我最近购买了 KSD-PA25.6-064MS，它已预先格式化，分区从第 63 扇区开始。
我知道这对于 SSD 来说并不常见，并且可能导致过度的写入放大。但是，由于这是制造商所做的，因此可能专为此特定布局而制作。
制造商网站上的规格不要告诉您任何有关擦除块或类似信息。同样，我暂时无法直接联系制造商 - 他们的网站上似乎没有指定任何渠道可用。
是否有人做过性能测试或其他什么来找出内部参数，特别是上述问题？
我不感兴趣SSD 结构的一般信息我对 KingSpec 驱动器特别感兴趣（越接近我的型号越好）——不管它们是否特别。
答案1
我最终没能得到任何我收到了制造商的答复，即使我抄送给了他们的海外销售经理（这是他们网站上唯一有效的联系渠道），他也会将我的消息转发给相应的部门并请求他们作出答复。
根据确定 SSD 的内部扇区大小以进行可能的分区对齐 - PC Review 新闻组，KingSpec 驱动器使用普通的第三方闪存芯片（对于低价位产品而言，这是意料之中的事） - 因此出现任何异常内部现象的可能性非常小。
根据 flashbench输出：
$ flashbench -a /dev/sda -b 1024
align 536870912 pre 547Вµs on 702Вµs post 528Вµs diff 164Вµs
align 268435456 pre 540Вµs on 700Вµs post 544Вµs diff 158Вµs
align 134217728 pre 565Вµs on 717Вµs post 531Вµs diff 168Вµs
align 67108864 pre 571Вµs on 727Вµs post 547Вµs diff 168Вµs
align 33554432 pre 554Вµs on 732Вµs post 554Вµs diff 178Вµs
align 16777216 pre 568Вµs on 664Вµs post 551Вµs diff 104Вµs
align 8388608 pre 575Вµs on 644Вµs post 590Вµs diff 61.2Вµs
align 4194304 pre 576Вµs on 644Вµs post 590Вµs diff 60.9Вµs
align 2097152 pre 576Вµs on 645Вµs post 591Вµs diff 61.5Вµs
align 1048576 pre 577Вµs on 646Вµs post 591Вµs diff 61.8Вµs
align 524288 pre 576Вµs on 646Вµs post 593Вµs diff 61.5Вµs
align 262144 pre 575Вµs on 646Вµs post 590Вµs diff 62.8Вµs
align 131072 pre 583Вµs on 649Вµs post 574Вµs diff 70.3Вµs
align 65536 pre 585Вµs on 653Вµs post 582Вµs diff 70Вµs
align 32768 pre 586Вµs on 652Вµs post 580Вµs diff 68.7Вµs
align 16384 pre 584Вµs on 624Вµs post 586Вµs diff 39.4Вµs
align 8192 pre 586Вµs on 605Вµs post 587Вµs diff 19Вµs
align 4096 pre 585Вµs on 605Вµs post 586Вµs diff 19.4Вµs
align 2048 pre 584Вµs on 584Вµs post 585Вµs diff 379ns
我的驱动器使用 16K 扇区和 16M 擦除块。
现在，让我们看看分区的时间安排：
$ flashbench -a /dev/sda1 -b 1024
align 536870912 pre 690Вµs on 671Вµs post 722Вµs diff -35600n
align 268435456 pre 707Вµs on 683Вµs post 734Вµs diff -37774n
align 134217728 pre 691Вµs on 672Вµs post 724Вµs diff -36217n
align 67108864 pre 711Вµs on 688Вµs post 741Вµs diff -37954n
align 33554432 pre 717Вµs on 694Вµs post 746Вµs diff -37195n
align 16777216 pre 714Вµs on 692Вµs post 744Вµs diff -36476n
align 8388608 pre 759Вµs on 736Вµs post 786Вµs diff -36996n
align 4194304 pre 757Вµs on 732Вµs post 782Вµs diff -37075n
align 2097152 pre 758Вµs on 733Вµs post 783Вµs diff -38152n
align 1048576 pre 757Вµs on 735Вµs post 788Вµs diff -37275n
align 524288 pre 759Вµs on 736Вµs post 786Вµs diff -36078n
align 262144 pre 754Вµs on 733Вµs post 789Вµs diff -38073n
align 131072 pre 738Вµs on 718Вµs post 766Вµs diff -33265n
align 65536 pre 747Вµs on 728Вµs post 773Вµs diff -32086n
align 32768 pre 745Вµs on 725Вµs post 776Вµs diff -35799n
WTF？没有图案，消极的差异？事实上，这表明读取未与 SSD 块对齐。
事实上，如果我将分区起始位置改为第 64 扇区，输出将变得更符合预期：
$ flashbench -a /dev/sda1 -b 1024
align 536870912 pre 531Вµs on 600Вµs post 530Вµs diff 69.3Вµs
align 268435456 pre 543Вµs on 611Вµs post 542Вµs diff 68.4Вµs
align 134217728 pre 531Вµs on 600Вµs post 531Вµs diff 68.9Вµs
align 67108864 pre 548Вµs on 618Вµs post 548Вµs diff 69.8Вµs
align 33554432 pre 555Вµs on 624Вµs post 553Вµs diff 70.4Вµs
align 16777216 pre 552Вµs on 622Вµs post 552Вµs diff 69.9Вµs
align 8388608 pre 594Вµs on 664Вµs post 592Вµs diff 71.1Вµs
align 4194304 pre 593Вµs on 660Вµs post 590Вµs diff 68.7Вµs
align 2097152 pre 590Вµs on 660Вµs post 593Вµs diff 69.1Вµs
align 1048576 pre 593Вµs on 665Вµs post 595Вµs diff 71.6Вµs
align 524288 pre 594Вµs on 663Вµs post 591Вµs diff 70.1Вµs
align 262144 pre 593Вµs on 664Вµs post 594Вµs diff 70.5Вµs
align 131072 pre 578Вµs on 643Вµs post 577Вµs diff 65.4Вµs
align 65536 pre 583Вµs on 650Вµs post 577Вµs diff 70Вµs
align 32768 pre 583Вµs on 654Вµs post 587Вµs diff 68.8Вµs
align 16384 pre 581Вµs on 623Вµs post 584Вµs diff 40.4Вµs
align 8192 pre 583Вµs on 601Вµs post 582Вµs diff 17.9Вµs
align 4096 pre 582Вµs on 601Вµs post 583Вµs diff 19Вµs
align 2048 pre 581Вµs on 581Вµs post 581Вµs diff -479ns