystem (Recommended for media streaming)
To increase the cache size, SSDs are combined into RAID 0.

Connection logic:

  1. Family members use TS-462 for 90% as a media server. In the evenings, the peak load is up to 10 media viewing connections.
  2. Read-only cache. The more of it, the better for the system. I understand that if one of the disks in RAID 0 dies, the entire cache will die. I could combine the SSD into RAID 1 to avoid sudden cache loss, but this would reduce its volume. RAID 0 or RAID 1 cache - in any case, I think this will only affect streaming, but not data and its security, because the cache is not involved in writing data.

QUESTION 1: Am I wrong?
QUESTION 2: Which cache for media streaming do you recommend? Or should I turn off the cache altogether and not use it?

For information: I notice an active use of the SSD cache when the system is conducting a full virus scan and when testing RAID 5.

4

  • QTS cache is broken, in most cases it slows NAS access down (many topics about it)

  • Cache is useless for media streaming, as the read blocks do not repeat (cache would help for databases, VM images, etc)

  • Even broken read cache will lock your volume and disable access, manual intervention via SSH is needed then

  • Disable the antivirus, it’s a resource hog and does not protect the NAS (not an on demand scanner and does not protect the NAS itself)

5

Yeah, no cache. Not a good idea.

6

I bought a new QNAP NAS. How do I move my data over from the old one? | QNAP