Seagate Mach.2 Review. Over 400mB/s from a HDD
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- เผยแพร่เมื่อ 3 ก.ค. 2024
- This is a review of the Seagate Mach.2 Exos 2x14 ST14000NM0081, the first dual actuator HDD. This drive is one of the fastest HDDs on the market, with nearly double the speed and IOPS of any other drive on the market. I take a look at the performance of this drives and go over how the dual actuator tech works, and how it can be used.
Let me know if you have any ideas of what I can do with this drive in the comments below.
00:00 Intro
00:37 What is a dual actuator drive?
01:54 The OS sees 2 drives?
02:16 Performance testing
03:04 Weird quirks
03:49 SMART data
04:38 Conclusion - วิทยาศาสตร์และเทคโนโลยี
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You are seriously a genius.
I love watching your videos and how you methodically go through the steps to figure things out (such as taping particular pins and such)
Thank you for your time and effort!
Thank you for your review
The reason they aren't for consumers right now is the SAS requirement. They are using the dual channels of SAS that are usually for backup (a second controller can use the drives if the first fails).
This is similar to when hybrid SSD+HDDs first came out. They were two devices until they moved the caching over to the controller and were able to make SATA drives.
I expect if there is need they will eventually do the same and make better controllers to effectively run it as a RAID that's hidden from the user so it shows as one drive.
They make SATA versions. I have one in my system right now.
Link please of product ? @@JakeSDN
Very interesting drive Thanks for sharing the video with us!💖👍😎JP
I'm a big fan of the MACH 2 drives ever since they were announced i felt this was what every hard drive should've been like in the 2010s and onwards to even have a chance of competing with SSDs. I also noticed the lack of options to buy these even the latest 18TB model hard to find no shop stocks them and then i bet seagate is gonna blame the demise of these drives on poor sales but you can't even find them.. What they need to do is make these the new standard. As for tests I wonder if there is a jumper setting for a basic raid0 on the drive itself? Because that might have consequences if you add such a drive to say a truenas server that expects a single drive with the entire capacity having two devices would mean if you lose one half you technically just lost 2 drives for storage purposes at least even with RAID Z3 would put your array at risk with only two physical drive failures.
Agreed, I feel like sata ssds aren't filling their niche either. They're way too close to nvme in pricing even at 4tb+, these can basically give sata ssd performance with a small cost to noise.
Mach2 make sense at queue depth >=2, while consumer workloads rarely exceed QD=1.
The 2 independent LUNs will be confusing for the consumers too.
Hence the positioning for the data centers only.
I think a sata version of this drive with raid 0 on the hdd controller could provide some benefit when copying files between drives. When running a file copy between drives I got about 400mBs which you make things like backups a good amount faster.
@@ElectronicsWizardry I believe, if the customers really demanded higher linear speeds and dual-actuators would be the only option, the manufacturers would choose to create internal raid0, hidden from the consumer. F.i., some higher capacity (4TB) portable consumer HDDs are made of 2 2TB 2.5inch HDDs in raid0, but raid0 is hidden from the consumer. Obviously, in this case it is done for capacity, not speed.
Remember how much effort is invested to make a newer tech backwards(-compatible) even in professional space:
- 4kn mimicked 512n
- SSD mimick HDDs through a complex flash translation layer with dramatic penalty to SSD lifespan due to write amplification
- SMR mimicks CMR.
Hi there. I wonder, did anyone thought about in a 1 actuator model, to use the heads for simultan writing data on all the platter in an order. Like platter 1 head 1 writes 0, platter 1 head 2 writes 1, etc with other plates and heads. And give it an order on assembling the digits on read, or dissambling on write. I very much simplified, but I hope you get the idea. Can this be done or there is some backdraw?
Do you know if that is a HAMR drive?
If the dual actuator drive is being read as two individual drives, if I put these in a zfs raid z2 and one of the drives dies, do you think it would count as two drives dying on the raid?
Yea it would count as 2 drives dying if both halves are being added to the array. Losing the drive would result in both halves being inaccessible to zfs.
I'm trying to understand how to make best use of these drives, which concepts are there? So far I've got:
- Raid0 for single queue of larger chunks of data
- Raid1 for multiple queues for the same data but, or single queue and greater speeds at half the size.
- clever distribution of different datasets for parallel access (i.e. via lvm?) but can this be done automatically?
Also: What is the impact on reliability of the storage system compared to separate drives?
The price seems not to be very different from slower drives of same total capacify - right?
If I had a single drive, I would probably set the drive up in raid 0 for most uses. This would give me the full capacity and speed of the drive. I don't see failure of half of the drive being a big issue, so the data protection of raid 1, so I wouldn't use this method. If I wanted to have extra data redundancy, I would purchase 2 of these drive, and run them in a raid 10. It would let either of the drives fail, while still having better performance.
LVM and similar solutions to my knowledge work by filling one drive first, then the second drive, so this would give the full space of both drive, but similar performance to a single drive. If I am using one of these dual actuator drives, I would want the full performance from it. If you have 2 datasets or workloads it may make sense to have 2 separate volumes, one for each workload. Like maybe a half for each vm.
Another reasonable setup I would consider would be to use RAID 50/60. This would give me double the iops of a normal raid 5/6 setup with the same number of drive bays.
Its hard to know about reliability as there is no good data, but my thoughts are to treat this like one drive and plan for a failure of both halves, and keep about the same redundancy as normal raid setups. These drives might also have a higher failure rate compared to traditional drives as they are a new technology, so it may be better to have a higher amount of parity/mirrored data.
