Storing 18TB (let alone with raid) on SSDs is something only those earning Silicon Valley tech wages can afford.
In essence, what we together are saying is that people with super-sensitive sleep that are also easily upset, and that don't have ultra-high salaries, cannot really afford 18 TB of data (even though they can afford an HDD), and that's true.
And you should use some form of redundancy/backups anyway. It's also a good idea to not use all disks from the same batch to avoid correlated failures.
1: https://datablocks.dev/blogs/news/white-label-vs-recertified...
Quote from Toshiba's paper on this. [1]
Hard disk drives for enterprise server and storage usage (Enterprise Performance and Enterprise Capacity Drives) have MTTF of up to 2 million hours, at 5 years warranty, 24/7 operation. Operational temperature range is limited, as the temperature in datacenters is carefully controlled. These drives are rated for a workload of 550TB/year, which translates into a continuous data transfer rate of 17.5 Mbyte/s[3]. In contrast, desktop HDDs are designed for lower workloads and are not rated or qualified for 24/7 continuous operation.
From Synology
With support for 550 TB/year workloads1 and rated for a 2.5 million hours mean time to failure (MTTF), HAS5300 SAS drives are built to deliver consistent and class-leading performance in the most intense environments. Persistent write cache technology further helps ensure data integrity for your mission-critical applications.
[1] https://toshiba.semicon-storage.com/content/dam/toshiba-ss-v...
[2] https://www.synology.com/en-us/company/news/article/HAS5300/...
Max operating range is ~60C for spinning disks and ~70C for SSD. Optimal is <40-45C. The larger agents facilties afaik tend to run as hot as they can.
But even the cheapest high capacity SSD deals are still a lot more expensive than hard drive array.
I’ll continue replacing failing hard drives for a few more years. For me that has meant zero replacements over a decade, though I planned for a 5% annual failure rate and have a spare drive in the case ready to go. I could replace a failed drive from the array in the time takes to shut down, swap a cable to the spare drive, and boot up again.
SSDs also need to be examined for power loss protection. The results with consumer drives are mixed and it’s hard to find good info about how common drives behave. Getting enterprise grade drives with guaranteed PLP from large on-onboard capacitors is ideal, but those are expensive. Spinning hard drives have the benefit of using their rotational inertia to power the drive long enough to finish outstanding writes.
Not to say you shouldn't backup your data, but personally I wouldn't be to affected if one of my personal drives errored out, especially if they contained unused personal files from 10+ years ago (legal/tax/financials are another matter).
Mainly I don't want to lose anything that took work to make or get. Personal photos, videos, source code, documents, and correspondence are the highest priority.
Software solutions like Windows Storage Spaces, ZFS, XFS, unRAID, etc. etc are "just better" than traditional RAID.
Yes, focus on 2x parity drive solutions, such as ZFS's "raidz2", or other such "equivalent to RAID6" systems. But just focus on software solutions that more easily allow you to move hard drives around without tying them to motherboard-slots or other such hardware issues.
I like btrfs for this purpose since it's extremely easy to setup over cli, but any of the other options mentioned will work.
RAID0/1/10 has been stable for a while.
RAID does not mean or imply hardware RAID controllers, which you seem to incorrectly assume.
Software RAID is still 100% RAID.
Here's a Wayback Machine copy of the page when that does happen: https://web.archive.org/web/20251006052340/https://ounapuu.e...
The author is using a ThinkPad T430.
Any experiences?
However, there are disconnects/reconnects every now and then. If you use a standard raid over these usb drives, almost every disconnect/reconnect will trigger a rebuild — and rebuilds take many hours. If you are unlucky enough to have multiple disconnects during a rebuild, you are in trouble.
Personally I’m in the process of building a NAS with an old 9th gen Intel i5. Many mobos support 6 SATA ports and three mirrored 20 TB pairs is enough storage for me. I’m guessing it’ll be a bit more power hungry than a ugreen/synology/etc appliance but there will also be plenty of headroom for running other services.
[1] https://www.truenas.com/docs/core/13.0/gettingstarted/coreha...
