Samsung 870 EVO vs QVO

kenny saunders · 17 Jun 2021 at 17:54

Hi. Is it worth an extra £90 for the EVO as I heard the EVO is only faster if you copy more than 42GB or something?

Murphy · 17 Jun 2021 at 18:31

Depends what size you go for as the SLC cache (the cache that makes it as fast as the EVO) depends on the total size of the drive, 1TB it's 42GB, above that it's 78GB.

If it's going to be a storage/game drive QVO would be the better value for money option IMO.

kenny saunders · 17 Jun 2021 at 19:18

Murphy said:
Depends what size you go for as the SLC cache (the cache that makes it as fast as the EVO) depends on the total size of the drive, 1TB it's 42GB, above that it's 78GB.

If it's going to be a storage/game drive QVO would be the better value for money option IMO.

Well I want a 4tb so that seems like QVO will do fine, its for music production libraries so its going to be read only mostly.

Does the QVO have the same write perfomance?

Murphy · 17 Jun 2021 at 22:31

It does until you fill the 78GB cache then it craters (going from around 530 to 160 MB/s) until it's had time to flush the 78GB SLC cache to the QLC NAND.

The other differences IIRC are the QVO comes with 2 years less warranty (3 vs 5) and lower endurance of 1440 vs 2400 TBW.

kenny saunders · 17 Jun 2021 at 22:50

Murphy said:
It does until you fill the 78GB cache then it craters (going from around 530 to 160 MB/s) until it's had time to flush the 78GB SLC cache to the QLC NAND.

The other differences IIRC are the QVO comes with 2 years less warranty (3 vs 5) and lower endurance of 1440 vs 2400 TBW.

Actually its probably worth it just for the increased TBW, its only money...

thanks.

I'm going to get a DS218play NAS because I dont want any hard drives in the build but do you know if they power the disks off when not used for a time like in a pc. I can see that there are special disks for nas that are optimised for being on all the time, but initially I'll be using just regular hard disks, so i'd like them to power down like a pc?

Murphy · 17 Jun 2021 at 22:52

If it's only money can i borrow a tenner...

j/k

On the NAS front i don't have any experience with them, hopefully someone else can chime in.

kenny saunders · 17 Jun 2021 at 22:57

heh, is monopoly money ok? I must admit though, things have gotten out of hand with this build! Thanks

Snapshot · 18 Jun 2021 at 08:38

Yes, most if not all NAS can power down their drives after a period of inactivity. But be aware that some apps on the NAS can prevent this.

kenny saunders · 18 Jun 2021 at 10:39

Snapshot said:
Yes, most if not all NAS can power down their drives after a period of inactivity. But be aware that some apps on the NAS can prevent this.

Ok thanks for the info.

Tetras · 22 Jun 2021 at 00:43

It's not a particularly big issue with SSDs like it would have been a dozen HDDs, because they use very little power in idle and if I remember right from reviews the Samsung drives are pretty good when idle, even without the support of a modern OS. From the very best to very worst it's only like... 1 watt.

If the drive is going to be 99% read only then QLC memory wouldn't bother me at all, but one concern I'd have that may have no actual foundation is that I'm not sure if data retention is similar for QLC drives and if these will be long-term parked in a NAS, it's something I'd investigate.