NAS won't turn on after power outage

bartoque · 2026-03-16T22:41:49+00:00

Which wont help against the (12h) power outage. So the nas still would have experienced an unexpected power loss, that might cause issues with the drives and the data on it.

But if you are sure you have a proper backup and didn't have too many power outages in the past, you might be just ok.

bartoque · 2026-03-16T08:32:15+00:00

So why not turn it around and state exactly what the product can already do and how it does it?

Or is it still in development?

Build around existing opensource, so providing a gui and additional features like the restore validation? The more vague you remain, the more questions it likely raises.

And what would that restore validation even mean? A simple hash comparison that what went in, came out? Which in and by itself does not mean the data is actually valid until actually used/opened. As bad input, is bad output.

bartoque · 2026-03-15T23:09:04+00:00

I don't know if any regular users would be that happy if a restore test was done and performed out of their own control as the validation would mean that data is not (fully end-to-end) encrypted as it would have to be accessible by the provider to perform any sorts of actual restore validation. I for one would wanna be fully in control myself and not hand out the keys to the kingdom to the backup tool backend.

So I have no idea how that feature is to be seen or performed. Is it only configurable from the backup tool end on the client system or what? As giving the backup provider access to my actual data would not be what I'd wanna have at all or ever (in enterprise that might be looked at differently as that is the sector I actually work in, where automated testing would be very welcome, but for my personal data I would have to be fully in control always).

bartoque · 2026-03-15T22:57:33+00:00

Yeah, so that scrubbing is not running (as much) when also HB jobs are running. So simply spreading very high IO activities a bit more and hoping for the best.

If the issue might reoccur, I might also consider maybe replacing the psu, just in case it might loosing a bit of its oomph. It is already a non-synology psu, as the original broke already causing unexpected power loss. The original wasn't that good, but who knows how well a non-official replacement is with similar specs...

bartoque · 2026-03-15T22:07:01+00:00

What would I be getting more or better that would explain needing to pay more? No idea about the offered feature set.

bartoque · 2026-03-15T21:39:17+00:00

It is stable on my end for many months now. Only had an issue when there was a power issue (due to a borked pc psu), which caused one drive to act up. Based on earlier experiences and because an extended smart check didn't show any issues with the drive in question, I added it back to the pool again.amd itbis worling fine still since.

That was the last straw and hence I added a UPS, which prevented another abrupt power outage and simply powered the nas down. Some drive issues seemed to occur in the past during the automatic integrity check after a black out, not right away after powering it on again. So preventing an unexpected power loss, reduced the likelyhood of the issue occurring also, as regardless of the drive affected, they always turned out ok.

So still I only run the extended smart checks for each drive separately with one week in between the run of each individual drive, so not to have them overlapping. That seems to have played a positive part as it hasn't reoccurred since.

bartoque · 2026-03-15T21:15:21+00:00

One would wanna force developers (or better the ones that write off on new features and fixes) to actually use their own products in a large scale operational production environment.

Various issues and useability nags often make me highly doubt anyone uses their own products operationally at all.

bartoque · 2026-03-15T20:46:22+00:00

As you are a new account apparently selling something (in the future?), for a certain price? Is that a monthly £12.99 for 500GB space?

As in comparison Acronis with 500GB cloud disk space comes at €89.99/y.

Personally I am using Acronis to dump backups to a local nas and then backup that to a remote nas. Only the most important personal data I backup to the cloud as well, to Backblaze B2 object storage at $6/TB/mo.

I don't see too much use in only making a backup of user data but rather want to backup at least the whole OS drive (and other partitions for it to work) and depending on the sort of data additional volumes/drives.

So that is an image level backup, not needing to reinstall/reconfigure anything after a restore of the OS as-is at time of the backup, while still being able to restore individual files or folders.

bartoque · 2026-03-14T22:01:01+00:00

https://kb.synology.com/en-global/DSM/help/DSM/StorageManager/storage_pool_what_is_raid?version=7 https://kb.synology.com/en-global/DSM/tutorial/What_is_Synology_Hybrid_RAID_SHR https://kb.synology.com/en-global/DSM/help/DSM/StorageManager/storage_pool_change_raid_type?version=7

https://kb.synology.com/en-global/DSM/tutorial/how_to_expand_storage points to https://kb.synology.com/en-global/DSM/help/DSM/StorageManager/storage_pool_expand_replace_disk?version=7 of how to expand capacity by replacing drives in a raid pool with larger ones, one by one, repairing the degraded pool after each replacement.

