Labels on the stick: BM1312246878 SDCZ80-032G Made in China TAD-SDCZ80 D33724
http://www.sandisk.com/products/usb/drives/extreme/
# lsusb Bus 001 Device 027: ID 0781:5580 SanDisk Corp. SDCZ80 Flash Drive
# hdparm -I /dev/sde
/dev/sde:
ATA device, with non-removable media Model Number: SanDisk pSSD Serial Number: 0b162fc61 Firmware Revision: 3 Transport: Serial, ATA8-AST, SATA Rev 2.6 Standards: Used: ATA-8-ACS revision 2d Supported: 8 7 6 5 Configuration: Logical max current cylinders 16383 16383 heads 16 16 sectors/track 63 63 -- CHS current addressable sectors: 16514064 LBA user addressable sectors: 61282631 LBA48 user addressable sectors: 61282631 Logical Sector size: 512 bytes Physical Sector size: 512 bytes device size with M = 1024*1024: 29923 MBytes device size with M = 1000*1000: 31376 MBytes (31 GB) cache/buffer size = unknown Form Factor: 1.8 inch Nominal Media Rotation Rate: Solid State Device Capabilities: LBA, IORDY(can be disabled) Queue depth: 32 Standby timer values: spec'd by Standard, no device specific minimum R/W multiple sector transfer: Max = 1 Current = 1 Advanced power management level: disabled DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=120ns IORDY flow control=120ns Commands/features: Enabled Supported: * SMART feature set Security Mode feature set * Power Management feature set Write cache Look-ahead * Host Protected Area feature set * WRITE_BUFFER command * READ_BUFFER command * NOP cmd * DOWNLOAD_MICROCODE Advanced Power Management feature set * 48-bit Address feature set * Device Configuration Overlay feature set * Mandatory FLUSH_CACHE * FLUSH_CACHE_EXT * SMART error logging * SMART self-test * General Purpose Logging feature set * WRITE_{DMA|MULTIPLE}_FUA_EXT * 64-bit World wide name * WRITE_UNCORRECTABLE_EXT command * Segmented DOWNLOAD_MICROCODE * Gen1 signaling speed (1.5Gb/s) * Gen2 signaling speed (3.0Gb/s) * Gen3 signaling speed (6.0Gb/s) * Native Command Queueing (NCQ) * Software settings preservation * DEVICE CONFIGURATION SET/IDENTIFY DMA commands * Data Set Management TRIM supported (limit 8 blocks) * Deterministic read ZEROs after TRIM Security: Master password revision code = 65534 supported not enabled not locked not frozen not expired: security count not supported: enhanced erase 2min for SECURITY ERASE UNIT. 2min for ENHANCED SECURITY ERASE UNIT. Logical Unit WWN Device Identifier: 5001b40062b161fc NAA : 5 IEEE OUI : 001b40 Unique ID : 062b161fc Checksum: correct
# fdisk -lu /dev/sde Disk /dev/sde: 31.4 GB, 31376707072 bytes, 61282631 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 Disk identifier: 0x00000000
Device Boot Start End Blocks Id System /dev/sde1 32 61282630 30641299+ c W95 FAT32 (LBA)
This is vendor partitioning which now lost. Is FAT params was unique to my exemplar? Is there any sense to try get it from other owners?
# ./flashbench -a /dev/sde --blocksize=1024 -c 128 align 8589934592 pre 467µs on 592µs post 595µs diff 61.1µs align 4294967296 pre 468µs on 608µs post 596µs diff 76µs align 2147483648 pre 473µs on 608µs post 591µs diff 76.4µs align 1073741824 pre 493µs on 655µs post 633µs diff 92µs align 536870912 pre 462µs on 588µs post 594µs diff 59.6µs align 268435456 pre 467µs on 598µs post 580µs diff 74.9µs align 134217728 pre 458µs on 612µs post 596µs diff 84.6µs align 67108864 pre 471µs on 612µs post 594µs diff 79.2µs align 33554432 pre 474µs on 591µs post 572µs diff 68.1µs align 16777216 pre 461µs on 584µs post 562µs diff 73µs align 8388608 pre 469µs on 584µs post 563µs diff 68.1µs align 4194304 pre 466µs on 584µs post 563µs diff 70µs align 2097152 pre 472µs on 586µs post 581µs diff 59.8µs align 1048576 pre 475µs on 593µs post 577µs diff 67.1µs align 524288 pre 465µs on 585µs post 562µs diff 72.2µs align 262144 pre 496µs on 617µs post 595µs diff 71.4µs align 131072 pre 452µs on 598µs post 594µs diff 74.8µs align 65536 pre 469µs on 476µs post 470µs diff 6.53µs align 32768 pre 535µs on 576µs post 570µs diff 23.7µs align 16384 pre 568µs on 576µs post 584µs diff -192ns align 8192 pre 578µs on 578µs post 585µs diff -4057ns align 4096 pre 581µs on 577µs post 580µs diff -2706ns align 2048 pre 581µs on 577µs post 564µs diff 4.36µs
# ./flashbench -a /dev/sde --blocksize=$[8*1024] -c 96 --offset=$[240*1024*1024] align 8589934592 pre 687µs on 779µs post 819µs diff 26µs align 4294967296 pre 708µs on 793µs post 888µs diff -5055ns align 2147483648 pre 676µs on 798µs post 847µs diff 36.4µs align 1073741824 pre 703µs on 783µs post 854µs diff 4.35µs align 536870912 pre 634µs on 746µs post 821µs diff 19.2µs align 268435456 pre 621µs on 754µs post 787µs diff 50µs align 134217728 pre 662µs on 781µs post 842µs diff 28.2µs align 67108864 pre 652µs on 765µs post 839µs diff 18.7µs align 33554432 pre 658µs on 762µs post 830µs diff 18.2µs align 16777216 pre 654µs on 780µs post 839µs diff 33.3µs align 8388608 pre 664µs on 778µs post 827µs diff 32.9µs align 4194304 pre 668µs on 753µs post 819µs diff 9.58µs align 2097152 pre 654µs on 760µs post 849µs diff 8.98µs align 1048576 pre 661µs on 786µs post 826µs diff 42.4µs align 524288 pre 624µs on 751µs post 799µs diff 38.9µs align 262144 pre 645µs on 766µs post 834µs diff 26.4µs align 131072 pre 695µs on 795µs post 824µs diff 35.9µs align 65536 pre 739µs on 742µs post 685µs diff 30.1µs align 32768 pre 804µs on 795µs post 795µs diff -4158ns align 16384 pre 824µs on 825µs post 816µs diff 4.17µs
# ./flashbench -a /dev/sde --blocksize=$[4*1024] -c 96 --offset=$[240*1024*1024] align 8589934592 pre 587µs on 704µs post 723µs diff 48.8µs align 4294967296 pre 599µs on 735µs post 748µs diff 62µs align 2147483648 pre 571µs on 761µs post 749µs diff 101µs align 1073741824 pre 593µs on 700µs post 691µs diff 58.3µs align 536870912 pre 559µs on 696µs post 710µs diff 61.7µs align 268435456 pre 565µs on 689µs post 703µs diff 55.1µs align 134217728 pre 515µs on 692µs post 698µs diff 85.1µs align 67108864 pre 569µs on 700µs post 701µs diff 65µs align 33554432 pre 555µs on 727µs post 713µs diff 93.2µs align 16777216 pre 569µs on 702µs post 699µs diff 67.9µs align 8388608 pre 539µs on 702µs post 711µs diff 76.9µs align 4194304 pre 575µs on 700µs post 696µs diff 64.5µs align 2097152 pre 564µs on 712µs post 708µs diff 76µs align 1048576 pre 566µs on 708µs post 707µs diff 71.8µs align 524288 pre 564µs on 692µs post 717µs diff 51.6µs align 262144 pre 538µs on 704µs post 716µs diff 76.8µs align 131072 pre 609µs on 737µs post 732µs diff 66.7µs align 65536 pre 637µs on 628µs post 571µs diff 23.9µs align 32768 pre 671µs on 724µs post 708µs diff 34.3µs align 16384 pre 700µs on 698µs post 698µs diff -1761ns align 8192 pre 713µs on 706µs post 691µs diff 4.35µs
# ./flashbench -a /dev/sde --blocksize=$[8*1024] -c 96 --offset=$[240*1024*1024] align 8589934592 pre 674µs on 785µs post 849µs diff 23.6µs align 4294967296 pre 718µs on 817µs post 864µs diff 26.1µs align 2147483648 pre 666µs on 809µs post 855µs diff 48.9µs align 1073741824 pre 722µs on 784µs post 830µs diff 7.87µs align 536870912 pre 665µs on 762µs post 835µs diff 12µs align 268435456 pre 669µs on 772µs post 827µs diff 24.4µs align 134217728 pre 673µs on 780µs post 838µs diff 24.7µs align 67108864 pre 683µs on 777µs post 831µs diff 19.6µs align 33554432 pre 664µs on 779µs post 835µs diff 29.1µs align 16777216 pre 646µs on 780µs post 836µs diff 39.2µs align 8388608 pre 656µs on 772µs post 837µs diff 25.5µs align 4194304 pre 661µs on 770µs post 837µs diff 21.2µs align 2097152 pre 644µs on 773µs post 825µs diff 38.6µs align 1048576 pre 659µs on 770µs post 819µs diff 31.4µs align 524288 pre 644µs on 763µs post 816µs diff 33.9µs align 262144 pre 648µs on 774µs post 812µs diff 44.2µs align 131072 pre 688µs on 790µs post 830µs diff 30.8µs align 65536 pre 735µs on 745µs post 695µs diff 30.2µs align 32768 pre 784µs on 792µs post 794µs diff 2.74µs align 16384 pre 837µs on 839µs post 819µs diff 11.3µs
Some of the flashbench test results which I performed in USB 2.0 port. They totally unclear for me. May be they useless because of USB 2 bottleneck... If so is there any way to discover under the hood of this stick with flashbench in USB2 port? USB 3.0 I do not have.