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Samsung ships the world's highest capacity SSD, with 15TB of storage

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Re: Samsung ships the world's highest capacity SSD, with 15TB of storage

#141

Post by beagle3 »

antongribok wrote: post #52
NovaS1X wrote: post #2

Impressive. First question that pops into mind is how long the rebuild time would take if one of these failed in a RAID. I can imagine it'll take a while.

If you use a fully distributed storage system, like Ceph (or 3Par?), then rebuild times during a drive failure would be significantly lower. Also, any self-respecting storage system (RAID or not) will lower rebuild priority over normal IO. To give a specific example, let's say you have a 10-node Ceph cluster with 10 of these SSDs in each node filled up to 75% capacity. During a rebuild you throttle down to 50 MBps pe…

Isn't 50MBps closer to 0.5Gbps than 5Gbps? Where does the other factor of ten come from?

Re: Samsung ships the world's highest capacity SSD, with 15TB of storage

#142

Post by justincormack »

BillyParadise wrote: post #107
justincormack wrote: post #99

Earlier quoted context omitted.

But in five years the cost of fulfilling it is low given falling prices.

and that's how companies can afford to offer guarantees.

Outside tech/Moore's Law type companies they offer guarantees by making the products actually durable. A very different model.

Re: Samsung ships the world's highest capacity SSD, with 15TB of storage

#143

Post by xbmcuser »

Razengan wrote: post #103
adevine wrote: post #31

Earlier quoted context omitted.

But biological storage also doesn't have the random access characteristics and read/write speeds of this storage.

Does it need them? My memory seems to hold a lot of things, and the ability to look them up instantly (not counting the decompression delay AKA tip-of-the-tongue syndrome where you know you know something but can't recall it until it suddenly comes to you.)

Your memory is not accurate as you think it is. Your processor fills out the missing pieces so you think you remember it accurately.

Re: Samsung ships the world's highest capacity SSD, with 15TB of storage

#144

Post by ryao »

scurvy wrote: post #129
ryao wrote: post #81

Earlier quoted context omitted.

NVMe likely cannot scale to thousands of attached drives simultaneously due to limitations of PCI-E while SAS can. Scaling to thousands of attached disks was the motivation for QEMU's virtio-scsi because virtio-blk's 1 block device per PCI-E device meant that virtual machines using virtio-bulk could not scale past 32 drives. nVMe's 1 drive per PCI l-E device model should suffer from the same limitation. Similarly, SA…

NVMe doesn't require a PCIe slot. It just requires some lanes. You can use the 2.5" form factor with the same performance. It works really well. NVMe scales just fine. As for the livelihood of those selling these storage appliances, well check out NetApp stock price lately. Also,I wouldn't want to run thousands of these SAS drives in today's storage appliances. Even with high performance, the control plane and rebuil…

People are building ZFS systems with thousands of drives.

As for being different than virtio because it needs PCI-E lanes, what keeps QEMU from emulating however many are needed?

Re: Samsung ships the world's highest capacity SSD, with 15TB of storage

#145

Post by antocv »

BillyParadise wrote: post #106
antocv wrote: post #101

Earlier quoted context omitted.

Its the same company. They marketed it as warranty so and so, speed such and such, and in fact its a piece of shit, and Samsung does not stand by its own product. Even their newest Samsung EVO 850 is marketed as write speed ~500mb/s, but that is only true for the first 3gb, due to their usage of "TurboWriteCache", which means it has some kind of DRAM or faster real flash disk, and the rest of the disk is below 100mb/…

So you wouldn't use a high end Cisco router because they make the crappy "cisco small business" line?

No I would not. Whats to weird about that?

Juniper is nice, ExtremeNetworks, Pluribus etc, its not like I have to eat shit from a supplier just because they have labeled it "low end", "customer" grade and so on.

Re: Samsung ships the world's highest capacity SSD, with 15TB of storage

#146

Post by antocv »

reitzensteinm wrote: post #111
antocv wrote: post #101

Earlier quoted context omitted.

Its the same company. They marketed it as warranty so and so, speed such and such, and in fact its a piece of shit, and Samsung does not stand by its own product. Even their newest Samsung EVO 850 is marketed as write speed ~500mb/s, but that is only true for the first 3gb, due to their usage of "TurboWriteCache", which means it has some kind of DRAM or faster real flash disk, and the rest of the disk is below 100mb/…

It's only good for 3gb bursts . Which is a ton of data to write to a consumer drive at one time. It's also 6gb/12gb for 500gb/1tb drives. It's a perfectly fine tradeoff for a consumer drive. Just because it doesn't fit your use case doesn't make it junk.

What you define as ton of data for a consumer drive is your opinion only, there are many customers who do video editing work and really want/need the disks they buy to fulfill their stated technical specifications of write speed.

Samsung witheld/lied about the write speed, and only mentioned TurboWriteCache in hard-to-find support forums, because they know it matters for a meaningfully large segment of the market.

Its easy to state "about 250mb/s write speed, up to 500mb/s burst write speed" in marketing materials, if it didnt impact the sales as you state for consumers, why wouldnt they?

Re: Samsung ships the world's highest capacity SSD, with 15TB of storage

#147

Post by phaemon »

SixSigma wrote: post #134
phaemon wrote: post #133

Earlier quoted context omitted.

A warranty is a guarantee. I used the word "guarantee" as well. It's the right word to use. Seriously, what do you think a guarantee is?

We guarantee these O-Rings will not rupture. If these O-Rings rupture, we will replace them under warranty.

> We guarantee these O-Rings will not rupture.

Ah, so you're thinking of a guarantee like a politician would use the word. "I personally guarantee that..."

Every time I hear them say that on TV I'm thinking, "Really? So, what are you going to give me if it doesn't work out? What's that? Nothing?! Then it's not a guarantee is it! You might as well have said you pinky-promise, it would be worth as damn much!"

And then my wife tells me to calm down and stop ranting at the TV.

> If these O-Rings rupture, we will replace them under warranty.

See, that's a guarantee.

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