Re: Slow external USB enclosure with SATA disk

["Thomas Mueller" <mueller6724%bellsouth.net@localhost>]

from Andy Ruhl:

> I recently bought a USB3 disk enclosure for a SATA disk. I put a disk in
> there, and writes are really slow with NetBSD. Less than 1MB/s. I formatted
> it normally, I made a NetBSD fdisk partition, then made a disklabel with
> just one slice, called sd0a which fills the entire fdisk partition. I tried
> formatting with regular ffs and also with -O 2. The format process was
> pretty slow for both filesystem types, so I guess the problem is lower down.
        
> I plugged it into Windows and formatted it (NTFS), and it allows hundreds
> of megabytes per second to be written. I didn't test read performance.
        
> USB disks are not something I know much about in a NetBSD context, so I
> don't really know what to do. I looked at scsictl, and other ctls but it
> seems like the disk won't allow them to be changed.
        
> What should I try?

What kind of USB port is your USB3 disk enclosure plugged into?

USB 1.1, 2.0 or 3.0?  I thought NetBSD didn't support USB 3.0; neither does 
OpenBSD.

Tom