I hate blanket recommendations like this by docs. To me, it just sounds like some guy had a problem a few times and now it's canon. It's like saying "avoid Seagate because their 3tb drives sucked." Well they did, but now they seem to be fine.
If you're occasionally copying data to an external USB drive, that's totally fine. That's what they were designed for.
The issue is that they were not designed for continuous use, or much more demanding applications like rebuilding/resilvering a drive. It's during these applications that issues occur, which is a double whammy, because it can cause permanent data loss if your USB drive fails during a recovery operation. I did a little more research after posting my last comment and came across this helpful post on the TrueNAS forums going into more depth: https://forums.truenas.com/t/why-you-should-avoid-usb-attach...
The UNAS Pro 8 just came out and I'm thinking about getting it, switching away from my aging Synology setup ... only thing I wish it had was a UPS server as my Synology currently serves that purpose to trigger other machines to shut down ...
If you want redundancy, look at something like SnapRAID, http://www.snapraid.it
If you want to combine into a single volume, consider rclone. These remotes specifically are the ones I'm thinking could be useful,
Good luck o7
They all had onboard gige so it worked fine - native vlan for the inbound Comcast connection, tagged vlans out to a switch for the various LAN connections.
They were from the era of DVD drives so I was able to put an extra HDD in the DVD slot to expand storage with. One model even had a eSATA port.
They worked great. Built-in UPS and they come with a reliable crash cart built-in!
White labeling avoids lawsuits.
I'm always interested in these DIY NAS builds, but they also feel just an order of magnitude too small to me. How do you store ~100 TB of content with room to grow without a wide NAS? Archiving rarely used stuff out to individual pairs of disks could work, as could running some kind of cluster FS on cheap nodes (tinyminimicro, raspberry pi, framework laptop, etc) with 2 or 4x disks each off USB controllers. So far none of this seems to solve the problem that is solved quite elegantly by the 1U enterprise box... if only you don't look at the power bill.
"Old server hardware" for $300 is a bit of a variation, in that you're just buying something from 5 years ago so that its cheaper. But if you want to improve power-efficiency, buy a CPU from today rather than an old one.
--------
IIRC, the "5 year old used market" for servers is particularly good because many datacenters and companies opt for a ~5-year upgrade cycle. That means 5-year-old equipment is always being sold off at incredible rates.
Any 5-year-old server will obviously have all the features you need for a NAS (likely excellent connectivity, expandibility, BMS, physical space, etc. etc.). Just you have to put up with power-efficiency specs of 5 years ago.
Personally, I just don't have that much data, 24TB mirrored for important data is probably enough, and I have my old mirror set avaialable for media like recorded tv and maybe dvds and blu-rays if I can figure out a way to play them that I like better than just putting the discs in the machine.
econ•4h ago
> Half of tech YouTube has been sponsored by companies like...
It just struck me that the product reviews are a part of the social realm that is barely explored.
Imagine a video website like TikTok or YouTube etc where all videos are organized under products. Priority to those who purchased the product and a category ranked by how many similar products you've purchased.
The thing sort of exists currently in some hard to find corner of TEMU etc but there are no channels or playlists.
Aurornis•3h ago
Viewers want to see opinions from specific people they’ve come to trust, not the first video that comes up for a product.
aspenmayer•3h ago
markerz•2h ago
econ•2h ago
I just purchased a bicycle chain cleaning device. It was absurdly cheap. The plastic was extruded poorly, it was hard to assemble, it was not entirely obvious how to use it. However! It did the job and it barely got dirty. I expected it to be full of rusty oil both inside and outside but it accumulated just a tiny smudge on the inlet. If anyone made a video it would be a fantastic product.
noAnswer•21m ago
2. The world is filled to the brim with videos about "fantastic products".
9dev•29m ago
In comparison, I’d rather read a general review magazine with a long history. At least they don’t try to trick me into believing they are working out of the goodness of their hearts, and they usually aren’t married to a single big sponsor.
Online reviews are broken beyond repair.
numpad0•1h ago
1: https://review.kakaku.com/review/K0001682323/ | https://review-kakaku-com.translate.goog/review/K0001682323/...