Dope Tech Episode 2

<<@Romeo-sf7tw says : Legend 👏🏾>> <<@eaqie says : I think you should make a video on these kind of DAS enclosures: ACASIS 2-Bay RAID 2.5" External HDD Enclosure. This specific one is from AliExpress for €23 and fits two 2,5" SSD's or HDD's. It suits in well with the other information your channel covers. You can test the different RAID modes, run speed tests, compare enclosures etc. There is also NVMe enclosures available.>> <<@bradbeasley7669 says : 👍>> <<@herbsimpson942 says : Most excellent! Looking forward to more of your extremely well-done videos!>> <<@twistedwhiskers8776 says : 8:00 I hope this doesn’t happen with TLC and definitely not with qlc without significantly increasing PE cycles for them>> <<@70ixlr86 says : MLC is 3x more costly now. Rarity sadly. Glad to have several drives considering.>> <<@gustavoantero370 says : this is great.>> <<@hreap7854 says : a good chunk of this info pertaining to the SLC cache isn’t even featured for most ssds in the manufactuer’s site how is fhis even legal>> <<@Naveen-t says : Good information>> <<@yigajonathan4744 says : Please Mr Christopher, would you please make a video explaining in great detail What RAID is, explaining all the RAID arrays.😊>> <<@iskandartaib says : I recently bought several SSDs so I was trying to figure out what used TLC and what used QLC. Fairly obvious with Samsung, but Samsungs are fairly expensive and I was looking at the cheaper 2 1/2" SATA drives since these were to be used in old PCs without nvme slots. Pretty much all drives in this class seem to use TLC, some advertise having SLC caches, and so far I've only found one QLC drive (which required reading of the fine print). This was the Fikwot FX815, which strangely enough, usually sold for more than Fikwot's TLC offerings. All of these drives operated at the same speed (being interface-limited). One thing I wonder about - are TLC and QLC being used in USB sticks and SD and micro-SD cards? Perhaps ultra-cheap USB sticks now use QLC (the non-fraudulent ones, that is). Note that they're selling "high endurance" micro-SD cards for use in dashcams, this implies writing and erasing large amounts of data on a daily basis, so perhaps they can't be using QLC in this application. One wonders if these high endurance cards would be the best to use if you are using the micro-SD card as a boot disk for a SBC.>> <<@goshicrazy says : another absolutely top notch video thank you!>> <<@merannoprincipe says : Happy to see your channel has grown! I view you as my Computer Engineering professor! Love your contents!>> <<@adrianstephens56 says : Thank you for making this, Mr Barnatt. I've started to watch this, and thought I'd relate my experience. I'll come back and edit this when I've finished the video. I use ZFS in my linux desktop (Kubuntu). I needed to increase my storage over the 1TB WD Blacks I was using, and I was attracted by the price of a well known brand 4TB nvme - let's call it brand X. I measured sustained raw throughput of 1.4 GB/s write and 1.6 GB/s read over 100G. What's not to like? I benchmarked a brand X zfs dataset, no mirror, compression or dedup. Sequential read performance is 3GB/s (5x8GB test, so some RAM caching is probably increasing this figure), but write performance was terrible at about 130 MB/s. A WD Black 1TB nvme gave 2.4 GB/s read and 1.5 GB/s write - more than 10x faster writes. When I added brand X devices to a ZFS mirror, sequential write throughput was about 60MB/s, and random 4K writes went down to 11MB/s. This is woeful, and certainly not usable. If I create a mirror of a brand X and a WD Blank nvme and do a performance test and observe the io delay times using atop, I saw delays at the brand X device of 10ms per io and tens of microseconds at the WD Black. The moral I learned from this story is that not all well-known brand's nvme devices (at similar prices - about £300 at the time) perform the same in practice. This is not necessarily an endorsement of WD Black nvme's, just the ones I bought and had no issue with. I've also some WD Red nvmes and WD Red 8TB spinning rust in my server, with no failures over 5 years.>> <<@leosmith848 says : Excellent. There is one parameter you missed here: Power consumption. When researching drives for a Raspberry PI project where total USB supply current to the drives is limited, I found older slower SATA SSDs used a lot less power. An omission.. not an error!