Bug 231065

Summary: USB-Disk not at full speed
Product: Base System Reporter: lothar.linhard
Component: armAssignee: Bugmeister <bugmeister>
Status: Closed Overcome By Events    
Severity: Affects Some People Keywords: performance
Priority: ---    
Version: 10.2-RELEASE   
Hardware: arm   
OS: Any   

Description lothar.linhard 2018-08-31 19:57:44 UTC 

    


    


      



        
          Comment 1
        

        
          lothar.linhard

        

        
        

        
          2018-08-31 20:23:18 UTC
        

      






I compare the data transfer rate on FreeBSD 11.2 (same on 11.1) with Debian Stretch (Raspbian) on the same hardware: with "dd if=/dev/da0 of=/dev/null bs=32k"

On FreeBSD, I get approx 13MB/s
On Debian,  I get approx 37MB/s

My hardware is the Raspberry PI2 B (Cortex-A7) and a 2TB Intenso External USB Disk. Here is some information from /var/log/messages:

 kernel: ugen0.4: <Intenso External USB 3.0> at usbus0
 kernel: umass0
 kernel: on uhub1
 kernel: umass0: <Intenso External USB 3.0, class 0/0, rev 2.10/3.07, addr 4> on usbus0
 kernel: da0 at umass-sim0 bus 0 scbus0 target 0 lun 0
Aug 31 18:09:12 rpiBackup kernel: da0: <Intenso External USB 3.0 5438> Fixed Direct Access SPC-4 SCSI device
 kernel: da0: Serial Number 20161117015346
 kernel: da0: 40.000MB/s transfers
 kernel: da0: 1907729MB (3907029164 512 byte sectors)
 kernel: da0: quirks=0x2<NO_6_BYTE>

    


    


      



        
          Comment 2
        

        
          Mark Linimon

        

        
            freebsd_committer
            freebsd_triage
        

        
          2025-02-11 00:42:21 UTC
        

      






^Triage: I'm sorry that this PR did not get addressed in a timely fashion.

By now, the version that it was created against is long out of support.
Please re-open if it is still a problem on a supported version.