700MB/S is sync speed, 1G/S is direct speed, may be ntfs3 not support io direct. 2022-04-30 1:05 GMT+08:00, youling 257 <youling257@xxxxxxxxx>: > 700MB/S is USB Mass Storage device speed, 1GB/S is usb uas speed, > may be ntfs3 not support uas. > > 2022-04-30 1:03 GMT+08:00, youling 257 <youling257@xxxxxxxxx>: >> [ 3193.462354] usb 4-1: new SuperSpeed Plus Gen 2x2 USB device number >> 3 using xhci_hcd >> [ 3193.501223] >> scsi host9: uas >> [ 3194.397127] scsi 9:0:0:0: Direct-Access ASMT ASM236X NVME >> 0 PQ: 0 ANSI: 6 >> [ 3194.537445] >> sd 9:0:0:0: Attached scsi generic sg0 type 0 >> [ 3194.537841] sd 9:0:0:0: [sda] 500118192 512-byte logical blocks: >> (256 GB/238 GiB) >> [ >> 3194.537913] sd 9:0:0:0: [sda] Write Protect is off >> [ 3194.537916] sd 9:0:0:0: [sda] Mode Sense: 43 00 00 00 >> >> [ 3194.538036] >> sd 9:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't >> support DPO or FUA >> [ 3194.538565] sd 9:0:0:0: [sda] Optimal transfer size 2097152 bytes >> >> [ 3194.563302] >> sda: sda1 sda2 sda3 >> [ 3194.564255] sd 9:0:0:0: [sda] Attached SCSI disk >> >> in my test, ntfs3 slow than ntfs-3g. >> >> ntfs-3g /dev/block/sda3 /1 >> >> /dev/block/sda3 on /1 type fuseblk >> (rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096) >> root@localhost:~# cd /1 >> root@localhost:/1# time dd if=/dev/zero of=testw.dbf bs=1M count=1000 >> oflag=direct status=progress >> 1018167296字节（1.0 GB，971 MiB）已复制，1 s，1.0 GB/s >> 记录了1000+0 的读入 >> 记录了1000+0 的写出 >> 1048576000字节（1.0 GB，1000 MiB）已复制，1.03421 s，1.0 GB/s >> >> >> >> mount -t ntfs3 /dev/block/sda3 /1 >> >> /dev/block/sda3 on /1 type ntfs3 (rw,relatime,uid=0,gid=0,iocharset=utf8) >> root@localhost:/# cd /1 >> root@localhost:/1# time dd if=/dev/zero of=testw.dbf bs=1M count=1000 >> oflag=direct status=progress >> 707788800字节（708 MB，675 MiB）已复制，1 s，707 MB/s >> 记录了1000+0 的读入 >> 记录了1000+0 的写出 >> 1048576000字节（1.0 GB，1000 MiB）已复制，1.50322 s，698 MB/s >> >