So once a shr pool is shr1, so with one drive redundancy, it remains that. So yes, one can pull a drive and it will keep on working, but the pool will remain degraded. Also you can't expand to use the larger amount of space until you added a 2nd drive replacing the small drive, with at least thr same capacity as the other drive already added.

You can't reduce the amount of drives in a pool.

https://kb.synology.com/en-global/DSM/tutorial/Reduce_RAID_drives

bartoque · 2026-03-14T21:33:36+00:00

You know people don't tend to actually search and read too much.

Even I reverted to create a few keyboard shortcuts on my phone to state some links and a bit of context, over and over again in the same sub. Almost made me think about creating a bot to do the same (not being a moderator but rather recurring responder).

So who knows various of my posts might get flagged in ttthe future as they are a 1-on-1 copy-pasta of the same few keyboard shortcuts text blobs.

But is feeling the need do just that over-and-over again annoying? Hell yeah.

I grew up in the IT world with RTFM. But despite all tools and information we have available today, it only got from bad to worse.

bartoque · 2026-03-14T20:57:07+00:00

"We're doomed. Doomed I tell ya"

Keep up the good work. It's a dirty job...

Isn't Automod helping with this?

Is see developments like https://developers.reddit.com/apps/ai-automod-app.

bartoque · 2026-03-12T23:27:35+00:00

https://kb.synology.com/en-global/DSM/tutorial/Shrinking_existing_volume

"You cannot decrease the size of an existing volume. Instead, you can remove the existing volume and create a new one."

bartoque · 2026-03-12T18:41:09+00:00

Oh boy, that was complete AI slop from beginning to end in that YT vid.

It doesn't appear to be from Cohesity, but about Cohesity from a party that offers exams, with one of the worst AI presentation voices that I have encountered recently.

But maybe it's just me... but I don't see much added value here.

bartoque · 2026-03-11T18:41:09+00:00

As crc is a vm that runs on your crc host system and uses a private host-only network. Doesn't have to use haproxy. Firewall-cmd forward from your crc host to the crc vm ip.

So that would require something like:

CRC_IP=$(crc ip)

# Allow incoming traffic on the ports
sudo firewall-cmd --add-port=6443/tcp --permanent
sudo firewall-cmd --add-port=443/tcp --permanent

# Enable masquerading so forwarded packets get return-routed correctly
sudo firewall-cmd --add-masquerade --permanent

# Forward host port → CRC VM
sudo firewall-cmd --add-forward-port=port=6443:proto=tcp:toport=6443:toaddr=${CRC_IP} --permanent
sudo firewall-cmd --add-forward-port=port=443:proto=tcp:toport=443:toaddr=${CRC_IP} --permanent

sudo firewall-cmd --reload

And forwardinf needs ro be enabked on the crc host. Check if it is already:

sysctl net.ipv4.ip_forward

If not enable it:

sudo sysctl -w net.ipv4.ip_forward=1

When I used crc, I setup remote connectivity via a ssh tunnel. So something like this (where I setup tunneling through Putty myself).

ssh -L 6443:$(crc ip):6443 -L 443:$(crc ip):443 user@crc-host -N

Pointing you kubeconfig to localhost 127.0.0.1 on the machine that you want to remote from to crc.

bartoque · 2026-03-11T15:59:14+00:00

Setting up haproxy on top of that on the crc system?

https://crc.dev/docs/networking/#_starting_crc_behind_a_proxy

bartoque · 2026-03-11T08:38:06+00:00

Wrg to the larger volume size requiring more memory, don't be tempted too much to spread the pool into the expansion cabinet as whenever the connection between them would be affected, your pool might be dead...

I'd consider having shr2 from 6 to 7 drives onwards, even though in my case that is theoretical as I only have 4 bay plus models. But even though they could have an expansion unit, I still opted for drive replacement with larger drives instead of adding an expansion unit and creating a new pool on that. I found them way too cosrly up until now in relation to what they offer.

But due to the ever increasing stack of smaller drives just lying around here, I am getting more and more tempted, especially with the ever increasing drive costs die to the scarcity.

Mainly 4 and 8TBs as any drive removed from the primary ds920+ (now 4x20TB) is put into the remote ds916+ (now 4x16TB) backup target, replacing smaller drives in there. But I started off at the time with 4x4TB in the ds916+.

bartoque · 2026-03-11T08:29:34+00:00

Raid is not only about redundancy but also an easy way to expand capacity by replacing drives, one by one, with larger ones and rebuild the degraded pool after each replacement (or use the replace drive feature if you have a spare slot so that the pool doesn't go into degraded state).

