Sandisk Ultra Fit USB 3.0 32GB Zwart

Falen

In de praktijk stopte deze stick er na 1078 dagen mee. Helaas weer eens zonder dat de data read-only leesbaar zijn. De kernel komt niet verder dan:

• usb 1-2: reset high-speed USB device number 3 using xhci-hcd
• xhci-hcd xhci-hcd: xHCI xhci_drop_endpoint called with disabled ep 86e89700
• xhci-hcd xhci-hcd: xHCI xhci_drop_endpoint called with disabled ep 86e8972c
• en na 5 keer: "scsi 1:0:0:0: Device offlined - not ready after error recovery"

Energieverbruik

Gemeten met de LMG95 (i.p.v. Mux USB-sensor) is het standby energieverbruik 526-531 mW (102,6-103,0 mA) van deze SanDisk Ultra Fit 32GB.

Uren na het insteken daalt het standby verbruik tot 249-250 mW (48,3-48,5 mA). Vreemd genoeg blijft de stick in dit lagere standbyverbruik na een lees/schrijfoperatie vervolgens direct weer naar dit lagere niveau terugkeren.

Prestaties

CrystalDiskBench

* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

Sequential Read (Q= 32,T= 1) : 78.221 MB/s
Sequential Write (Q= 32,T= 1) : 37.141 MB/s
Random Read 4KiB (Q= 32,T= 1) : 3.689 MB/s [ 900.6 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 2.435 MB/s [ 594.5 IOPS]
Sequential Read (T= 1) : 80.562 MB/s
Sequential Write (T= 1) : 35.044 MB/s
Random Read 4KiB (Q= 1,T= 1) : 3.655 MB/s [ 892.3 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 2.384 MB/s [ 582.0 IOPS]

Test : 1024 MiB [E: 0.1% (0.0/28.6 GiB)] (x5) [Interval=5 sec]

dd snelheid

Snelheden in een USB 2.0 hub

$ dd if=/dev/zero of=./SANDISK/emptybunchofzeros.bin bs=1048576 count=8192
16,34 megabytes/sec

Snelheid direct in een USB 3.0 poort

$ dd if=/dev/zero of=./NO\ NAME/emptybunchofzeros.bin bs=1048576 count=8192
25,60 megabytes/sec

Xbench

via USB 3.0 poort zonder hub

Uncached

Sequential
write
4K blokken: 77,46 MB/sec
256K blokken: 60,76 MB/sec
read
4K blokken: 17,70 MB/sec
256K blokken: 122,24 MB/sec

Random
write
4K blokken: 3,40 MB/sec
256K blokken: 61,36 MB/sec
read
4K blokken: 4,11 MB/sec
256K blokken: 75,72 MB/sec

via USB 2.0 hub

Uncached

Sequential
write
4K blokken: 28,46 MB/sec
256K blokken: 26,48 MB/sec
read
4K blokken: 11,83 MB/sec
256K blokken: 34,08 MB/sec

Random
write
4K blokken: 3,05 MB/sec
256K blokken: 27,14 MB/sec
read
4K blokken: 3,82 MB/sec
256K blokken: 29,69 MB/sec

ChipGenius v4.00.1024 (2015)

Current Speed: High Speed
Max Current: 224mA

USB Device ID: VID = 0781 PID = 5583
Serial Number: 4C530001190318119201

Device Vendor: SanDisk
Device Name: Ultra Fit
Device Revision: 0100

Manufacturer: SanDisk
Product Model: Ultra Fit
Product Revision: 1.00

Controller Part-Number: Unknown

Flash drive information extractor 8.7.0.597

Controller: SanDisk
Possible Memory Chip(s): Not available
VID: 0781
PID: 5583
Manufacturer: SanDisk
Product: Ultra Fit
Query Vendor ID: SanDisk
Query Product ID: Ultra Fit
Query Product Revision: 1.00
Physical Disk Capacity: 30752000000 Bytes
Windows Disk Capacity: 30736957440 Bytes
Internal Tags: 3X4F-8CDY
File System: FAT32
Relative Offset: 16 KB
USB Version: 3.00 in 2.00 port
Declared Power: 224 mA
ContMeas ID: FF44-03-00

Flashbench

$ sudo flashbench -a /dev/sdb --blocksize=1024
align 8589934592 pre 1.42ms on 2.12ms post 1.71ms diff 553µs
align 4294967296 pre 1.42ms on 2.12ms post 1.42ms diff 695µs
align 2147483648 pre 1.42ms on 1.5ms post 1.42ms diff 82.9µs
align 1073741824 pre 1.49ms on 1.58ms post 1.43ms diff 116µs
align 536870912 pre 1.45ms on 1.57ms post 1.46ms diff 113µs
align 268435456 pre 1.42ms on 1.5ms post 1.42ms diff 82.8µs
align 134217728 pre 1.57ms on 1.78ms post 1.61ms diff 192µs
align 67108864 pre 1.51ms on 1.65ms post 1.45ms diff 170µs
align 33554432 pre 1.58ms on 1.76ms post 1.58ms diff 177µs
align 16777216 pre 1.52ms on 1.75ms post 1.58ms diff 206µs
align 8388608 pre 1.55ms on 1.69ms post 1.55ms diff 141µs
align 4194304 pre 1.56ms on 1.7ms post 1.53ms diff 161µs
align 2097152 pre 1.53ms on 1.58ms post 1.53ms diff 47.3µs
align 1048576 pre 1.53ms on 1.55ms post 1.54ms diff 9.78µs
align 524288 pre 1.55ms on 1.56ms post 1.55ms diff 10.3µs
align 262144 pre 1.56ms on 1.56ms post 1.55ms diff 8.5µs
align 131072 pre 1.55ms on 1.57ms post 1.56ms diff 20µs
align 65536 pre 1.55ms on 1.56ms post 1.56ms diff 7.29µs
align 32768 pre 1.55ms on 1.56ms post 1.55ms diff 9.88µs
align 16384 pre 1.55ms on 1.6ms post 1.55ms diff 45.3µs
align 8192 pre 1.55ms on 1.57ms post 1.55ms diff 20.9µs
align 4096 pre 1.55ms on 1.57ms post 1.55ms diff 16.8µs
align 2048 pre 1.56ms on 1.57ms post 1.55ms diff 12µs

open AUs

Linear: >96

$ sudo flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdb --open-au-nr=2
4MiB 29M/s
2MiB 31.5M/s
1MiB 31.6M/s
512KiB 30.8M/s
256KiB 28.9M/s

$ sudo flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdb --open-au-nr=96
4MiB 30.8M/s
2MiB 31.1M/s
1MiB 30.8M/s
512KiB 29.5M/s
256KiB 27.7M/s

Random: >128

$ sudo flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdb --random --open-au-nr=10
4MiB 31.2M/s
2MiB 31.4M/s
1MiB 31.4M/s
512KiB 30.3M/s
256KiB 28.7M/s

$ sudo flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdb --random --open-au-nr=100
4MiB 30.7M/s
2MiB 31.1M/s
1MiB 30.6M/s
512KiB 29.6M/s
256KiB 27.5M/s

$ sudo flashbench -O --erasesize=$[4 * 1024 * 1024] --blocksize=$[256 * 1024] /dev/sdb --random --open-au-nr=128
4MiB 30.9M/s
2MiB 31M/s
1MiB 30.7M/s
512KiB 29.4M/s
256KiB 27.3M/s