>> <<@slukant says : When I saw how this man looks I somehow knew it's gonna be worth the time :) . Great explanation, and thank vou!>> <<@bryanlee6311 says : Thank you. The visualization helped a lot to understand how SLC cache operates, a topic that I've never quite understood.>> <<@iulianrotariu2191 says : Hello, is it good to partition an SSD Capacity: 500 GB?>> <<@GhostwarGWPTC says : very helpful! summarized, to the point, and well explained>> <<@eldmaster says : Thank you for sharing. Well explained 10/10>> <<@athulprakash4447 says : Wear-leveling seems so counter-intuitive: doesn't moving data around within the SSD lead to extra P/E cycles anyway? There shouldn't be an advantage there like Chris explained. Someone help me out?>> <<@george-fulger says : @explainingcomputers , does windows has sustained writing requirements? because to me is does seems so, when booting....>> <<@05mryoyo says : Does that mean if for example a 2TB NVME is full at 70% or more, it's SLC is most likele very low, which leads to much lower write speeds ?>> <<@abunk17 says : Had a laugh the other night as I remembered 5:31 after scratching my head for a few hours as to why one of my SATA SSDs (Crucial BX500 1TB) was weirdly slow at around 94MB/s read and 15MB/s write then realizing I overfilled the drive. I had to reconnected the SATA cable first to resolve the SSD showing up as SATA 3Gbps instead of 6Gbps. But the SSD was still slow so I ended up changing SATA cables and redoing my PC's cable management while I was at it. The slow performance still stuck so I checked how filled the SSD is as I remembered that being a potential cause since you mentioned not using up more than 90% of the SSD for wear leveling. Well it was about 84% used up, so I went past my normal practice of using less than 80% so performance doesn't slow down too much (a recurring issue I faced with a 128gb SSD in the past). After moving and deleting a bunch of files and it was back to the normal 450MB/s read and 530MB/s write. Its interesting how hard drives can mostly keep the same drive performance (assuming its not too old or too fragmented) as it nears full capacity compared to SSDs where filling the drive too much can slow it down. Its a tradeoff that's I can live with since generally even a DRAM-less SATA SSD is more responsive than a hard drive.>> <<@potem1 says : Most of my computers are over 15 years old, yet, I have not had any significant problems with any, or most of them. Most are HP elitebook computers/laptops and they came with HDDs! To save a lot of money, I have 0 interest in buying any new expensive computers in the foreseeable future! I put an SSD into my desktop, and I am very pleased with its performance! In my mind, it may be one of the best things one can do to "revive" any good working older computer! I recently purchased 3 cheap SSDs.......the used Intel SSD I put in my desktop (thru cloning) only cost $16.00! Mr. Barnatt, in my opinion, is a true GOAT of this technology, and his vital info permitted me to buy the perfect SSD for my specific needs!! I am sold and 100% subscribed to his videos and ideas on this important subject!! I believe most people will enjoy watching his videos!! Thank you!!>> <<@KarlEdwards-i1g says : i have only one samung nvme ssd 980 1tb v-nand. used to boot up to win 10 in a few seconds, now can take upto 2 mins. when i click on disk management, disk 0 has recently appeared and says must initialize disk, when i click on gpt or mbr option and click ok it says "A DECIVE WHICH DOES NOT EXIST WAS SPECIFIED". disk 1 is healthy in all parts any ideas, is my drive failing now.>> <<@sebbyteh9203 says : 7:32 it's called marketing and abstraction, most manufacturers use this to make their product to be judged with only one number, just look at Nvidia and Amd>> <<@AttilaM-p6x says : Is it possible to manually dedicate SLC cache to specific programs?>> <<@AttilaM-p6x says : 7:37 In this case, I think this is great. "Multi" just means "more than one," but not necessarily "exactly two." The original naming is bad: it should've been DLC, so "Dual Level Cell," because triple, quadruple, and all other future LCs can be rightfully called multi leveled. "3-bit MLC" might confuse someone who's used to equating MLC with 2-bit, but it's likely that more people mix up TLC and QLC than those that know what they mean. So this is better for most users. That said, I'm not familiar with any of the other Samsung-esque deviations from industry standard naming conventions, so I can't speak to those, but this one makes sense to me.