[OpenIndiana-discuss] USB 2 performance

[Jean-Pierre André]

Jean-Pierre André wrote:
> Aurélien Larcher wrote:
>> Hi,

[...]

>>>
>>> using NTFS-3g
>>> $ dd if=FreeDOS-1.1-memstick-2-2048M.img
>>> of=/mnt/FreeDOS-1.1-memstick-2-2048M.img
>>> 3948544+0 records in
>>> 3948544+0 records out
>>> 2021654528 bytes (2.0 GB) copied, 15867.8 s, 127 kB/s
>>>
>>> After reformating to UFS
>>> $ dd if=FreeDOS-1.1-memstick-2-2048M.img
>>> of=/mnt/ben/FreeDOS-1.1-memstick-2-2048M.img
>>> 3948544+0 records in
>>> 3948544+0 records out
>>> 2021654528 bytes (2.0 GB) copied, 110.893 s, 18.2 MB/s
>>>
>>>
>>> Yeah, really, something is wrong with the implementation of FAT/NTFS
>>> on OpenIndiana.
>>> Would a more recent NTFS-3G help ? Currently using 2012.1.15AR.8 from
>>> SFE.
>
> Which version of ntfs-3g were you using and what are
> your mount options ? What is the output of "ntfs-3g -help" ?
>

Oh, I forgot : retry dd with option "bs=4096", so that the
fuse kernel module need not concatenate write chunks (the
default block size is 512 for dd).

Jean-Pierre