5) Make sure the air ventilation in your NAS is good, HDD don't like high temps

From my NAS infor, look like seagate ironwolf run hotter than WD red.

I prefer a slower drive like 5200rpm. It runs cooler and lasts very long. Doesn't effect the NAS speed.

Mine is different, 10TB IronWolf Pro is cooler than 6TB IronWolf Pro & 4TB WD Red

Got some toshi n300 6tb’s
What a diff vs wd red 4tb’s

Temps after a copy that lasted 8 hours
The n300 temps was just 4c more. 41 vs 45c

The big difference was plex. The issue wasnt on my comp or laptop. It was on my iphone. Scrapping, and sometimes buffering issue on wifi 5ghz. I always thought issue on phone low power mode or wifi having interference or cell tower issue

With the N300 zero issue even on 4k. Guessing the 7200rpm 256mb cache.

Phone was iphone 7plus and 11pro.

have you unable in the NAS setting for video or media streaming thing? max the stream ouput.

Also check your NAS network telco for upload speed.

Sometime I have to lower down the phone stream quality and not set to auto.

So far I don't have the problem with WD red beside aging bad sector.

If you using DS218+, check the memory usage. You might need to increase the ram size.

When you write to a CMR disk, it just writes to sectors. Some drives will try to optimise the order the sectors are written in, but they all write data to the exact sector you tell them to write it to.

When you write to a SMR disk it’s a bit like writing to SSD – no matter what sector you might THINK you’re writing to, the drive writes the data where it wants to, then makes an index pointing to it (indirect tables).

Essentially, unlike conventional drives, a SMR drive puts a lot of logic and distance between the interface and the actual platter. It’s far more like a SSD in many ways (only much much slower).

SMR disks have multiple levels of caching – DRAM, then some CMR zones and finally shingled zones

In general, writes are to the CMR space and when the disk is idle the drive will rearrange itself in the background – tossing the CMR data onto shingled areas – there might be 10-200 shingled “zones”. They’re all “open”(appendable) like SSD blocks are. If a sector within a zone needs changing, the entire zone must be rewritten (in the same way as SSD blocks) and zones can be marked discarded (trimmed) in the same way SSD blocks are.

When the CMR zone fills the drive may (or may not) start appending to a SMR zone – and in doing so it slows down dramatically.

If the drive stops to flush out the CMR zone, then the OS is going to see an almighty pause (ZFS reports dozens of delays exceeding 60 seconds – the limit it measures for – and I measured one pause at 3 minutes). This alone is going to upset a lot of RAID controllers/software. [A] WD40EFAX drive which I zero-filled averaged 40MB/sec end to end but started at 120MB/sec. (I didn’t watch the entire fill so I don’t know if it slowed down or paused).

HDD manufacturers have been using SMR HDD instead of CMR. Toshiba using on their desktop HDD, Seagate on their desktop Barracuda HDD. WD using it on their Red HDD
https://blocksandfiles.com/2020/04/15/shing...caching-writes/

https://blocksandfiles.com/2020/04/14/wd-re...etic-recording/

https://blocksandfiles.com/2020/04/16/toshi...etic-recording/

https://blocksandfiles.com/2020/04/15/seaga...esktop-hdd-smr/

Yup, included shipping still cheaper than here.

2pcs save me RM500+. 

Not sure got intl warranty. If spoil will try RMA to seagate.

You bought it from Amazon? Have you tried to buy from Newegg?

question

can DS218+ handle 800mbps download

afaik 2 cores will struggle up to 400-500mbps on laptops

Got some toshi n300 6tb’s
What a diff vs wd red 4tb’s

Temps after a copy that lasted 8 hours
The n300 temps was just 4c more. 41 vs 45c

The big difference was plex. The issue wasnt on my comp or laptop. It was on my iphone. Scrapping, and sometimes buffering issue on wifi 5ghz. I always thought issue on phone low power mode or wifi having interference or cell tower issue

With the N300 zero issue even on 4k. Guessing the 7200rpm 256mb cache.

Phone was iphone 7plus and 11pro.

The DS218+ supports on-the-fly hardware transcoding, supposedly all the way to 4K video. It does this using its own Video Station and DS File apps. If you prefer to use Plex, you will not have access to the hardware transcoding features, since Plex’s transcoding is CPU-bound and NAS devices in this price range just don’t have the horsepower to do that. With Synology’s apps, we were able to play several 1080p MKV files on various devices over 802.11ac Wi-Fi without issue, but when we tried the same with three different 4K movie trailers, they were all unwatchable due to stuttering. We also had issues with any 4K video using the DTS audio codec, in which no sound would play. Some formats, such as M4V, wouldn’t play at all. Files that didn’t require any transcoding, like MP4 files, played flawlessly on all devices. On-the-fly transcoding is dependent on the file format, the various codecs, and the device you’re watching the transcoding file on, so your mileage will vary here.

Still, even though Synology advertises the DS218+ as being capable of all kinds of transcoding, you’ll want to use a more powerful computer than the DS218+ (or any other NAS in this price range) if you’re serious about on-the-fly media transcoding. We recommend transcoding your video files ahead of time if you plan on using your NAS as a media server. You can do this with the Offline Transcoding feature in Video Station, though unfortunately you need to manually choose individual videos to convert.

is there a compiled list of all the known SMR drives?

This case just uncover, maybe later on there will be list of SMR drives that they found.
So far I found this one https://www.ixsystems.com/community/threads...r-drives.83993/

no transcoding.

the question is that 2 core able to handle 800mbps download.

How to tell and how to test the speed of 800mbps download?

no transcoding.

the question is that 2 core able to handle 800mbps download.

just transfer a file via network
or download a file from google drive..

Try with google drive, but it seems can't download to the NAS. Paste the URL into the download station. But no content in the download. or error.

Try with another cloud station also same.

But my broadband speed is only 100Mbps.

I think there's some ways that Google block download from using download manager. You can try with any internet browser that the NAS have.
Also can can try with any site that have direct download without captcha or security, paste the link to download station.