HGST ZeusRAM Z4RZF3D-8UC - $200 BO accepted

[i386]

In a perfect IT world w/ stars aligned maybe those numbers add up...aka I stand corrected heh, thought I saw @gea recently say zeusram could take 40g speeds flush but maybe I misunderstood.

The zeusram is an sas2 drive, 475mb/s write in single port mode or up to 800mb/s in dual port mode.

https://www.hgst.com/sites/default/files/resources/HGST_ZeusRAM_ds.pdf

 

[christer]

I was able to get two of these for $200 each on BO from ebay seller newworld_micro.

Used tested good 30 day warranty. Stec Z4RZF3D-8UC Zeus Ram 8GB SSD-3.5IN | eBay

5 left

 

[lowfat]

New ones available.
www.ebay.ca/itm/NEW-HGST-ZeusRAM-Z4-3-5-8GB-SAS-Hard-Drive-MLC-Enterprise-SSD-RAM-Z4RZF3D-8UC-/201822916548?hash=item2efd954fc4:g:SOYAAOSwB-1Yp02a

Offered $200. Countered w/ $275. Too rich for my blood.

 

[whitey]

Yeah lowest they'll go on those is $260 they told me.

 

[T_Minus]

At $260 or $300 I'm still like
I thought I got a deal getting a couple years ago at well over 2x haha.

 

[whitey]

I know when I picked some up @ $200 I was dancin' in my pants!

 

[Rand__]

So was I - until i saw my perf results Still think I made a mistake there to be honest, but couldnt find time to retest yet

 

[whitey]

I don't think those numbers derived were anything to scoff at though if memory serves me correct. Just not quite where you wanted them.

 

[Rand__]

Maybe true.
Probably just the expectation that was sky high since it (used to be) the ultimate slog.

 

[whitey]

Yeah ya kinda have to keep in mind though...you are comparing two devices several generations apart...the ZeusRAM is what, 7-8+ yrs old, in its heyday it was THE SLOG device champ...super low latency/good throughput (w/ respect to where the industry was)/highly reliable/consistent performance...time/technology marches on and now we have NVMe, they are probably poised to be better SLOG devices at this point long as the endurance/PLP/consistent/sustained low latency is there but the ZeusRAM will never be a slouch for 'most' workloads that it is providing write caching for off a pool of damned magnetic disks :-D

ZeusRAM DRAM is fast right but if your bottleneck is SAS interface (plus network back to SAN in most scenario's) NVMe trumps on PCIe fast track/super-highway!

 

[Monoman]

A little off topic, but @whitey what do you think about using a ZeusRAM device as a SLOG for an all SSD (inexpensive TLC) mirror?

This it will provide any improvement to wear characteristics? Performance is great, just worried about drive lie.

Thanks

 

[BackupProphet]

Very few consumer based SSD's lies when the OS sends the ATA_CMD_FLUSH/ SYNC command to the drive. What usually happen is that consumer based SSD's starts stalling and performs poorly. A ZeusRAM will improve the SYNC performance for consumer based SSD. It is just that, two mirrored enterprise SSD's would be more cost efficient.

 

[Monoman]

Thanks @BackupProphet

I'm using 2x 1TB Samsung 850 EVO's (zfs mirror, only data storage used) in a single proxmox server for my home lab. Works great performance wise just wanted to see if a ZeusRAM SLOG would provide any tangible benefits for my use case.

2x enterprise SSD's would have been best, at the time of purchase I got a really good deal and didn't consider the TLC vs MLC for my server and was just looking at the $$$

 

[T_Minus]

Theoretically it will, but when you get into heavy write where it will provide benefit even with the SLOG those EVOs will eventually run like a dog in the mud.

 

[Monoman]

Theoretically it will, but when you get into heavy write where it will provide benefit even with the SLOG those EVOs will eventually run like a dog in the mud.

Time to shop around I think.

I've done 25% overprovision to aid in dog slowness

 

[T_Minus]

What do you mean shop around? @Monoman

IMHO I wouldn't waste $$ on a ZeusRAM to use it with Samsung EVO or other consumer drives. Spend that $$ on getting 2x 400GB enterprise drives and have a little cash left over potentially. 4x Enterprise in 2 mirrored vdevs > consumer drives with bling slog

 

[Monoman]

What do you mean shop around? @Monoman

IMHO I wouldn't waste $$ on a ZeusRAM to use it with Samsung EVO or other consumer drives. Spend that $$ on getting 2x 400GB enterprise drives and have a little cash left over potentially. 4x Enterprise in 2 mirrored vdevs > consumer drives with bling slog

Shop around meaning looking for enterprise SSD's. My two 850 EVO's are a 1TB variant so best case would be to find 2 960gb + (only have 2x sata 6 on my SM server board)

We're way off topic now, thanks everyone. Sorry to derail

 

[BackupProphet]

Around christmas there was an excellent deal on enterprise Samsung drives with 960GB at 150 USD. I'm sure you will see something similar soon enough.

 

[whitey]

Very few consumer based SSD's lies when the OS sends the ATA_CMD_FLUSH/ SYNC command to the drive. What usually happen is that consumer based SSD's starts stalling and performs poorly. A ZeusRAM will improve the SYNC performance for consumer based SSD. It is just that, two mirrored enterprise SSD's would be more cost efficient.

Concur