There are people who like to use high-quality components from the corporate segment in everyday life. They want to be sure that their SSD won't die suddenly due to a power failure or when downloading huge 4K torrents daily to a fragmented NTFS partition with or the next time you compile Gentoo from source.
Of course, such fears rarely come true in practice, but it is very pleasant to use an SSD with Power Loss Protection (, , ), which has an almost limitless recording resource. And even when its capacity becomes small for current tasks, it can still be used as a flash drive or as an additional disk, donated or sold.
This article is a list of 1.92TB enterprise SSDs that are now cheaper to the level of consumer SSDs (< $300) but have a write capacity of 2 Petabytes or more.
So, thanks to the recent collapse in SSD prices, we can afford to put multi-terabyte server monsters in home PCs and laptops.
The SATA III interface itself has not been developed for a long time, so SSDs released for corporate use a few years ago are still well suited for upgrading laptops or desktops with a SATA interface, but their price has dropped significantly.
I consider this size ~2TB to be optimal when upgrading an old system:
- This is the maximum size the MBR supports. Therefore, if your BIOS does not support UEFI, then this is your option. You pump your disk subsystem to the ceiling (relevant for laptops with a single disk).
- These disks have a sector size of 512 bytes, which makes it possible to use them with any software. Even with Windows XP.
In addition to the gigantic write resource, corporate SATA SSDs differ in:
- Nutrition protection. In the event of a power failure, tantalum (rarely ceramic) capacitors provide the SATA SSD with enough energy to write the cache so that the file system does not fall apart.
- Speed ββstability. Consumers often use an SLC cache, after which the speed can drop significantly.
- Manufacturers sort flash memory chips by quality. The best ones are put into corporate SSDs.
- Sometimes MLC memory is used instead of the cheaper TLC, 3D-NAND TLC, QLC.
So, here is a table of adequately priced (up to $300) models of corporate 2TB SSDs. I looked at prices mainly on online auctions and sites like Avito. But some discs from the list can be bought in regular stores for ~25% more. The higher the disc in the table, the more profitable it can be bought.
In this table, there is an SSD not only with MLC, otherwise there would be only 2 lines left.
Name
PBW
Flash type
4k read iops, K
4k write iops, K
read, MB/s
write, MB/s
model example
3.5
MLC
75
14
524
503
THNSN81Q92CSE
2.1
MLC
75
14
530
460
SDLF1CRR-019T-1Hxx
2.8
32 layer V-NAND MLC
99
18
540
480
MZ7LM1T9HCJM
2.733
32 layer V-NAND MLC
97
28
520
480
MZ7LM1T9HMJP
2.8
V-NAND MLC
to 98
to 28
to 560
to 520
MZ-7LH1T9NE
2.1
Micron 3D eTLC
93
9-31
540
380-520
MTFDDAKxxxTBY
8.8
Micron 3D eTLC
78-93
26-43
540
250-520
MTFDDAKxxxTCB
3.5
Micron 64-layer 3D TLC NAND
95
22
540
520
MTFDDAK1T9TDC-1AT1ZABYY
5.95
Micron 64-layer 3D TLC NAND
95
32
540
520
MTFDDAK1T9TDD-1AT1ZABYY
In order to understand what speeds we will get after the upgrade, I will give a few screenshots from CrystalDiskMark 6.0.2. Many older motherboards don't have a SATA III interface, so I'll add some results from SATA II and SATA I.
Toshiba HK4R 1.92TB
SATA II
Intel ICH10R SATA AHCI
SATA III
AMD SB7x0/SB8x0/SB9x0 SATA AHCI
The surprising fact is that the SATA II controller was so successful that it outperformed the SATA III controller in a single-threaded random read / write test with a queue depth of 1.
Of interest is the performance difference between SATA I (which is still found on older motherboards) and SATA III.
SanDisk CloudSpeed ββEco II 1.92TB
SATA I
Intel 82801GBM/GHM (ICH7-M Family) SATA AHCI
SATA III
AMD SB7x0/SB8x0/SB9x0 SATA AHCI
This time the victory of SATA III is more convincing. However, with random access in 1 thread with a queue depth of 1, the difference does not exceed 20%.
Unfortunately, I could not get all the SSDs from the above table for testing. So the last picture:
Samsung PM863 1.92TB
SATA III
AMD SB7x0/SB8x0/SB9x0 SATA AHCI
Conclusions
1.92TB SSD with a capacity measured in petabytes at the price of a custom SSD will satisfy any data paranoid and is great for upgrading laptops and desktops with a SATA interface.
PS Thanks for the image. .
PPS Send the noticed errors to the PM. I raise my karma for this.
Source: habr.com