Largest Seagate External Hard Drive

[Ceola Roefaro]

Seagatehas officially launched the first ever 30TB hard disk drive - the Exos X Mozaic 3+ - and the largest yet and the good news is, despite the fact that it will initially be targeting hyperscalers and enterprise markets, the drive will be sold to end users and will be readable without specialist hardware.

Ten 3TB platters were used, sporting actual areal density of 1.742 Tb per square inch. There are plans to have higher capacities model either using HAMR (Heat Assisted Magnetic Recording) by itself or SMR (Shingled Magnetic Recording) with HAMR for hyperscale customers keen to get the best value for money, albeit with caveats. SMR + HAMR may not be readable on consumer-grade hardware.

Seagate confirmed that the drive will have a cheaper cost per terabyte compared to existing models. BS Tech explained that the new drives are based on existing technologies used by Seagate - which would include the chassis, the motors and most of the electronics - which means that the cost of development is much smaller than for a brand new line of products.

30TB drives have been in the pipeline for a while: Seagate had an announcement two years ago and confirmed select customers were testing the drive. Toshiba, another HDD vendor, confirmed it was working on drives of similar capacity. Other capacities that have been confirmed, after Seagate unveiled an Exos 24TB drive, include 32TB and 36TB hard disk drives

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New cord cutter here. Received my Tablo Quad a couple weeks ago and am loving it! Running 3+ TVs and computers in the house over Google Wifi and the picture quality is better than cable (even on my 100" projector in the basement). Very pleased! So now I need to get an external hard drive. I know Tablo recommends Western Digital Elements and Seagate Expansion. Costco has a 5TB Seagate One Touch for a good price, but not sure if it will work. Interested to see what the community is using and what is working well. Thanks!

My 6 TB Seagate Skyhawk surveillance drive is the best that I have used with a Tablo over my seven year history. My Quad really gets a workout every day. The mesh enclosure and the drive have been an excellent storage system. Here is a link to my post about it from Feb 2020 : -hard-drive-are-you-using/25606/10/

I know from reading other articles in other places that a particular system can only access a certain amount of disk storage based on things like the way the firmware is written, the amount of memory installed, etc. etc. etc.

I had a Gen-1 HP Media Vault NAS device that would support a maximum of 1.2T of drive space as a combined total of the internal drive as shipped, any drive installed in the internal expansion bay, and anything connected via the USB connector. This was explained as a limitation of the device itself due to, (I believe), internal memory constraints.

The 6TB version already clearly supports GPT partitioning, which has a maximum partition size limit of 6.4ZiB (Zebibytes) on disks with 512 byte sectors. This is much larger than the current hardware tech bottleneck, which is 48bit LBA-- It has a max addressable block limit that will limit 512byte sector based devices to 128PiB (pebibyte)

The single bay MyClouds are not really meant to be taken apart, which is the only way to switch out the drive inside (a not straight forward process), which means you are limited to the size of disk WD ships inside unless you feel like voiding the warranty. However, the max size of the external USB disk is controlled by the above information.

It sounds like what you are REALLY asking, is what is the maximum RECOMMENDED size. We can derive that based on the amount of system ram installed in the system, against the max recommended sizes of other offers. It looks like WD is subtly suggesting that one have at least 125mb of ram for each GB of storage, if you work out the numbers given on their product comparison chart.

=11425

jharris1993: The issue with XP wrapping its filesystem was due to LBA. When it shipped, XP only supported 28bit LBA. There were disks that needed 48bit LBA to address the full drive. The lba register would overflow in the windows driver when trying to access these disks, unless you set a registry hack, and installed an updated atapi.sys. (Needs SP1 installed) In addition, there is a limit imposed by the old partition scheme, MBR-- which could only use 32bit LBAs. This limits the size of a disk to 2TB. (or 137GB, with the atapi issue.)