I got this drive for a similar price to a normal 14TB drive, but since these are refurbished drives, I have no idea what the retail pricing would be. If the pricing is similar i would get these drives over a normal drive with the information I have now.
@@ElectronicsWizardry thank you for the answer!
you should test it with games and loading times. i still run hdds. i just optomize software to help them run better, armory crate helped ive even run starfield on my high end cmr exos drives. it actually works decently well thier not ssds but it was fun doing these things. i just want to see if a dual actuator drive would speed things up. i hope they release them mass storage is sorely needed 120 to 150 gigs a game these days and ssds cant hold my collection, id rather use the classic tech. i got 25 tb of games and media.
i bought 3 of the 2x18 SATA3 but im only getting half speed! (280mb/s) how do i get the 540+ they are advertised for?
Does it show up as 2 halves? I have seen the data versions seem to have been getting more common lately, but haven’t used one my self.
I have a Windows 11 Enterprise Plex server, and the SATA version of this drive, mine appeared as one drive.
Does a single SAS interface show you both drives or did they just hard-wire one controller to primary and second one to secondary interface like the most DGAF move in the history of HDDs?
I expected some sorta intelligent management like smart queue and stuff and got two drives on one spindle :/
Yup a single sas cable is all that's needed for these drives. The drive had dual ports for HA, but I didn't do any testing on exactly how that works.
@@ElectronicsWizardrycan my b550 mobo boot into u.2 & sas drives?
I’m planning to get a high capacity drive to retrofit my i5 rig into a NAS/Jellyfin/Docker hub and I stumbled upon this drive. So like can I connect one of these into a SAS PCIe card and then software RAID them or should I get a SAS RAID controller?
I’d probably not recommend these drives as there a bit weird and may have some issues on a desktop. But you want a hba here as my raid controllers didn’t work with these drives. They may work with other raid controllers but I have don’t have other hardware to test with.
@@ElectronicsWizardry yeah HBAs $$$ but I'm going to dive into eBay to get a good deal. But do you have a recommendation that is cheap enough to only handle like 2-4 drives.
❤
As this shows as 2 separate devices, could this be a zfs mirror in and of itself?
Yup you could use this as a zfs mirror. I don’t see a reason to do a mirror as the whole disk could fail making the mirror useless.
@@ElectronicsWizardry Good point. D'oh
raid 0/10/50/60 would probably be the best configuration for these types of drives
I'd kill for these in consumer market. Especially if we can get vastly more storage compared to SSD counterparts.
If and when they reach the consumer market, SSDs will have fallen in price enough that these will be obsolete, as with the majority of HDD technology.
@@Eisenbison debatable, ssds have a long way to go to beat hard drives in pure storage and whenever they're close its as sata ssds which are barely faster and massively more expensive.
They make these in SATA versions. I bought one from the same store in the video but the website.
@@Eisenbisonyeah fallen the prices is also the durability also fallen. So sad, those QLC soon be obsolete.
cool, but where can you buy them >: (
Yea there not really positioned for consumer sales. They sometimes pop up on eBay and that’s how I got mine.
I have a 18 TB EXOS that was branded as a "Arsenal" drive. The speculation is that EXOS drives can't be sold as new under a certain price so that people rebrand them or mark them as 'refurbished' to sell new drives as non-new drives.
QLC crying in the corner when slc cache, pseudo slc and host cache left the chag.
Yeah but what happens if 1 half dies? Do you lose the entire drive? Might as well just buy 2 separate drives and put them in raid 0.
I havent had one half fail so I’m not really sure what happens but it would be very similar to 2 drives in raid 0 failure wise. I think part of the selling point of these drives is double the density in terms of iops per drive. In some situations this can save money if it reduces the amount of servers or rack space needed but this doesn’t really apply to a desktop pc.
So, it's a 7TB hard drive with 400MB/s in RAID0.
Sleazy marketing by Seagate.
No, it's a 7TB hard drive with 200MB/s in RAID1
or a 14TB hard drive with 400MB/s in RAID0
Are u using weed dude, or u just wake up in the morning and kinda still sleepy
I don't like it. More things to go wrong. Just like those ssdhd drives that were around for a short while. Hdd will soon be history, I hope.
Why would you bother with all this innovation when HDDs are still becoming more and more obsolete?
Money. Most companies make decisions based on money, and hard drives are still cheaper than SSDs when it comes TB per dollar, not to mention how much you can write erase and write again on to them.
Obsolete? Oh boy ssd will obsolete soon with QLC disaster lol. SSD is cant be an replacement for HDD. Just look how horrible QLC it is, and they trying force "hdd is obsolete" to your brain, just for fragile weak slow QLC.
@@AchmadBadra Dude, QLC is NOT the standard for SSD. TLC is far more durable and performs much faster. The only upside QLC has is data density, but virtually every consumer M2 drive and the vast majority of 2.5 drives use TLC.
And even then, the most popular QLC consumer drive, the 870 QVO has a fairly solid track record and consumer reviews.
“Adding more platters does not improve performance”.
Oh boy. No wonder I usually skip or stop watching.
Could you explain more about how more platters affects performance?
@@ElectronicsWizardry Perhaps he's talking about the platter density, with more platters u get less density for the same drive size, in theory u could spin the drive faster with less density, but I don't see how that helps.