>> <<@WanderfalkeAT says : Lexar for the past few years made some excellent DRAM less SSD's! Having lot's of RAM helps to also negate their drive's missing DRAM. 7200MB/s sustained read and about 3400MB Write using the Mobo's RAM is absolutely a good way to keep it cheap these days. A 4 TB NVME PCIE 4.0 drive for about 270$ is a good choice nowadays compaired to a 250$ 2TB Samsung 990Pro. Except you still run around with 16GB of RAM! I have both the 4TB Lexar and the 2TB Samsung and they read/write to each other with about 3-5GB/s in both directions which is a good thing and shows that the cheaper solution is not a negative for me. My next drive will be a Lexar again.>> <<@JohnGlen502 says : If you don't need a Maserati get a mini van with a turbo. If you need external storage buy an External Enclosure Case for $4 and throw in your old hard drive. Should be good for 5 years - I've heard! Beware of data rot.>> <<@Aureon_Music says : Great content! Can you please make a video on ssd caching for beginners?>> <<@orangemash says : Great explanation. Ta>> <<@Ludgar6-1-9 says : Thank you>> <<@smarteveryday1606 says : nice, to the point very precise and clear. thanks>> <<@perikliskagialaris1445 says : According to the reviews I have read Dramless SSD is a bad idea especially for boot, OS drives and for heavy copy-write workloads. On the other hand Dramless NVMEs have not so visible and noticeable consistency or life expectancy issues due to the use of system RAM. The downside of Dramless NVMEs seems to be the consistency of performance for heavy use and the integrity of the data in case of a power failure (if there is no UPS). I ve read that DRAM SSDs and NVMEs have some kinds of protection circuits that help the data integrity in case of power failure. Is it still true or an urban myth?>> <<@vinnyfran786 says : Great information on subjects I am interested in upgrading my PC. Definitely worth a sub.>> <<@ChristyZachary says : 7530 Von Route>> <<@mancave-simpilot says : Well done. Even as someone with 30+ years in IT and therefore tech savvy, albeit rusty as hell for the past few years, this instructional video was easy to absorb and my knowledge for purchasing SSD's is now complete within 15 minutes. Good stuff and you got a subscriber.>> <<@nicktayloriv310 says : The Crucial P3's (1TB for OS, 2TB for Cache/Project) say's they dont have DRAM cache on them to "keep costs down with very little compromise to overall speed". Their words. 🤷🏽‍♂>> <<@hianxi8y says : 5:50 roughly 1 TB per 3 GB>> <<@Adreno23421 says : One can also buy an enterprise SSD, that will sustain the write speed throughout the whole drive. Also, many of them have a lot more DRAM, like 4gb, absorbing quite quickly more of the OS random write operations (that tend to make a system feel slow if not enough cache is available).>> <<@mechaform says : Whenever I have a computer question, I know I will find an answer here.>> <<@cookie1138 says : Thank you for explaining all of this :)>> <<@benyomovod6904 says : I am a Samsung fan, they never failed me>> <<@benamigal says : Thanks for a very informative and precise video! I've got an external ssd as a media server . Is there a life expectancy figure for reading cycles? Another maybe stupid question my ssd sometimes seating in a drawer for weeks. So it can't preform wear leveling but it also not in use. Is there any effect to a seating data? Besides the material degrading>> <<@eriklamelakillingspree7690 says : Can you explain further how HMB would have a negative impact on gaming performance?>> <<@johneygd says : I tout that ssd drives became the holy grail solution for reliability,speed and life span over harddisk drives,by since i know that also ssd drives do rely on power in some form or another to maintain it’s data,i have changed my mind about ssd drives,why couldn’t they just invest ssd drives or flash cards wich will work the same way as rom chips in wich the data has to be burned in wich can be only erased with a laser if it is not protected,so why not relying on those rom chips instead for preserving data forever,damnit what a letdown about the vulnerbility of ssd drives🥲🥲>> <<@SALVVTORE says : Great video thank you very much>> <<@RichardBejtlich says : Superb video. Is there any way to check how well used a SSD has become?>>