The Mycloud NAS uses linux internally. (Gen2 is still technically linux, even though it is a weaksauce busybox shrinkwrap embedded version) Linux knows all about GPT, the new partitioning schema, and has known about 48bit LBA for over a decade. There is not a reasonable technological reason why the Mycloud would be unable to see even a truly enormous sata disk attached to it.

The rapidly expanding size of both hard drives themselves, as well as the corresponding enclosure capacities and stand-alone device sizes, makes it easy to rapidly and (somewhat), inexpensively add huge volumes of storage.

Ergo, I strongly suspect that there is an upper limit out there somewhere, just waiting for some ignorant fool to mess with it. Since it is very unlikey that the My Cloud can support devices in the Exabyte range, we should know what the limit is.

I would tend to agree that thinking you can attach any arbitrarily huge drive to the system and have it work flawlessly is a pipedream, especially with these single bay consumer grade NAS appliances. They ONLY have 512mb of ram in them, for the gen2! (Gen1 has 256mb!!) If you have lots of users hammering the device, the system is going to run out of ram to use as FS cache very quickly, and will start having cache misses, which will then degrade its performance. The same may be true of write caching, or for having sufficient buffers for incomming connection requests.

For single nerdy losers like myself, the single bay offering is cheap and effective, but you need to know what you are buying, and why you are buying it. In my not so humble opinion, the single bay MyCloud does not belong in small to midsize businesses-- at all.

[. . . .] you really should be considering one of the multibay offerings that have upgradable RAM and other nice perks. For single nerdy losers like myself, the single bay offering is cheap and effective, but you need to know what you are buying, and why you are buying it.

You are not understanding me. In order for it to address a 6tb drive, it MUST implement ALL 36 bits, or it will not be able to see the full drive. 6tb is not the largest number that needs 36bits. That is the 64tb value I quoted. Greater than that, it will require more active bits, which we do not KNOW are available. (We KNOW there are at least 36bits of active address, because the 6tb drive works.)

Pages for logged out editors learn more Advanced Format (AF) is any disk sector format used to store data on magnetic disks in hard disk drives (HDDs) that exceeds 512, 520, or 528 bytes per sector, such as the 4096, 4112, 4160, and 4224-byte (4 KB) sectors of an Advanced Format Drive (AFD). Larger sectors enable the integration of stronger error correction algorithms to maintain data integrity at higher storage densities. The use of long data sectors was suggested in 1998 in a technic...

I have not interrogated my system to see if it contains an advanced sector format drive, or a traditional sector format drive. Most (but not all!!) advanced sector format drives will (attempt!) to run with 512 byte virtual lba, if the controller does not support 4k block addressing. However, this is an embedded device. We cannot presume it knows what 4k sectors are, unless we observe it using one in the wild. (and vise versa!!)

Looks like the device knows about 4k physical sectors, and works with virtual/logical 512byte sector simulation. Until somebody tries a 4k native drive in one, the 4k native format disk support is unknown.

Hello, everyone.

I have a Samsung Smart TV, the model is UE32M5505A. I want to connect this TV to an external hard drive, not to record, but to play videos. The hard drives recommended by Samsung (I have already contacted them about this issue) are those which have a maximum of 2TB capacity and which have their own power adapter. The problem is that there are no external hard drives in the market with this requirements, because all those which have 2TB or less do not have a power adapter, and those which do have, are all above 2TB of capacity. Samsung could not help with this issue when I contacted them because of this paradox.

So, is there anyone here with the same problem? And is there anyone with suggestions or solutions to this issue?

Thank you.

You should be fine using the HDD 2 amp socket on the TV that is marked for Hard drives. I'd recommend building your own using a 2.5" drive ([perhaps a 2.5" 2TB Seagate Baracuda) and something like the ORICO 2.5 Inch Aluminium USB 3.0 External Hard Drive Enclosure Case (search Amazon), this is working faultlessly from the USB socket on my Samsung TV and draws nowhere near 2 amps and is quiet and plenty fast enough for video.

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