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Hello there!
Here are the results for the Transcend 790 32GB.
It's a USB3.1 drive with a SM3267AE controller and Samsung 1x nm TLC NAND
(K9ADGD8U0D).
The flashdrive comes with a FAT-optimized alignment.
Disk /dev/sdd: 29,4 GiB, 31591497728 bytes, 61702144 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xc3072e18
Device Boot-flag Start End Sectors Size Id Type
/dev/sdd1 96 61702143 61702048 29,4G c W95 FAT32 (LBA)
benchflash -a -b 1024 -c 512 /dev/sdd
align 8589934592 pre 1.03ms on 1.49ms post 1.16ms diff 401µs
align 4294967296 pre 1.05ms on 1.53ms post 1.18ms diff 419µs
align 2147483648 pre 1ms on 1.49ms post 1.17ms diff 403µs
align 1073741824 pre 911µs on 1.42ms post 1.18ms diff 369µs
align 536870912 pre 912µs on 1.43ms post 1.16ms diff 394µs
align 268435456 pre 1.01ms on 1.48ms post 1.22ms diff 373µs
align 134217728 pre 971µs on 1.48ms post 1.2ms diff 389µs
align 67108864 pre 956µs on 1.44ms post 1.17ms diff 380µs
align 33554432 pre 976µs on 1.45ms post 1.17ms diff 380µs
align 16777216 pre 977µs on 1.46ms post 1.17ms diff 383µs
align 8388608 pre 1.06ms on 1.52ms post 1.17ms diff 407µs
align 4194304 pre 1.05ms on 1.53ms post 1.18ms diff 419µs
align 2097152 pre 1.07ms on 1.54ms post 1.18ms diff 417µs
align 1048576 pre 1.06ms on 1.53ms post 1.16ms diff 427µs
align 524288 pre 1.04ms on 1.55ms post 1.16ms diff 448µs
align 262144 pre 1.05ms on 1.54ms post 1.16ms diff 432µs
align 131072 pre 1.04ms on 1.54ms post 1.16ms diff 436µs
align 65536 pre 1.06ms on 1.54ms post 1.17ms diff 423µs
align 32768 pre 1.03ms on 1.28ms post 947µs diff 293µs
align 16384 pre 1.14ms on 1.17ms post 1.03ms diff 92.5µs
align 8192 pre 1.16ms on 1.15ms post 1.15ms diff -2810ns
align 4096 pre 1.17ms on 1.17ms post 1.17ms diff 2.06µs
align 2048 pre 1.23ms on 1.24ms post 1.18ms diff 32.5µs
The flash page is definately 16K, but I'm not sure about the block size,
it's probably 4MB as I found some sources.
I have anothet drive which is 2 years older, but has the same flash and
probably an older revision of the controller (SM3267AB). The older one is a
bit faster with small blocks, but slower with sequential operations.
Tested with CrytalDiskMark64 (W7 64bit - AMD A88X)
SM3267AB SM3267AE
READ
Sq Q32 102,4MB/s 114,1MB/s
4K Q32 7,334MB/s 4,453MB/s
Sq 100,3MB/s 112,0MB/s
4K 5,832MB/s 4,058MB/s
WRITE
Sq Q32 81,45MB/s 92,91MB/s
4K Q32 1,775MB/s 1,888MB/s
Sq 79,69MB/s 90,61MB/s
4K 1,554MB/s 1,654MB/s
I hope it is helpful for somebody.
Hi
Hope you are doing well!
We are offering Website Design & Development with PHP Development and Mobile
Application Development services at modest rate.
What We Do:
Creative | Design | Branding | Mobile App Development
. Logo & Corporate Identity
. Branding
. Website design (desktop/mobile/tablet)
. Video/audio production (tv/radio/web)
. Website development
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. SEO (Search Engine Optimization)
. Mobile application development
. E-Commerce & bank integration
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Business Consultant
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Hi,
I know this is a bit off-topic, but I've recently bought a 256GB SD
card with the following properties:
name: SD256
manfid: 0x000027
oemid: 0x5048
date: 05/2015
preferred_erase_size: 67108864
The device seems to support random access for up to 5 allocation
units, judging from the erease-size I guess this is a TLC device.
All in all the controller performs rather miserably when used as
root-filesystem - I am actually a bit surprised such a weak controller
is paired with flash amounting to > 40-50$.
As I have several cards with manfid 0x27 and phison controllers, I
started to wonder which company is actually behind this 0x27 id?
Thank you in advance, Clemens