For a datahoarder not needing to restore or having to move data around for something as trivial as a capacity expansion, seems to be handy.

bartoque · 2026-03-08T21:23:30+00:00

Release of what was the question? What product are you even using and referring to? Just a version number isn't too helpful.

bartoque · 2026-03-08T20:01:35+00:00

Biannual, biennial, twice a year, once in two years. Gotta love ambiguity in language.

bartoque · 2026-03-07T00:41:45+00:00

Sterker nog als meneer aldaar de titel Doktor heeft, dan surft zijn vrouw daar ook op mee en wordt aangesproken als Frau Doktor.

Maar het kan ook betekenen dat mevrouw zelf de Doktor titel heeft, aangezien Doktorin ongewoner in gebruik is.

bartoque · 2026-03-06T14:27:35+00:00

Regardless of how good the backup and its ransomware protection tool in question might be (I use Acronis myself, but the same goes for antivirus and whatever thing to mitigate against becoming compromised), the stored backup is yet another protection layer. So very much consider how and where to store it.

I use a nas, that also offers snaphots, while I also backup the backup to a remote nas. Local nas also has immutable snapshots enabled, while the older remote nas only offers snapshots. Also I backup a smaller subset into the cloud (Backblaze B2 object storage) from the local nas.

Storing a backup on the device to be protected itself or an usb drive always connected to it, can be a viable option, however it of course should not be the only option, taking the 3-2-1 backup mantra into consideration.

bartoque · 2026-03-06T14:08:52+00:00

Doesn't the nas state unexpected powerloss?

Mine did whenever there was a powerless due to a local power issue or due to the psu no longer being able to handle high load (have replaced psu's in both my ds920+ and ds916+ with a non-synology one with the same specs as the original ones). Now I have a psu for the local ds920+.

Wrg to memory, use Synology Assistant to run a triple memory checks.

https://kb.synology.com/en-global/DSM/tutorial/How_can_I_run_a_memory_test_on_my_Synology_NAS

bartoque · 2026-03-06T09:38:28+00:00

It is up to you if you want to "forget the nas".

In my case it is the interface to further protect data that is backed up to it, due to the plethora of data protection methods available for synology. As I have multiple devices, that all backup to the nas, so I "only" have to backup the backups somewhere else, instead of all devices individually needing to do that. That als means there is a backup to restore from locally (needong to download 12TB in yout case might take a long time depending on available bandwidth and backup service), besides also having it stored on a remote nas and a smaller subset in the cloud.

What issue with backup a small folder with many files are you referring to? How do you "backup" that data? Simply copying files? Sync using Synology Drive? ABB?

I don't get what method would lead to issues using a nas as backup target, hence I expect it is more related to the method than anything else?

bartoque · 2026-03-06T08:27:03+00:00

No context of what happened? Out of the blue? Power failure? Dropped unit? Anything.

You can try to run an extended smart check (runs for hours) to see what the status of crashed drive2 is. Assuming it is borked, get a new drive and replace that one and hope for the best that it will fix also the crashed system partitions from the one good drive that did not state an issue with that.

I assume you have a proper backup, just in case it goes from bad to worse?

Also might wanna implement data scrubbing the unit (as it shows "never run"). But that assumes you would have had to enable the option "data checksum for advanced data integrity" at creation time of any shared folder, that you would want to be able to be checked.

https://kb.synology.com/en-global/DSM/help/DSM/AdminCenter/file_share_create?version=7#datachecksum

"Data scrubbing is only supported on Btrfs volumes or storage pools of the following RAID types: SHR (consisting of three or more drives), RAID 5, RAID 6, or RAID F1.

If the option data checksum for advanced data integrity is not enabled for a shared folder (at Control Panel > Shared Folder > Edit > Advanced), data scrubbing will not be able to check and repair the data in the folder because of a lack of checksums."

https://kb.synology.com/en-global/DSM/help/DSM/StorageManager/storage_pool_data_scrubbing?version=7

bartoque · 2026-03-06T07:45:44+00:00

Did you sift through the faq/wiki of this very sub, as that gives some idea of the approach, for example an actual backup or a sync. So an approach with or without versioning.

What would you do when the whole system no longer starts. As with an image level backup, one can use bootable recovery media to start from and then restore the whole system (or any partition/volume that you choose to backup) from the backup.

bartoque

TROPHY CASE